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15b4a45238
Create a PHY device that represents the TX PHY and PLL parts of the HDMI block. This makes management of PHY specific resources (regulators and clocks) much easier, and makes the PHY and PLL usable independently. It also simplifies the core HDMI driver, which currently assigns phy ops among many other things. The PHY driver implementation done here is very similar to the PHY driver we already have for DSI. Keep the old hdmi_phy_funcs ops for now. The driver will use these until the HDMI PHY/PLL register offsets aren't considered as separate domains (i.e. their offsets start from 0). The driver doesn't use the common PHY framework for now. This is because it's hard to map our ops with the ops provided by the framework. The bindings used for this is the generic phy bindings. So, this can be adapted to the PHY framework in the future, if possible. Signed-off-by: Archit Taneja <architt@codeaurora.org> Signed-off-by: Rob Clark <robdclark@gmail.com>
120 lines
3.1 KiB
C
120 lines
3.1 KiB
C
/*
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* Copyright (C) 2013 Red Hat
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* Author: Rob Clark <robdclark@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "hdmi.h"
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struct hdmi_phy_8x74 {
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struct hdmi_phy base;
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void __iomem *mmio;
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};
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#define to_hdmi_phy_8x74(x) container_of(x, struct hdmi_phy_8x74, base)
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static void phy_write(struct hdmi_phy_8x74 *phy, u32 reg, u32 data)
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{
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msm_writel(data, phy->mmio + reg);
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}
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//static u32 phy_read(struct hdmi_phy_8x74 *phy, u32 reg)
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//{
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// return msm_readl(phy->mmio + reg);
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//}
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static void hdmi_phy_8x74_destroy(struct hdmi_phy *phy)
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{
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struct hdmi_phy_8x74 *phy_8x74 = to_hdmi_phy_8x74(phy);
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kfree(phy_8x74);
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}
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static void hdmi_phy_8x74_powerup(struct hdmi_phy *phy,
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unsigned long int pixclock)
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{
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struct hdmi_phy_8x74 *phy_8x74 = to_hdmi_phy_8x74(phy);
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phy_write(phy_8x74, REG_HDMI_8x74_ANA_CFG0, 0x1b);
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phy_write(phy_8x74, REG_HDMI_8x74_ANA_CFG1, 0xf2);
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phy_write(phy_8x74, REG_HDMI_8x74_BIST_CFG0, 0x0);
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phy_write(phy_8x74, REG_HDMI_8x74_BIST_PATN0, 0x0);
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phy_write(phy_8x74, REG_HDMI_8x74_BIST_PATN1, 0x0);
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phy_write(phy_8x74, REG_HDMI_8x74_BIST_PATN2, 0x0);
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phy_write(phy_8x74, REG_HDMI_8x74_BIST_PATN3, 0x0);
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phy_write(phy_8x74, REG_HDMI_8x74_PD_CTRL1, 0x20);
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}
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static void hdmi_phy_8x74_powerdown(struct hdmi_phy *phy)
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{
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struct hdmi_phy_8x74 *phy_8x74 = to_hdmi_phy_8x74(phy);
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phy_write(phy_8x74, REG_HDMI_8x74_PD_CTRL0, 0x7f);
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}
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static const struct hdmi_phy_funcs hdmi_phy_8x74_funcs = {
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.destroy = hdmi_phy_8x74_destroy,
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.powerup = hdmi_phy_8x74_powerup,
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.powerdown = hdmi_phy_8x74_powerdown,
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};
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static const char * const hdmi_phy_8x74_reg_names[] = {
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"core-vdda",
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"vddio",
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};
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static const char * const hdmi_phy_8x74_clk_names[] = {
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"iface_clk",
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"alt_iface_clk"
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};
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const struct hdmi_phy_cfg hdmi_phy_8x74_cfg = {
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.type = MSM_HDMI_PHY_8x74,
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.powerup = hdmi_phy_8x74_powerup,
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.powerdown = hdmi_phy_8x74_powerdown,
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.reg_names = hdmi_phy_8x74_reg_names,
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.num_regs = ARRAY_SIZE(hdmi_phy_8x74_reg_names),
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.clk_names = hdmi_phy_8x74_clk_names,
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.num_clks = ARRAY_SIZE(hdmi_phy_8x74_clk_names),
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};
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struct hdmi_phy *hdmi_phy_8x74_init(struct hdmi *hdmi)
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{
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struct hdmi_phy_8x74 *phy_8x74;
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struct hdmi_phy *phy = NULL;
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int ret;
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phy_8x74 = kzalloc(sizeof(*phy_8x74), GFP_KERNEL);
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if (!phy_8x74) {
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ret = -ENOMEM;
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goto fail;
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}
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phy = &phy_8x74->base;
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phy->funcs = &hdmi_phy_8x74_funcs;
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/* for 8x74, the phy mmio is mapped separately: */
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phy_8x74->mmio = msm_ioremap(hdmi->pdev,
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"phy_physical", "HDMI_8x74");
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if (IS_ERR(phy_8x74->mmio)) {
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ret = PTR_ERR(phy_8x74->mmio);
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goto fail;
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}
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return phy;
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fail:
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if (phy)
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hdmi_phy_8x74_destroy(phy);
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return ERR_PTR(ret);
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}
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