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, |
Stephen Warren | 0754139 | 2011-04-19 15:25:09 -0600 | [diff] [blame] | 31 | int mclk) |
Stephen Warren | a50a399 | 2011-01-07 22:36:15 -0700 | [diff] [blame] | 32 | { |
| 33 | int new_baseclock; |
Stephen Warren | 0754139 | 2011-04-19 15:25:09 -0600 | [diff] [blame] | 34 | bool clk_change; |
Stephen Warren | a50a399 | 2011-01-07 22:36:15 -0700 | [diff] [blame] | 35 | int err; |
| 36 | |
| 37 | switch (srate) { |
| 38 | case 11025: |
| 39 | case 22050: |
| 40 | case 44100: |
| 41 | case 88200: |
| 42 | new_baseclock = 56448000; |
| 43 | break; |
| 44 | case 8000: |
| 45 | case 16000: |
| 46 | case 32000: |
| 47 | case 48000: |
| 48 | case 64000: |
| 49 | case 96000: |
| 50 | new_baseclock = 73728000; |
| 51 | break; |
| 52 | default: |
| 53 | return -EINVAL; |
| 54 | } |
| 55 | |
Stephen Warren | 0754139 | 2011-04-19 15:25:09 -0600 | [diff] [blame] | 56 | clk_change = ((new_baseclock != data->set_baseclock) || |
Stephen Warren | d64e57c | 2011-01-28 14:26:40 -0700 | [diff] [blame] | 57 | (mclk != data->set_mclk)); |
Stephen Warren | 0754139 | 2011-04-19 15:25:09 -0600 | [diff] [blame] | 58 | if (!clk_change) |
| 59 | return 0; |
Stephen Warren | a50a399 | 2011-01-07 22:36:15 -0700 | [diff] [blame] | 60 | |
Stephen Warren | d64e57c | 2011-01-28 14:26:40 -0700 | [diff] [blame] | 61 | data->set_baseclock = 0; |
| 62 | data->set_mclk = 0; |
Stephen Warren | a50a399 | 2011-01-07 22:36:15 -0700 | [diff] [blame] | 63 | |
Stephen Warren | d64e57c | 2011-01-28 14:26:40 -0700 | [diff] [blame] | 64 | clk_disable(data->clk_cdev1); |
| 65 | clk_disable(data->clk_pll_a_out0); |
| 66 | clk_disable(data->clk_pll_a); |
Stephen Warren | a50a399 | 2011-01-07 22:36:15 -0700 | [diff] [blame] | 67 | |
Stephen Warren | d64e57c | 2011-01-28 14:26:40 -0700 | [diff] [blame] | 68 | err = clk_set_rate(data->clk_pll_a, new_baseclock); |
Stephen Warren | a50a399 | 2011-01-07 22:36:15 -0700 | [diff] [blame] | 69 | if (err) { |
Stephen Warren | d64e57c | 2011-01-28 14:26:40 -0700 | [diff] [blame] | 70 | 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] | 71 | return err; |
| 72 | } |
| 73 | |
Stephen Warren | d64e57c | 2011-01-28 14:26:40 -0700 | [diff] [blame] | 74 | err = clk_set_rate(data->clk_pll_a_out0, mclk); |
Stephen Warren | a50a399 | 2011-01-07 22:36:15 -0700 | [diff] [blame] | 75 | if (err) { |
Stephen Warren | d64e57c | 2011-01-28 14:26:40 -0700 | [diff] [blame] | 76 | 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] | 77 | return err; |
| 78 | } |
| 79 | |
| 80 | /* Don't set cdev1 rate; its locked to pll_a_out0 */ |
| 81 | |
Stephen Warren | d64e57c | 2011-01-28 14:26:40 -0700 | [diff] [blame] | 82 | err = clk_enable(data->clk_pll_a); |
Stephen Warren | a50a399 | 2011-01-07 22:36:15 -0700 | [diff] [blame] | 83 | if (err) { |
Stephen Warren | d64e57c | 2011-01-28 14:26:40 -0700 | [diff] [blame] | 84 | dev_err(data->dev, "Can't enable pll_a: %d\n", err); |
Stephen Warren | a50a399 | 2011-01-07 22:36:15 -0700 | [diff] [blame] | 85 | return err; |
| 86 | } |
| 87 | |
Stephen Warren | d64e57c | 2011-01-28 14:26:40 -0700 | [diff] [blame] | 88 | err = clk_enable(data->clk_pll_a_out0); |
Stephen Warren | a50a399 | 2011-01-07 22:36:15 -0700 | [diff] [blame] | 89 | if (err) { |
Stephen Warren | d64e57c | 2011-01-28 14:26:40 -0700 | [diff] [blame] | 90 | 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] | 91 | return err; |
| 92 | } |
| 93 | |
Stephen Warren | d64e57c | 2011-01-28 14:26:40 -0700 | [diff] [blame] | 94 | err = clk_enable(data->clk_cdev1); |
Stephen Warren | a50a399 | 2011-01-07 22:36:15 -0700 | [diff] [blame] | 95 | if (err) { |
Stephen Warren | d64e57c | 2011-01-28 14:26:40 -0700 | [diff] [blame] | 96 | dev_err(data->dev, "Can't enable cdev1: %d\n", err); |
Stephen Warren | a50a399 | 2011-01-07 22:36:15 -0700 | [diff] [blame] | 97 | return err; |
| 98 | } |
| 99 | |
Stephen Warren | d64e57c | 2011-01-28 14:26:40 -0700 | [diff] [blame] | 100 | data->set_baseclock = new_baseclock; |
| 101 | data->set_mclk = mclk; |
Stephen Warren | a50a399 | 2011-01-07 22:36:15 -0700 | [diff] [blame] | 102 | |
| 103 | return 0; |
| 104 | } |
Stephen Warren | a3cd50d | 2011-02-22 17:23:56 -0700 | [diff] [blame] | 105 | EXPORT_SYMBOL_GPL(tegra_asoc_utils_set_rate); |
Stephen Warren | a50a399 | 2011-01-07 22:36:15 -0700 | [diff] [blame] | 106 | |
Stephen Warren | d64e57c | 2011-01-28 14:26:40 -0700 | [diff] [blame] | 107 | int tegra_asoc_utils_init(struct tegra_asoc_utils_data *data, |
| 108 | struct device *dev) |
Stephen Warren | a50a399 | 2011-01-07 22:36:15 -0700 | [diff] [blame] | 109 | { |
| 110 | int ret; |
| 111 | |
Stephen Warren | d64e57c | 2011-01-28 14:26:40 -0700 | [diff] [blame] | 112 | data->dev = dev; |
| 113 | |
| 114 | data->clk_pll_a = clk_get_sys(NULL, "pll_a"); |
| 115 | if (IS_ERR(data->clk_pll_a)) { |
| 116 | dev_err(data->dev, "Can't retrieve clk pll_a\n"); |
| 117 | ret = PTR_ERR(data->clk_pll_a); |
Stephen Warren | a50a399 | 2011-01-07 22:36:15 -0700 | [diff] [blame] | 118 | goto err; |
| 119 | } |
| 120 | |
Stephen Warren | d64e57c | 2011-01-28 14:26:40 -0700 | [diff] [blame] | 121 | data->clk_pll_a_out0 = clk_get_sys(NULL, "pll_a_out0"); |
| 122 | if (IS_ERR(data->clk_pll_a_out0)) { |
| 123 | dev_err(data->dev, "Can't retrieve clk pll_a_out0\n"); |
| 124 | ret = PTR_ERR(data->clk_pll_a_out0); |
Stephen Warren | 422650e | 2011-01-11 12:48:53 -0700 | [diff] [blame] | 125 | goto err_put_pll_a; |
Stephen Warren | a50a399 | 2011-01-07 22:36:15 -0700 | [diff] [blame] | 126 | } |
| 127 | |
Stephen Warren | d64e57c | 2011-01-28 14:26:40 -0700 | [diff] [blame] | 128 | data->clk_cdev1 = clk_get_sys(NULL, "cdev1"); |
| 129 | if (IS_ERR(data->clk_cdev1)) { |
| 130 | dev_err(data->dev, "Can't retrieve clk cdev1\n"); |
| 131 | ret = PTR_ERR(data->clk_cdev1); |
Stephen Warren | 422650e | 2011-01-11 12:48:53 -0700 | [diff] [blame] | 132 | goto err_put_pll_a_out0; |
Stephen Warren | a50a399 | 2011-01-07 22:36:15 -0700 | [diff] [blame] | 133 | } |
| 134 | |
| 135 | return 0; |
| 136 | |
Stephen Warren | 422650e | 2011-01-11 12:48:53 -0700 | [diff] [blame] | 137 | err_put_pll_a_out0: |
Stephen Warren | d64e57c | 2011-01-28 14:26:40 -0700 | [diff] [blame] | 138 | clk_put(data->clk_pll_a_out0); |
Stephen Warren | 422650e | 2011-01-11 12:48:53 -0700 | [diff] [blame] | 139 | err_put_pll_a: |
Stephen Warren | d64e57c | 2011-01-28 14:26:40 -0700 | [diff] [blame] | 140 | clk_put(data->clk_pll_a); |
Stephen Warren | a50a399 | 2011-01-07 22:36:15 -0700 | [diff] [blame] | 141 | err: |
Stephen Warren | a50a399 | 2011-01-07 22:36:15 -0700 | [diff] [blame] | 142 | return ret; |
| 143 | } |
Stephen Warren | a3cd50d | 2011-02-22 17:23:56 -0700 | [diff] [blame] | 144 | EXPORT_SYMBOL_GPL(tegra_asoc_utils_init); |
Stephen Warren | a50a399 | 2011-01-07 22:36:15 -0700 | [diff] [blame] | 145 | |
Stephen Warren | d64e57c | 2011-01-28 14:26:40 -0700 | [diff] [blame] | 146 | void tegra_asoc_utils_fini(struct tegra_asoc_utils_data *data) |
Stephen Warren | a50a399 | 2011-01-07 22:36:15 -0700 | [diff] [blame] | 147 | { |
Stephen Warren | d64e57c | 2011-01-28 14:26:40 -0700 | [diff] [blame] | 148 | clk_put(data->clk_cdev1); |
| 149 | clk_put(data->clk_pll_a_out0); |
| 150 | clk_put(data->clk_pll_a); |
Stephen Warren | a50a399 | 2011-01-07 22:36:15 -0700 | [diff] [blame] | 151 | } |
Stephen Warren | a3cd50d | 2011-02-22 17:23:56 -0700 | [diff] [blame] | 152 | EXPORT_SYMBOL_GPL(tegra_asoc_utils_fini); |
Stephen Warren | a50a399 | 2011-01-07 22:36:15 -0700 | [diff] [blame] | 153 | |
Stephen Warren | a3cd50d | 2011-02-22 17:23:56 -0700 | [diff] [blame] | 154 | MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>"); |
| 155 | MODULE_DESCRIPTION("Tegra ASoC utility code"); |
| 156 | MODULE_LICENSE("GPL"); |