4 * Copyright (C) 2013 Texas Instruments Incorporated
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>
18 #include <video/omapfb_dss.h>
23 struct hdmi_phy_features {
26 unsigned long max_phy;
29 static const struct hdmi_phy_features *phy_feat;
31 void hdmi_phy_dump(struct hdmi_phy_data *phy, struct seq_file *s)
33 #define DUMPPHY(r) seq_printf(s, "%-35s %08x\n", #r,\
34 hdmi_read_reg(phy->base, r))
36 DUMPPHY(HDMI_TXPHY_TX_CTRL);
37 DUMPPHY(HDMI_TXPHY_DIGITAL_CTRL);
38 DUMPPHY(HDMI_TXPHY_POWER_CTRL);
39 DUMPPHY(HDMI_TXPHY_PAD_CFG_CTRL);
40 if (phy_feat->bist_ctrl)
41 DUMPPHY(HDMI_TXPHY_BIST_CONTROL);
44 int hdmi_phy_parse_lanes(struct hdmi_phy_data *phy, const u32 *lanes)
48 for (i = 0; i < 8; i += 2) {
55 if (dx < 0 || dx >= 8)
58 if (dy < 0 || dy >= 8)
73 phy->lane_function[lane] = i / 2;
74 phy->lane_polarity[lane] = pol;
80 static void hdmi_phy_configure_lanes(struct hdmi_phy_data *phy)
82 static const u16 pad_cfg_list[] = {
111 unsigned lane_cfg_val;
114 for (i = 0; i < 4; ++i)
115 lane_cfg |= phy->lane_function[i] << ((3 - i) * 4);
117 pol_val |= phy->lane_polarity[0] << 0;
118 pol_val |= phy->lane_polarity[1] << 3;
119 pol_val |= phy->lane_polarity[2] << 2;
120 pol_val |= phy->lane_polarity[3] << 1;
122 for (i = 0; i < ARRAY_SIZE(pad_cfg_list); ++i)
123 if (pad_cfg_list[i] == lane_cfg)
126 if (WARN_ON(i == ARRAY_SIZE(pad_cfg_list)))
131 REG_FLD_MOD(phy->base, HDMI_TXPHY_PAD_CFG_CTRL, lane_cfg_val, 26, 22);
132 REG_FLD_MOD(phy->base, HDMI_TXPHY_PAD_CFG_CTRL, pol_val, 30, 27);
135 int hdmi_phy_configure(struct hdmi_phy_data *phy, unsigned long hfbitclk,
136 unsigned long lfbitclk)
141 * Read address 0 in order to get the SCP reset done completed
142 * Dummy access performed to make sure reset is done
144 hdmi_read_reg(phy->base, HDMI_TXPHY_TX_CTRL);
147 * In OMAP5+, the HFBITCLK must be divided by 2 before issuing the
148 * HDMI_PHYPWRCMD_LDOON command.
150 if (phy_feat->bist_ctrl)
151 REG_FLD_MOD(phy->base, HDMI_TXPHY_BIST_CONTROL, 1, 11, 11);
154 * If the hfbitclk != lfbitclk, it means the lfbitclk was configured
155 * to be used for TMDS.
157 if (hfbitclk != lfbitclk)
159 else if (hfbitclk / 10 < phy_feat->max_phy)
165 * Write to phy address 0 to configure the clock
166 * use HFBITCLK write HDMI_TXPHY_TX_CONTROL_FREQOUT field
168 REG_FLD_MOD(phy->base, HDMI_TXPHY_TX_CTRL, freqout, 31, 30);
170 /* Write to phy address 1 to start HDMI line (TXVALID and TMDSCLKEN) */
171 hdmi_write_reg(phy->base, HDMI_TXPHY_DIGITAL_CTRL, 0xF0000000);
173 /* Setup max LDO voltage */
174 if (phy_feat->ldo_voltage)
175 REG_FLD_MOD(phy->base, HDMI_TXPHY_POWER_CTRL, 0xB, 3, 0);
177 hdmi_phy_configure_lanes(phy);
182 static const struct hdmi_phy_features omap44xx_phy_feats = {
185 .max_phy = 185675000,
188 static const struct hdmi_phy_features omap54xx_phy_feats = {
190 .ldo_voltage = false,
191 .max_phy = 186000000,
194 static const struct hdmi_phy_features *hdmi_phy_get_features(void)
196 switch (omapdss_get_version()) {
197 case OMAPDSS_VER_OMAP4430_ES1:
198 case OMAPDSS_VER_OMAP4430_ES2:
199 case OMAPDSS_VER_OMAP4:
200 return &omap44xx_phy_feats;
202 case OMAPDSS_VER_OMAP5:
203 case OMAPDSS_VER_DRA7xx:
204 return &omap54xx_phy_feats;
211 int hdmi_phy_init(struct platform_device *pdev, struct hdmi_phy_data *phy)
213 struct resource *res;
215 phy_feat = hdmi_phy_get_features();
219 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "phy");
221 DSSERR("can't get PHY mem resource\n");
225 phy->base = devm_ioremap_resource(&pdev->dev, res);
226 if (IS_ERR(phy->base)) {
227 DSSERR("can't ioremap TX PHY\n");
228 return PTR_ERR(phy->base);