1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Copyright (c) 2015, The Linux Foundation. All rights reserved.
4  */
5 
6 #include "dsi_phy.h"
7 #include "dsi.xml.h"
8 #include "dsi_phy_20nm.xml.h"
9 
10 static void dsi_20nm_dphy_set_timing(struct msm_dsi_phy *phy,
11 		struct msm_dsi_dphy_timing *timing)
12 {
13 	void __iomem *base = phy->base;
14 
15 	dsi_phy_write(base + REG_DSI_20nm_PHY_TIMING_CTRL_0,
16 		DSI_20nm_PHY_TIMING_CTRL_0_CLK_ZERO(timing->clk_zero));
17 	dsi_phy_write(base + REG_DSI_20nm_PHY_TIMING_CTRL_1,
18 		DSI_20nm_PHY_TIMING_CTRL_1_CLK_TRAIL(timing->clk_trail));
19 	dsi_phy_write(base + REG_DSI_20nm_PHY_TIMING_CTRL_2,
20 		DSI_20nm_PHY_TIMING_CTRL_2_CLK_PREPARE(timing->clk_prepare));
21 	if (timing->clk_zero & BIT(8))
22 		dsi_phy_write(base + REG_DSI_20nm_PHY_TIMING_CTRL_3,
23 			DSI_20nm_PHY_TIMING_CTRL_3_CLK_ZERO_8);
24 	dsi_phy_write(base + REG_DSI_20nm_PHY_TIMING_CTRL_4,
25 		DSI_20nm_PHY_TIMING_CTRL_4_HS_EXIT(timing->hs_exit));
26 	dsi_phy_write(base + REG_DSI_20nm_PHY_TIMING_CTRL_5,
27 		DSI_20nm_PHY_TIMING_CTRL_5_HS_ZERO(timing->hs_zero));
28 	dsi_phy_write(base + REG_DSI_20nm_PHY_TIMING_CTRL_6,
29 		DSI_20nm_PHY_TIMING_CTRL_6_HS_PREPARE(timing->hs_prepare));
30 	dsi_phy_write(base + REG_DSI_20nm_PHY_TIMING_CTRL_7,
31 		DSI_20nm_PHY_TIMING_CTRL_7_HS_TRAIL(timing->hs_trail));
32 	dsi_phy_write(base + REG_DSI_20nm_PHY_TIMING_CTRL_8,
33 		DSI_20nm_PHY_TIMING_CTRL_8_HS_RQST(timing->hs_rqst));
34 	dsi_phy_write(base + REG_DSI_20nm_PHY_TIMING_CTRL_9,
35 		DSI_20nm_PHY_TIMING_CTRL_9_TA_GO(timing->ta_go) |
36 		DSI_20nm_PHY_TIMING_CTRL_9_TA_SURE(timing->ta_sure));
37 	dsi_phy_write(base + REG_DSI_20nm_PHY_TIMING_CTRL_10,
38 		DSI_20nm_PHY_TIMING_CTRL_10_TA_GET(timing->ta_get));
39 	dsi_phy_write(base + REG_DSI_20nm_PHY_TIMING_CTRL_11,
40 		DSI_20nm_PHY_TIMING_CTRL_11_TRIG3_CMD(0));
41 }
42 
43 static void dsi_20nm_phy_regulator_ctrl(struct msm_dsi_phy *phy, bool enable)
44 {
45 	void __iomem *base = phy->reg_base;
46 
47 	if (!enable) {
48 		dsi_phy_write(base + REG_DSI_20nm_PHY_REGULATOR_CAL_PWR_CFG, 0);
49 		return;
50 	}
51 
52 	if (phy->regulator_ldo_mode) {
53 		dsi_phy_write(phy->base + REG_DSI_20nm_PHY_LDO_CNTRL, 0x1d);
54 		return;
55 	}
56 
57 	/* non LDO mode */
58 	dsi_phy_write(base + REG_DSI_20nm_PHY_REGULATOR_CTRL_1, 0x03);
59 	dsi_phy_write(base + REG_DSI_20nm_PHY_REGULATOR_CTRL_2, 0x03);
60 	dsi_phy_write(base + REG_DSI_20nm_PHY_REGULATOR_CTRL_3, 0x00);
61 	dsi_phy_write(base + REG_DSI_20nm_PHY_REGULATOR_CTRL_4, 0x20);
62 	dsi_phy_write(base + REG_DSI_20nm_PHY_REGULATOR_CAL_PWR_CFG, 0x01);
63 	dsi_phy_write(phy->base + REG_DSI_20nm_PHY_LDO_CNTRL, 0x00);
64 	dsi_phy_write(base + REG_DSI_20nm_PHY_REGULATOR_CTRL_0, 0x03);
65 }
66 
67 static int dsi_20nm_phy_enable(struct msm_dsi_phy *phy,
68 				struct msm_dsi_phy_clk_request *clk_req)
69 {
70 	struct msm_dsi_dphy_timing *timing = &phy->timing;
71 	int i;
72 	void __iomem *base = phy->base;
73 	u32 cfg_4[4] = {0x20, 0x40, 0x20, 0x00};
74 	u32 val;
75 
76 	DBG("");
77 
78 	if (msm_dsi_dphy_timing_calc(timing, clk_req)) {
79 		DRM_DEV_ERROR(&phy->pdev->dev,
80 			"%s: D-PHY timing calculation failed\n", __func__);
81 		return -EINVAL;
82 	}
83 
84 	dsi_20nm_phy_regulator_ctrl(phy, true);
85 
86 	dsi_phy_write(base + REG_DSI_20nm_PHY_STRENGTH_0, 0xff);
87 
88 	val = dsi_phy_read(base + REG_DSI_20nm_PHY_GLBL_TEST_CTRL);
89 	if (phy->id == DSI_1 && phy->usecase == MSM_DSI_PHY_STANDALONE)
90 		val |= DSI_20nm_PHY_GLBL_TEST_CTRL_BITCLK_HS_SEL;
91 	else
92 		val &= ~DSI_20nm_PHY_GLBL_TEST_CTRL_BITCLK_HS_SEL;
93 	dsi_phy_write(base + REG_DSI_20nm_PHY_GLBL_TEST_CTRL, val);
94 
95 	for (i = 0; i < 4; i++) {
96 		dsi_phy_write(base + REG_DSI_20nm_PHY_LN_CFG_3(i),
97 							(i >> 1) * 0x40);
98 		dsi_phy_write(base + REG_DSI_20nm_PHY_LN_TEST_STR_0(i), 0x01);
99 		dsi_phy_write(base + REG_DSI_20nm_PHY_LN_TEST_STR_1(i), 0x46);
100 		dsi_phy_write(base + REG_DSI_20nm_PHY_LN_CFG_0(i), 0x02);
101 		dsi_phy_write(base + REG_DSI_20nm_PHY_LN_CFG_1(i), 0xa0);
102 		dsi_phy_write(base + REG_DSI_20nm_PHY_LN_CFG_4(i), cfg_4[i]);
103 	}
104 
105 	dsi_phy_write(base + REG_DSI_20nm_PHY_LNCK_CFG_3, 0x80);
106 	dsi_phy_write(base + REG_DSI_20nm_PHY_LNCK_TEST_STR0, 0x01);
107 	dsi_phy_write(base + REG_DSI_20nm_PHY_LNCK_TEST_STR1, 0x46);
108 	dsi_phy_write(base + REG_DSI_20nm_PHY_LNCK_CFG_0, 0x00);
109 	dsi_phy_write(base + REG_DSI_20nm_PHY_LNCK_CFG_1, 0xa0);
110 	dsi_phy_write(base + REG_DSI_20nm_PHY_LNCK_CFG_2, 0x00);
111 	dsi_phy_write(base + REG_DSI_20nm_PHY_LNCK_CFG_4, 0x00);
112 
113 	dsi_20nm_dphy_set_timing(phy, timing);
114 
115 	dsi_phy_write(base + REG_DSI_20nm_PHY_CTRL_1, 0x00);
116 
117 	dsi_phy_write(base + REG_DSI_20nm_PHY_STRENGTH_1, 0x06);
118 
119 	/* make sure everything is written before enable */
120 	wmb();
121 	dsi_phy_write(base + REG_DSI_20nm_PHY_CTRL_0, 0x7f);
122 
123 	return 0;
124 }
125 
126 static void dsi_20nm_phy_disable(struct msm_dsi_phy *phy)
127 {
128 	dsi_phy_write(phy->base + REG_DSI_20nm_PHY_CTRL_0, 0);
129 	dsi_20nm_phy_regulator_ctrl(phy, false);
130 }
131 
132 const struct msm_dsi_phy_cfg dsi_phy_20nm_cfgs = {
133 	.has_phy_regulator = true,
134 	.reg_cfg = {
135 		.num = 2,
136 		.regs = {
137 			{"vddio", 100000, 100},	/* 1.8 V */
138 			{"vcca", 10000, 100},	/* 1.0 V */
139 		},
140 	},
141 	.ops = {
142 		.enable = dsi_20nm_phy_enable,
143 		.disable = dsi_20nm_phy_disable,
144 	},
145 	.io_start = { 0xfd998500, 0xfd9a0500 },
146 	.num_dsi_phy = 2,
147 };
148 
149