4 * Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com/
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 as published by
8 * the Free Software Foundation.
11 #include <linux/kernel.h>
12 #include <linux/err.h>
14 #include <linux/platform_device.h>
15 #include <linux/slab.h>
16 #include <linux/seq_file.h>
22 void hdmi_phy_dump(struct hdmi_phy_data *phy, struct seq_file *s)
24 #define DUMPPHY(r) seq_printf(s, "%-35s %08x\n", #r,\
25 hdmi_read_reg(phy->base, r))
27 DUMPPHY(HDMI_TXPHY_TX_CTRL);
28 DUMPPHY(HDMI_TXPHY_DIGITAL_CTRL);
29 DUMPPHY(HDMI_TXPHY_POWER_CTRL);
30 DUMPPHY(HDMI_TXPHY_PAD_CFG_CTRL);
31 if (phy->features->bist_ctrl)
32 DUMPPHY(HDMI_TXPHY_BIST_CONTROL);
35 int hdmi_phy_parse_lanes(struct hdmi_phy_data *phy, const u32 *lanes)
39 for (i = 0; i < 8; i += 2) {
46 if (dx < 0 || dx >= 8)
49 if (dy < 0 || dy >= 8)
64 phy->lane_function[lane] = i / 2;
65 phy->lane_polarity[lane] = pol;
71 static void hdmi_phy_configure_lanes(struct hdmi_phy_data *phy)
73 static const u16 pad_cfg_list[] = {
102 unsigned int lane_cfg_val;
105 for (i = 0; i < 4; ++i)
106 lane_cfg |= phy->lane_function[i] << ((3 - i) * 4);
108 pol_val |= phy->lane_polarity[0] << 0;
109 pol_val |= phy->lane_polarity[1] << 3;
110 pol_val |= phy->lane_polarity[2] << 2;
111 pol_val |= phy->lane_polarity[3] << 1;
113 for (i = 0; i < ARRAY_SIZE(pad_cfg_list); ++i)
114 if (pad_cfg_list[i] == lane_cfg)
117 if (WARN_ON(i == ARRAY_SIZE(pad_cfg_list)))
122 REG_FLD_MOD(phy->base, HDMI_TXPHY_PAD_CFG_CTRL, lane_cfg_val, 26, 22);
123 REG_FLD_MOD(phy->base, HDMI_TXPHY_PAD_CFG_CTRL, pol_val, 30, 27);
126 int hdmi_phy_configure(struct hdmi_phy_data *phy, unsigned long hfbitclk,
127 unsigned long lfbitclk)
132 * Read address 0 in order to get the SCP reset done completed
133 * Dummy access performed to make sure reset is done
135 hdmi_read_reg(phy->base, HDMI_TXPHY_TX_CTRL);
138 * In OMAP5+, the HFBITCLK must be divided by 2 before issuing the
139 * HDMI_PHYPWRCMD_LDOON command.
141 if (phy->features->bist_ctrl)
142 REG_FLD_MOD(phy->base, HDMI_TXPHY_BIST_CONTROL, 1, 11, 11);
145 * If the hfbitclk != lfbitclk, it means the lfbitclk was configured
146 * to be used for TMDS.
148 if (hfbitclk != lfbitclk)
150 else if (hfbitclk / 10 < phy->features->max_phy)
156 * Write to phy address 0 to configure the clock
157 * use HFBITCLK write HDMI_TXPHY_TX_CONTROL_FREQOUT field
159 REG_FLD_MOD(phy->base, HDMI_TXPHY_TX_CTRL, freqout, 31, 30);
161 /* Write to phy address 1 to start HDMI line (TXVALID and TMDSCLKEN) */
162 hdmi_write_reg(phy->base, HDMI_TXPHY_DIGITAL_CTRL, 0xF0000000);
164 /* Setup max LDO voltage */
165 if (phy->features->ldo_voltage)
166 REG_FLD_MOD(phy->base, HDMI_TXPHY_POWER_CTRL, 0xB, 3, 0);
168 hdmi_phy_configure_lanes(phy);
173 static const struct hdmi_phy_features omap44xx_phy_feats = {
176 .max_phy = 185675000,
179 static const struct hdmi_phy_features omap54xx_phy_feats = {
181 .ldo_voltage = false,
182 .max_phy = 186000000,
185 int hdmi_phy_init(struct platform_device *pdev, struct hdmi_phy_data *phy,
186 unsigned int version)
188 struct resource *res;
191 phy->features = &omap44xx_phy_feats;
193 phy->features = &omap54xx_phy_feats;
195 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "phy");
196 phy->base = devm_ioremap_resource(&pdev->dev, res);
197 if (IS_ERR(phy->base))
198 return PTR_ERR(phy->base);