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1 | 1 | // SPDX-License-Identifier: GPL-2.0 |
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2 | | -/* Copyright (C) 2012-2018 ARM Limited or its affiliates. */ |
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| 2 | +/* Copyright (C) 2012-2019 ARM Limited (or its affiliates). */ |
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3 | 3 | |
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4 | 4 | #include <linux/kernel.h> |
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5 | 5 | #include <linux/interrupt.h> |
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.. | .. |
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8 | 8 | #include "cc_buffer_mgr.h" |
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9 | 9 | #include "cc_request_mgr.h" |
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10 | 10 | #include "cc_sram_mgr.h" |
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11 | | -#include "cc_ivgen.h" |
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12 | 11 | #include "cc_hash.h" |
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13 | 12 | #include "cc_pm.h" |
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14 | 13 | #include "cc_fips.h" |
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.. | .. |
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16 | 15 | #define POWER_DOWN_ENABLE 0x01 |
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17 | 16 | #define POWER_DOWN_DISABLE 0x00 |
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18 | 17 | |
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19 | | -const struct dev_pm_ops ccree_pm = { |
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20 | | - SET_RUNTIME_PM_OPS(cc_pm_suspend, cc_pm_resume, NULL) |
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21 | | -}; |
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22 | | - |
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23 | | -int cc_pm_suspend(struct device *dev) |
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| 18 | +static int cc_pm_suspend(struct device *dev) |
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24 | 19 | { |
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25 | 20 | struct cc_drvdata *drvdata = dev_get_drvdata(dev); |
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26 | 21 | |
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27 | 22 | dev_dbg(dev, "set HOST_POWER_DOWN_EN\n"); |
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28 | 23 | fini_cc_regs(drvdata); |
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29 | 24 | cc_iowrite(drvdata, CC_REG(HOST_POWER_DOWN_EN), POWER_DOWN_ENABLE); |
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30 | | - cc_clk_off(drvdata); |
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| 25 | + clk_disable_unprepare(drvdata->clk); |
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31 | 26 | return 0; |
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32 | 27 | } |
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33 | 28 | |
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34 | | -int cc_pm_resume(struct device *dev) |
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| 29 | +static int cc_pm_resume(struct device *dev) |
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35 | 30 | { |
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36 | 31 | int rc; |
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37 | 32 | struct cc_drvdata *drvdata = dev_get_drvdata(dev); |
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38 | 33 | |
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39 | 34 | dev_dbg(dev, "unset HOST_POWER_DOWN_EN\n"); |
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40 | 35 | /* Enables the device source clk */ |
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41 | | - rc = cc_clk_on(drvdata); |
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| 36 | + rc = clk_prepare_enable(drvdata->clk); |
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42 | 37 | if (rc) { |
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43 | 38 | dev_err(dev, "failed getting clock back on. We're toast.\n"); |
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44 | 39 | return rc; |
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| 40 | + } |
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| 41 | + /* wait for Cryptocell reset completion */ |
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| 42 | + if (!cc_wait_for_reset_completion(drvdata)) { |
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| 43 | + dev_err(dev, "Cryptocell reset not completed"); |
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| 44 | + return -EBUSY; |
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45 | 45 | } |
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46 | 46 | |
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47 | 47 | cc_iowrite(drvdata, CC_REG(HOST_POWER_DOWN_EN), POWER_DOWN_DISABLE); |
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.. | .. |
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55 | 55 | |
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56 | 56 | cc_init_hash_sram(drvdata); |
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57 | 57 | |
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58 | | - cc_init_iv_sram(drvdata); |
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59 | 58 | return 0; |
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60 | 59 | } |
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61 | 60 | |
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| 61 | +const struct dev_pm_ops ccree_pm = { |
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| 62 | + SET_RUNTIME_PM_OPS(cc_pm_suspend, cc_pm_resume, NULL) |
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| 63 | +}; |
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| 64 | + |
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62 | 65 | int cc_pm_get(struct device *dev) |
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63 | 66 | { |
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64 | | - int rc = 0; |
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65 | | - struct cc_drvdata *drvdata = dev_get_drvdata(dev); |
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66 | | - |
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67 | | - if (drvdata->pm_on) |
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68 | | - rc = pm_runtime_get_sync(dev); |
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69 | | - |
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70 | | - return (rc == 1 ? 0 : rc); |
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71 | | -} |
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72 | | - |
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73 | | -int cc_pm_put_suspend(struct device *dev) |
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74 | | -{ |
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75 | | - int rc = 0; |
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76 | | - struct cc_drvdata *drvdata = dev_get_drvdata(dev); |
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77 | | - |
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78 | | - if (drvdata->pm_on) { |
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79 | | - pm_runtime_mark_last_busy(dev); |
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80 | | - rc = pm_runtime_put_autosuspend(dev); |
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| 67 | + int rc = pm_runtime_get_sync(dev); |
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| 68 | + if (rc < 0) { |
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| 69 | + pm_runtime_put_noidle(dev); |
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| 70 | + return rc; |
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81 | 71 | } |
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82 | 72 | |
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83 | | - return rc; |
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| 73 | + return 0; |
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84 | 74 | } |
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85 | 75 | |
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86 | | -int cc_pm_init(struct cc_drvdata *drvdata) |
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| 76 | +void cc_pm_put_suspend(struct device *dev) |
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87 | 77 | { |
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88 | | - struct device *dev = drvdata_to_dev(drvdata); |
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89 | | - |
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90 | | - /* must be before the enabling to avoid resdundent suspending */ |
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91 | | - pm_runtime_set_autosuspend_delay(dev, CC_SUSPEND_TIMEOUT); |
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92 | | - pm_runtime_use_autosuspend(dev); |
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93 | | - /* set us as active - note we won't do PM ops until cc_pm_go()! */ |
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94 | | - return pm_runtime_set_active(dev); |
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95 | | -} |
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96 | | - |
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97 | | -/* enable the PM module*/ |
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98 | | -void cc_pm_go(struct cc_drvdata *drvdata) |
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99 | | -{ |
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100 | | - pm_runtime_enable(drvdata_to_dev(drvdata)); |
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101 | | - drvdata->pm_on = true; |
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102 | | -} |
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103 | | - |
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104 | | -void cc_pm_fini(struct cc_drvdata *drvdata) |
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105 | | -{ |
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106 | | - pm_runtime_disable(drvdata_to_dev(drvdata)); |
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107 | | - drvdata->pm_on = false; |
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| 78 | + pm_runtime_mark_last_busy(dev); |
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| 79 | + pm_runtime_put_autosuspend(dev); |
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108 | 80 | } |
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