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6#include "phy-mtk-mipi-dsi.h"
7
8inline struct mtk_mipi_tx *mtk_mipi_tx_from_clk_hw(struct clk_hw *hw)
9{
10 return container_of(hw, struct mtk_mipi_tx, pll_hw);
11}
12
13void mtk_mipi_tx_clear_bits(struct mtk_mipi_tx *mipi_tx, u32 offset,
14 u32 bits)
15{
16 u32 temp = readl(mipi_tx->regs + offset);
17
18 writel(temp & ~bits, mipi_tx->regs + offset);
19}
20
21void mtk_mipi_tx_set_bits(struct mtk_mipi_tx *mipi_tx, u32 offset,
22 u32 bits)
23{
24 u32 temp = readl(mipi_tx->regs + offset);
25
26 writel(temp | bits, mipi_tx->regs + offset);
27}
28
29void mtk_mipi_tx_update_bits(struct mtk_mipi_tx *mipi_tx, u32 offset,
30 u32 mask, u32 data)
31{
32 u32 temp = readl(mipi_tx->regs + offset);
33
34 writel((temp & ~mask) | (data & mask), mipi_tx->regs + offset);
35}
36
37int mtk_mipi_tx_pll_set_rate(struct clk_hw *hw, unsigned long rate,
38 unsigned long parent_rate)
39{
40 struct mtk_mipi_tx *mipi_tx = mtk_mipi_tx_from_clk_hw(hw);
41
42 dev_dbg(mipi_tx->dev, "set rate: %lu Hz\n", rate);
43
44 mipi_tx->data_rate = rate;
45
46 return 0;
47}
48
49unsigned long mtk_mipi_tx_pll_recalc_rate(struct clk_hw *hw,
50 unsigned long parent_rate)
51{
52 struct mtk_mipi_tx *mipi_tx = mtk_mipi_tx_from_clk_hw(hw);
53
54 return mipi_tx->data_rate;
55}
56
57static int mtk_mipi_tx_power_on(struct phy *phy)
58{
59 struct mtk_mipi_tx *mipi_tx = phy_get_drvdata(phy);
60 int ret;
61
62
63 ret = clk_prepare_enable(mipi_tx->pll);
64 if (ret < 0)
65 return ret;
66
67
68 mipi_tx->driver_data->mipi_tx_enable_signal(phy);
69 return 0;
70}
71
72static int mtk_mipi_tx_power_off(struct phy *phy)
73{
74 struct mtk_mipi_tx *mipi_tx = phy_get_drvdata(phy);
75
76
77 mipi_tx->driver_data->mipi_tx_disable_signal(phy);
78
79
80 clk_disable_unprepare(mipi_tx->pll);
81
82 return 0;
83}
84
85static const struct phy_ops mtk_mipi_tx_ops = {
86 .power_on = mtk_mipi_tx_power_on,
87 .power_off = mtk_mipi_tx_power_off,
88 .owner = THIS_MODULE,
89};
90
91static void mtk_mipi_tx_get_calibration_datal(struct mtk_mipi_tx *mipi_tx)
92{
93 struct nvmem_cell *cell;
94 size_t len;
95 u32 *buf;
96
97 cell = nvmem_cell_get(mipi_tx->dev, "calibration-data");
98 if (IS_ERR(cell)) {
99 dev_info(mipi_tx->dev, "can't get nvmem_cell_get, ignore it\n");
100 return;
101 }
102 buf = (u32 *)nvmem_cell_read(cell, &len);
103 nvmem_cell_put(cell);
104
105 if (IS_ERR(buf)) {
106 dev_info(mipi_tx->dev, "can't get data, ignore it\n");
107 return;
108 }
109
110 if (len < 3 * sizeof(u32)) {
111 dev_info(mipi_tx->dev, "invalid calibration data\n");
112 kfree(buf);
113 return;
114 }
115
116 mipi_tx->rt_code[0] = ((buf[0] >> 6 & 0x1f) << 5) |
117 (buf[0] >> 11 & 0x1f);
118 mipi_tx->rt_code[1] = ((buf[1] >> 27 & 0x1f) << 5) |
119 (buf[0] >> 1 & 0x1f);
120 mipi_tx->rt_code[2] = ((buf[1] >> 17 & 0x1f) << 5) |
121 (buf[1] >> 22 & 0x1f);
122 mipi_tx->rt_code[3] = ((buf[1] >> 7 & 0x1f) << 5) |
123 (buf[1] >> 12 & 0x1f);
124 mipi_tx->rt_code[4] = ((buf[2] >> 27 & 0x1f) << 5) |
125 (buf[1] >> 2 & 0x1f);
126 kfree(buf);
127}
128
129static int mtk_mipi_tx_probe(struct platform_device *pdev)
130{
131 struct device *dev = &pdev->dev;
132 struct mtk_mipi_tx *mipi_tx;
133 struct resource *mem;
134 const char *ref_clk_name;
135 struct clk *ref_clk;
136 struct clk_init_data clk_init = {
137 .num_parents = 1,
138 .parent_names = (const char * const *)&ref_clk_name,
139 .flags = CLK_SET_RATE_GATE,
140 };
141 struct phy *phy;
142 struct phy_provider *phy_provider;
143 int ret;
144
145 mipi_tx = devm_kzalloc(dev, sizeof(*mipi_tx), GFP_KERNEL);
146 if (!mipi_tx)
147 return -ENOMEM;
148
149 mipi_tx->driver_data = of_device_get_match_data(dev);
150
151 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
152 mipi_tx->regs = devm_ioremap_resource(dev, mem);
153 if (IS_ERR(mipi_tx->regs)) {
154 ret = PTR_ERR(mipi_tx->regs);
155 dev_err(dev, "Failed to get memory resource: %d\n", ret);
156 return ret;
157 }
158
159 ref_clk = devm_clk_get(dev, NULL);
160 if (IS_ERR(ref_clk)) {
161 ret = PTR_ERR(ref_clk);
162 dev_err(dev, "Failed to get reference clock: %d\n", ret);
163 return ret;
164 }
165
166 ret = of_property_read_u32(dev->of_node, "drive-strength-microamp",
167 &mipi_tx->mipitx_drive);
168
169 if (ret < 0)
170 mipi_tx->mipitx_drive = 4600;
171
172
173 if (mipi_tx->mipitx_drive > 6000 || mipi_tx->mipitx_drive < 3000) {
174 dev_warn(dev, "drive-strength-microamp is invalid %d, not in 3000 ~ 6000\n",
175 mipi_tx->mipitx_drive);
176 mipi_tx->mipitx_drive = clamp_val(mipi_tx->mipitx_drive, 3000,
177 6000);
178 }
179
180 ref_clk_name = __clk_get_name(ref_clk);
181
182 ret = of_property_read_string(dev->of_node, "clock-output-names",
183 &clk_init.name);
184 if (ret < 0) {
185 dev_err(dev, "Failed to read clock-output-names: %d\n", ret);
186 return ret;
187 }
188
189 clk_init.ops = mipi_tx->driver_data->mipi_tx_clk_ops;
190
191 mipi_tx->pll_hw.init = &clk_init;
192 mipi_tx->pll = devm_clk_register(dev, &mipi_tx->pll_hw);
193 if (IS_ERR(mipi_tx->pll)) {
194 ret = PTR_ERR(mipi_tx->pll);
195 dev_err(dev, "Failed to register PLL: %d\n", ret);
196 return ret;
197 }
198
199 phy = devm_phy_create(dev, NULL, &mtk_mipi_tx_ops);
200 if (IS_ERR(phy)) {
201 ret = PTR_ERR(phy);
202 dev_err(dev, "Failed to create MIPI D-PHY: %d\n", ret);
203 return ret;
204 }
205 phy_set_drvdata(phy, mipi_tx);
206
207 phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
208 if (IS_ERR(phy_provider)) {
209 ret = PTR_ERR(phy_provider);
210 return ret;
211 }
212
213 mipi_tx->dev = dev;
214
215 mtk_mipi_tx_get_calibration_datal(mipi_tx);
216
217 return of_clk_add_provider(dev->of_node, of_clk_src_simple_get,
218 mipi_tx->pll);
219}
220
221static int mtk_mipi_tx_remove(struct platform_device *pdev)
222{
223 of_clk_del_provider(pdev->dev.of_node);
224 return 0;
225}
226
227static const struct of_device_id mtk_mipi_tx_match[] = {
228 { .compatible = "mediatek,mt2701-mipi-tx",
229 .data = &mt2701_mipitx_data },
230 { .compatible = "mediatek,mt8173-mipi-tx",
231 .data = &mt8173_mipitx_data },
232 { .compatible = "mediatek,mt8183-mipi-tx",
233 .data = &mt8183_mipitx_data },
234 { },
235};
236MODULE_DEVICE_TABLE(of, mtk_mipi_tx_match);
237
238static struct platform_driver mtk_mipi_tx_driver = {
239 .probe = mtk_mipi_tx_probe,
240 .remove = mtk_mipi_tx_remove,
241 .driver = {
242 .name = "mediatek-mipi-tx",
243 .of_match_table = mtk_mipi_tx_match,
244 },
245};
246module_platform_driver(mtk_mipi_tx_driver);
247
248MODULE_DESCRIPTION("MediaTek MIPI TX Driver");
249MODULE_LICENSE("GPL v2");
250
