drivers/gpu/drm/msm/hdmi/hdmi_phy_8x74.c

   1 /*
   2  * Copyright (C) 2013 Red Hat
   3  * Author: Rob Clark <robdclark@gmail.com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 as published by
   7  * the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #include "hdmi.h"
  19
  20 struct hdmi_phy_8x74 {
  21         struct hdmi_phy base;
  22         void __iomem *mmio;
  23 };
  24 #define to_hdmi_phy_8x74(x) container_of(x, struct hdmi_phy_8x74, base)
  25
  26
  27 static void phy_write(struct hdmi_phy_8x74 *phy, u32 reg, u32 data)
  28 {
  29         msm_writel(data, phy->mmio + reg);
  30 }
  31
  32 //static u32 phy_read(struct hdmi_phy_8x74 *phy, u32 reg)
  33 //{
  34 //      return msm_readl(phy->mmio + reg);
  35 //}
  36
  37 static void hdmi_phy_8x74_destroy(struct hdmi_phy *phy)
  38 {
  39         struct hdmi_phy_8x74 *phy_8x74 = to_hdmi_phy_8x74(phy);
  40         kfree(phy_8x74);
  41 }
  42
  43 static void hdmi_phy_8x74_powerup(struct hdmi_phy *phy,
  44                 unsigned long int pixclock)
  45 {
  46         struct hdmi_phy_8x74 *phy_8x74 = to_hdmi_phy_8x74(phy);
  47
  48         phy_write(phy_8x74, REG_HDMI_8x74_ANA_CFG0,   0x1b);
  49         phy_write(phy_8x74, REG_HDMI_8x74_ANA_CFG1,   0xf2);
  50         phy_write(phy_8x74, REG_HDMI_8x74_BIST_CFG0,  0x0);
  51         phy_write(phy_8x74, REG_HDMI_8x74_BIST_PATN0, 0x0);
  52         phy_write(phy_8x74, REG_HDMI_8x74_BIST_PATN1, 0x0);
  53         phy_write(phy_8x74, REG_HDMI_8x74_BIST_PATN2, 0x0);
  54         phy_write(phy_8x74, REG_HDMI_8x74_BIST_PATN3, 0x0);
  55         phy_write(phy_8x74, REG_HDMI_8x74_PD_CTRL1,   0x20);
  56 }
  57
  58 static void hdmi_phy_8x74_powerdown(struct hdmi_phy *phy)
  59 {
  60         struct hdmi_phy_8x74 *phy_8x74 = to_hdmi_phy_8x74(phy);
  61         phy_write(phy_8x74, REG_HDMI_8x74_PD_CTRL0, 0x7f);
  62 }
  63
  64 static const struct hdmi_phy_funcs hdmi_phy_8x74_funcs = {
  65                 .destroy = hdmi_phy_8x74_destroy,
  66                 .powerup = hdmi_phy_8x74_powerup,
  67                 .powerdown = hdmi_phy_8x74_powerdown,
  68 };
  69
  70 struct hdmi_phy *hdmi_phy_8x74_init(struct hdmi *hdmi)
  71 {
  72         struct hdmi_phy_8x74 *phy_8x74;
  73         struct hdmi_phy *phy = NULL;
  74         int ret;
  75
  76         phy_8x74 = kzalloc(sizeof(*phy_8x74), GFP_KERNEL);
  77         if (!phy_8x74) {
  78                 ret = -ENOMEM;
  79                 goto fail;
  80         }
  81
  82         phy = &phy_8x74->base;
  83
  84         phy->funcs = &hdmi_phy_8x74_funcs;
  85
  86         /* for 8x74, the phy mmio is mapped separately: */
  87         phy_8x74->mmio = msm_ioremap(hdmi->pdev,
  88                         "phy_physical", "HDMI_8x74");
  89         if (IS_ERR(phy_8x74->mmio)) {
  90                 ret = PTR_ERR(phy_8x74->mmio);
  91                 goto fail;
  92         }
  93
  94         return phy;
  95
  96 fail:
  97         if (phy)
  98                 hdmi_phy_8x74_destroy(phy);
  99         return ERR_PTR(ret);
 100 }