1 | /** |
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2 | * @file |
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3 | * |
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4 | * @ingroup arm_beagle |
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5 | * |
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6 | * @brief Shared PWMSS module functions used by PWM, eQEP and eCAP (when added). |
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7 | */ |
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8 | |
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9 | /* |
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10 | * SPDX-License-Identifier: BSD-2-Clause |
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11 | * |
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12 | * Copyright (c) 2020, 2021 James Fitzsimons <james.fitzsimons@gmail.com> |
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13 | * |
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14 | * Redistribution and use in source and binary forms, with or without |
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15 | * modification, are permitted provided that the following conditions |
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16 | * are met: |
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17 | * 1. Redistributions of source code must retain the above copyright |
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18 | * notice, this list of conditions and the following disclaimer. |
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19 | * 2. Redistributions in binary form must reproduce the above copyright |
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20 | * notice, this list of conditions and the following disclaimer in the |
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21 | * documentation and/or other materials provided with the distribution. |
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22 | * |
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23 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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24 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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25 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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26 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
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27 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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28 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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29 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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30 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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31 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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32 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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33 | * POSSIBILITY OF SUCH DAMAGE. |
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34 | */ |
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35 | |
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36 | #ifndef LIBBSP_ARM_BEAGLE_PWMSS_H |
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37 | #define LIBBSP_ARM_BEAGLE_PWMSS_H |
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38 | |
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39 | #ifdef __cplusplus |
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40 | extern "C" { |
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41 | #endif /* __cplusplus */ |
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42 | |
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43 | /* The following definitions are bitmasks for the clk control registers for |
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44 | * the PWMSS module clocks. All three modules have the same clock control |
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45 | * hence the EPMSSx to signify these values are consistent across all |
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46 | * EPWMSS instances. */ |
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47 | #define AM335X_CM_PER_EPWMSSx_CLKCTRL_MODULEMODE_ENABLE (0x2u) |
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48 | #define AM335X_CM_PER_EPWMSSx_CLKCTRL_MODULEMODE (0x00000003u) |
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49 | #define AM335X_CM_PER_EPWMSSx_CLKCTRL_IDLEST_FUNC (0x0u) |
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50 | #define AM335X_CM_PER_EPWMSSx_CLKCTRL_IDLEST_SHIFT (0x00000010u) |
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51 | #define AM335X_CM_PER_EPWMSSx_CLKCTRL_IDLEST (0x00030000u) |
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52 | |
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53 | /** |
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54 | * @brief The set of possible PWM subsystem module |
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55 | * |
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56 | * Enumerated type to define various instance of pwm module. |
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57 | */ |
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58 | typedef enum { |
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59 | BBB_PWMSS0 = 0, |
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60 | BBB_PWMSS1, |
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61 | BBB_PWMSS2, |
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62 | BBB_PWMSS_COUNT |
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63 | } BBB_PWMSS; |
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64 | |
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65 | |
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66 | rtems_status_code pwmss_module_clk_config(BBB_PWMSS pwmss_id); |
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67 | |
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68 | #ifdef __cplusplus |
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69 | } |
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70 | #endif /* __cplusplus */ |
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71 | |
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72 | #endif /* LIBBSP_ARM_BEAGLE_PWMSS_H */ |
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