| Dhaval Patel | 83e27fc | 2013-12-19 14:52:24 -0800 | [diff] [blame^] | 1 | /* Copyright (c) 2013-2014, The Linux Foundation. All rights reserved. |
| 2 | * |
| 3 | * This program is free software; you can redistribute it and/or modify |
| 4 | * it under the terms of the GNU General Public License version 2 and |
| 5 | * only version 2 as published by the Free Software Foundation. |
| 6 | * |
| 7 | * This program is distributed in the hope that it will be useful, |
| 8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 10 | * GNU General Public License for more details. |
| 11 | */ |
| 12 | |
| 13 | #ifndef __MDSS_PLL_H |
| 14 | #define __MDSS_PLL_H |
| 15 | |
| 16 | #include <linux/mdss_io_util.h> |
| 17 | #include <linux/io.h> |
| 18 | |
| 19 | #define MDSS_PLL_REG_W(base, offset, data) \ |
| 20 | writel_relaxed((data), (base) + (offset)) |
| 21 | #define MDSS_PLL_REG_R(base, offset) readl_relaxed((base) + (offset)) |
| 22 | |
| 23 | enum { |
| 24 | MDSS_DSI_PLL, |
| 25 | MDSS_EDP_PLL, |
| 26 | MDSS_HDMI_PLL, |
| 27 | MDSS_UNKNOWN_PLL, |
| 28 | }; |
| 29 | |
| 30 | struct mdss_pll_resources { |
| 31 | |
| 32 | /* Pll specific resources like GPIO, power supply, clocks, etc*/ |
| 33 | struct dss_module_power mp; |
| 34 | |
| 35 | /* dsi/edp/hmdi plls' base register and phy register mapping */ |
| 36 | void __iomem *pll_base; |
| 37 | void __iomem *phy_base; |
| 38 | |
| 39 | /* |
| 40 | * Certain pll's needs to update the same vco rate after resume in |
| 41 | * suspend/resume scenario. Cached the vco rate for such plls. |
| 42 | */ |
| 43 | unsigned long vco_cached_rate; |
| 44 | |
| 45 | /* dsi/edp/hmdi pll interface type */ |
| 46 | u32 pll_interface_type; |
| 47 | |
| 48 | /* |
| 49 | * Keep track to resource status to avoid updating same status for the |
| 50 | * pll from different paths |
| 51 | */ |
| 52 | bool resource_enable; |
| 53 | |
| 54 | /* |
| 55 | * Certain plls' do not allow vco rate update if it is on. Keep track of |
| 56 | * status for them to turn on/off after set rate success. |
| 57 | */ |
| 58 | bool pll_on; |
| 59 | |
| 60 | /* |
| 61 | * handoff_status is true of pll is already enabled by bootloader with |
| 62 | * continuous splash enable case. Clock API will call the handoff API |
| 63 | * to enable the status. It is disabled if continuous splash |
| 64 | * feature is disabled. |
| 65 | */ |
| 66 | bool handoff_resources; |
| 67 | |
| 68 | /* |
| 69 | * Keep reference count of pll resource client to avoid releasing them |
| 70 | * before all clients are finished with their tasks |
| 71 | */ |
| 72 | unsigned int resource_refcount; |
| 73 | |
| 74 | /* Lock status to provide updated resource status to all clients */ |
| 75 | struct mutex resource_lock; |
| 76 | }; |
| 77 | |
| 78 | int mdss_pll_resource_enable(struct mdss_pll_resources *pll_res, bool enable); |
| 79 | int mdss_pll_util_resource_init(struct platform_device *pdev, |
| 80 | struct mdss_pll_resources *pll_res); |
| 81 | void mdss_pll_util_resource_deinit(struct platform_device *pdev, |
| 82 | struct mdss_pll_resources *pll_res); |
| 83 | void mdss_pll_util_resource_release(struct platform_device *pdev, |
| 84 | struct mdss_pll_resources *pll_res); |
| 85 | int mdss_pll_util_resource_enable(struct mdss_pll_resources *pll_res, |
| 86 | bool enable); |
| 87 | int mdss_pll_util_resource_parse(struct platform_device *pdev, |
| 88 | struct mdss_pll_resources *pll_res); |
| 89 | #endif |