1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3  * Copyright (C) 2016 Maxime Ripard
4  *
5  * Maxime Ripard <maxime.ripard@free-electrons.com>
6  */
7 
8 #ifndef _SUN4I_HDMI_H_
9 #define _SUN4I_HDMI_H_
10 
11 #include <drm/drm_connector.h>
12 #include <drm/drm_encoder.h>
13 #include <linux/regmap.h>
14 
15 #include <media/cec-pin.h>
16 
17 #define SUN4I_HDMI_CTRL_REG		0x004
18 #define SUN4I_HDMI_CTRL_ENABLE			BIT(31)
19 
20 #define SUN4I_HDMI_IRQ_REG		0x008
21 #define SUN4I_HDMI_IRQ_STA_MASK			0x73
22 #define SUN4I_HDMI_IRQ_STA_FIFO_OF		BIT(1)
23 #define SUN4I_HDMI_IRQ_STA_FIFO_UF		BIT(0)
24 
25 #define SUN4I_HDMI_HPD_REG		0x00c
26 #define SUN4I_HDMI_HPD_HIGH			BIT(0)
27 
28 #define SUN4I_HDMI_VID_CTRL_REG		0x010
29 #define SUN4I_HDMI_VID_CTRL_ENABLE		BIT(31)
30 #define SUN4I_HDMI_VID_CTRL_HDMI_MODE		BIT(30)
31 
32 #define SUN4I_HDMI_VID_TIMING_ACT_REG	0x014
33 #define SUN4I_HDMI_VID_TIMING_BP_REG	0x018
34 #define SUN4I_HDMI_VID_TIMING_FP_REG	0x01c
35 #define SUN4I_HDMI_VID_TIMING_SPW_REG	0x020
36 
37 #define SUN4I_HDMI_VID_TIMING_X(x)		((((x) - 1) & GENMASK(11, 0)))
38 #define SUN4I_HDMI_VID_TIMING_Y(y)		((((y) - 1) & GENMASK(11, 0)) << 16)
39 
40 #define SUN4I_HDMI_VID_TIMING_POL_REG	0x024
41 #define SUN4I_HDMI_VID_TIMING_POL_TX_CLK        (0x3e0 << 16)
42 #define SUN4I_HDMI_VID_TIMING_POL_VSYNC		BIT(1)
43 #define SUN4I_HDMI_VID_TIMING_POL_HSYNC		BIT(0)
44 
45 #define SUN4I_HDMI_AVI_INFOFRAME_REG(n)	(0x080 + (n))
46 
47 #define SUN4I_HDMI_PAD_CTRL0_REG	0x200
48 #define SUN4I_HDMI_PAD_CTRL0_BIASEN		BIT(31)
49 #define SUN4I_HDMI_PAD_CTRL0_LDOCEN		BIT(30)
50 #define SUN4I_HDMI_PAD_CTRL0_LDODEN		BIT(29)
51 #define SUN4I_HDMI_PAD_CTRL0_PWENC		BIT(28)
52 #define SUN4I_HDMI_PAD_CTRL0_PWEND		BIT(27)
53 #define SUN4I_HDMI_PAD_CTRL0_PWENG		BIT(26)
54 #define SUN4I_HDMI_PAD_CTRL0_CKEN		BIT(25)
55 #define SUN4I_HDMI_PAD_CTRL0_TXEN		BIT(23)
56 
57 #define SUN4I_HDMI_PAD_CTRL1_REG	0x204
58 #define SUN4I_HDMI_PAD_CTRL1_UNKNOWN		BIT(24)	/* set on A31 */
59 #define SUN4I_HDMI_PAD_CTRL1_AMP_OPT		BIT(23)
60 #define SUN4I_HDMI_PAD_CTRL1_AMPCK_OPT		BIT(22)
61 #define SUN4I_HDMI_PAD_CTRL1_EMP_OPT		BIT(20)
62 #define SUN4I_HDMI_PAD_CTRL1_EMPCK_OPT		BIT(19)
63 #define SUN4I_HDMI_PAD_CTRL1_PWSCK		BIT(18)
64 #define SUN4I_HDMI_PAD_CTRL1_PWSDT		BIT(17)
65 #define SUN4I_HDMI_PAD_CTRL1_REG_DEN		BIT(15)
66 #define SUN4I_HDMI_PAD_CTRL1_REG_DENCK		BIT(14)
67 #define SUN4I_HDMI_PAD_CTRL1_REG_EMP(n)		(((n) & 7) << 10)
68 #define SUN4I_HDMI_PAD_CTRL1_HALVE_CLK		BIT(6)
69 #define SUN4I_HDMI_PAD_CTRL1_REG_AMP(n)		(((n) & 7) << 3)
70 
71 /* These bits seem to invert the TMDS data channels */
72 #define SUN4I_HDMI_PAD_CTRL1_INVERT_R		BIT(2)
73 #define SUN4I_HDMI_PAD_CTRL1_INVERT_G		BIT(1)
74 #define SUN4I_HDMI_PAD_CTRL1_INVERT_B		BIT(0)
75 
76 #define SUN4I_HDMI_PLL_CTRL_REG		0x208
77 #define SUN4I_HDMI_PLL_CTRL_PLL_EN		BIT(31)
78 #define SUN4I_HDMI_PLL_CTRL_BWS			BIT(30)
79 #define SUN4I_HDMI_PLL_CTRL_HV_IS_33		BIT(29)
80 #define SUN4I_HDMI_PLL_CTRL_LDO1_EN		BIT(28)
81 #define SUN4I_HDMI_PLL_CTRL_LDO2_EN		BIT(27)
82 #define SUN4I_HDMI_PLL_CTRL_SDIV2		BIT(25)
83 #define SUN4I_HDMI_PLL_CTRL_VCO_GAIN(n)		(((n) & 7) << 20)
84 #define SUN4I_HDMI_PLL_CTRL_S(n)		(((n) & 7) << 17)
85 #define SUN4I_HDMI_PLL_CTRL_CP_S(n)		(((n) & 0x1f) << 12)
86 #define SUN4I_HDMI_PLL_CTRL_CS(n)		(((n) & 0xf) << 8)
87 #define SUN4I_HDMI_PLL_CTRL_DIV(n)		(((n) & 0xf) << 4)
88 #define SUN4I_HDMI_PLL_CTRL_DIV_MASK		GENMASK(7, 4)
89 #define SUN4I_HDMI_PLL_CTRL_VCO_S(n)		((n) & 0xf)
90 
91 #define SUN4I_HDMI_PLL_DBG0_REG		0x20c
92 #define SUN4I_HDMI_PLL_DBG0_TMDS_PARENT(n)	(((n) & 1) << 21)
93 #define SUN4I_HDMI_PLL_DBG0_TMDS_PARENT_MASK	BIT(21)
94 #define SUN4I_HDMI_PLL_DBG0_TMDS_PARENT_SHIFT	21
95 
96 #define SUN4I_HDMI_CEC			0x214
97 #define SUN4I_HDMI_CEC_ENABLE			BIT(11)
98 #define SUN4I_HDMI_CEC_TX			BIT(9)
99 #define SUN4I_HDMI_CEC_RX			BIT(8)
100 
101 #define SUN4I_HDMI_PKT_CTRL_REG(n)	(0x2f0 + (4 * (n)))
102 #define SUN4I_HDMI_PKT_CTRL_TYPE(n, t)		((t) << (((n) % 4) * 4))
103 
104 #define SUN4I_HDMI_UNKNOWN_REG		0x300
105 #define SUN4I_HDMI_UNKNOWN_INPUT_SYNC		BIT(27)
106 
107 #define SUN4I_HDMI_DDC_CTRL_REG		0x500
108 #define SUN4I_HDMI_DDC_CTRL_ENABLE		BIT(31)
109 #define SUN4I_HDMI_DDC_CTRL_START_CMD		BIT(30)
110 #define SUN4I_HDMI_DDC_CTRL_FIFO_DIR_MASK	BIT(8)
111 #define SUN4I_HDMI_DDC_CTRL_FIFO_DIR_WRITE	(1 << 8)
112 #define SUN4I_HDMI_DDC_CTRL_FIFO_DIR_READ	(0 << 8)
113 #define SUN4I_HDMI_DDC_CTRL_RESET		BIT(0)
114 
115 #define SUN4I_HDMI_DDC_ADDR_REG		0x504
116 #define SUN4I_HDMI_DDC_ADDR_SEGMENT(seg)	(((seg) & 0xff) << 24)
117 #define SUN4I_HDMI_DDC_ADDR_EDDC(addr)		(((addr) & 0xff) << 16)
118 #define SUN4I_HDMI_DDC_ADDR_OFFSET(off)		(((off) & 0xff) << 8)
119 #define SUN4I_HDMI_DDC_ADDR_SLAVE(addr)		((addr) & 0xff)
120 
121 #define SUN4I_HDMI_DDC_INT_STATUS_REG		0x50c
122 #define SUN4I_HDMI_DDC_INT_STATUS_ILLEGAL_FIFO_OPERATION	BIT(7)
123 #define SUN4I_HDMI_DDC_INT_STATUS_DDC_RX_FIFO_UNDERFLOW		BIT(6)
124 #define SUN4I_HDMI_DDC_INT_STATUS_DDC_TX_FIFO_OVERFLOW		BIT(5)
125 #define SUN4I_HDMI_DDC_INT_STATUS_FIFO_REQUEST			BIT(4)
126 #define SUN4I_HDMI_DDC_INT_STATUS_ARBITRATION_ERROR		BIT(3)
127 #define SUN4I_HDMI_DDC_INT_STATUS_ACK_ERROR			BIT(2)
128 #define SUN4I_HDMI_DDC_INT_STATUS_BUS_ERROR			BIT(1)
129 #define SUN4I_HDMI_DDC_INT_STATUS_TRANSFER_COMPLETE		BIT(0)
130 
131 #define SUN4I_HDMI_DDC_FIFO_CTRL_REG	0x510
132 #define SUN4I_HDMI_DDC_FIFO_CTRL_CLEAR		BIT(31)
133 #define SUN4I_HDMI_DDC_FIFO_CTRL_RX_THRES(n)	(((n) & 0xf) << 4)
134 #define SUN4I_HDMI_DDC_FIFO_CTRL_RX_THRES_MASK	GENMASK(7, 4)
135 #define SUN4I_HDMI_DDC_FIFO_CTRL_RX_THRES_MAX	(BIT(4) - 1)
136 #define SUN4I_HDMI_DDC_FIFO_CTRL_TX_THRES(n)	((n) & 0xf)
137 #define SUN4I_HDMI_DDC_FIFO_CTRL_TX_THRES_MASK	GENMASK(3, 0)
138 #define SUN4I_HDMI_DDC_FIFO_CTRL_TX_THRES_MAX	(BIT(4) - 1)
139 
140 #define SUN4I_HDMI_DDC_FIFO_DATA_REG	0x518
141 
142 #define SUN4I_HDMI_DDC_BYTE_COUNT_REG	0x51c
143 #define SUN4I_HDMI_DDC_BYTE_COUNT_MAX		(BIT(10) - 1)
144 
145 #define SUN4I_HDMI_DDC_CMD_REG		0x520
146 #define SUN4I_HDMI_DDC_CMD_EXPLICIT_EDDC_READ	6
147 #define SUN4I_HDMI_DDC_CMD_IMPLICIT_READ	5
148 #define SUN4I_HDMI_DDC_CMD_IMPLICIT_WRITE	3
149 
150 #define SUN4I_HDMI_DDC_CLK_REG		0x528
151 #define SUN4I_HDMI_DDC_CLK_M(m)			(((m) & 0xf) << 3)
152 #define SUN4I_HDMI_DDC_CLK_N(n)			((n) & 0x7)
153 
154 #define SUN4I_HDMI_DDC_LINE_CTRL_REG	0x540
155 #define SUN4I_HDMI_DDC_LINE_CTRL_SDA_ENABLE	BIT(9)
156 #define SUN4I_HDMI_DDC_LINE_CTRL_SCL_ENABLE	BIT(8)
157 
158 #define SUN4I_HDMI_DDC_FIFO_SIZE	16
159 
160 /* A31 specific */
161 #define SUN6I_HDMI_DDC_CTRL_REG		0x500
162 #define SUN6I_HDMI_DDC_CTRL_RESET		BIT(31)
163 #define SUN6I_HDMI_DDC_CTRL_START_CMD		BIT(27)
164 #define SUN6I_HDMI_DDC_CTRL_SDA_ENABLE		BIT(6)
165 #define SUN6I_HDMI_DDC_CTRL_SCL_ENABLE		BIT(4)
166 #define SUN6I_HDMI_DDC_CTRL_ENABLE		BIT(0)
167 
168 #define SUN6I_HDMI_DDC_CMD_REG		0x508
169 #define SUN6I_HDMI_DDC_CMD_BYTE_COUNT(count)	((count) << 16)
170 /* command types in lower 3 bits are the same as sun4i */
171 
172 #define SUN6I_HDMI_DDC_ADDR_REG		0x50c
173 #define SUN6I_HDMI_DDC_ADDR_SEGMENT(seg)	(((seg) & 0xff) << 24)
174 #define SUN6I_HDMI_DDC_ADDR_EDDC(addr)		(((addr) & 0xff) << 16)
175 #define SUN6I_HDMI_DDC_ADDR_OFFSET(off)		(((off) & 0xff) << 8)
176 #define SUN6I_HDMI_DDC_ADDR_SLAVE(addr)		(((addr) & 0xff) << 1)
177 
178 #define SUN6I_HDMI_DDC_INT_STATUS_REG	0x514
179 #define SUN6I_HDMI_DDC_INT_STATUS_TIMEOUT	BIT(8)
180 /* lower 8 bits are the same as sun4i */
181 
182 #define SUN6I_HDMI_DDC_FIFO_CTRL_REG	0x518
183 #define SUN6I_HDMI_DDC_FIFO_CTRL_CLEAR		BIT(15)
184 /* lower 9 bits are the same as sun4i */
185 
186 #define SUN6I_HDMI_DDC_CLK_REG		0x520
187 /* DDC CLK bit fields are the same, but the formula is not */
188 
189 #define SUN6I_HDMI_DDC_FIFO_DATA_REG	0x580
190 
191 enum sun4i_hdmi_pkt_type {
192 	SUN4I_HDMI_PKT_AVI = 2,
193 	SUN4I_HDMI_PKT_END = 15,
194 };
195 
196 struct sun4i_hdmi_variant {
197 	bool has_ddc_parent_clk;
198 	bool has_reset_control;
199 
200 	u32 pad_ctrl0_init_val;
201 	u32 pad_ctrl1_init_val;
202 	u32 pll_ctrl_init_val;
203 
204 	struct reg_field ddc_clk_reg;
205 	u8 ddc_clk_pre_divider;
206 	u8 ddc_clk_m_offset;
207 
208 	u8 tmds_clk_div_offset;
209 
210 	/* Register fields for I2C adapter */
211 	struct reg_field	field_ddc_en;
212 	struct reg_field	field_ddc_start;
213 	struct reg_field	field_ddc_reset;
214 	struct reg_field	field_ddc_addr_reg;
215 	struct reg_field	field_ddc_slave_addr;
216 	struct reg_field	field_ddc_int_mask;
217 	struct reg_field	field_ddc_int_status;
218 	struct reg_field	field_ddc_fifo_clear;
219 	struct reg_field	field_ddc_fifo_rx_thres;
220 	struct reg_field	field_ddc_fifo_tx_thres;
221 	struct reg_field	field_ddc_byte_count;
222 	struct reg_field	field_ddc_cmd;
223 	struct reg_field	field_ddc_sda_en;
224 	struct reg_field	field_ddc_sck_en;
225 
226 	/* DDC FIFO register offset */
227 	u32			ddc_fifo_reg;
228 
229 	/*
230 	 * DDC FIFO threshold boundary conditions
231 	 *
232 	 * This is used to cope with the threshold boundary condition
233 	 * being slightly different on sun5i and sun6i.
234 	 *
235 	 * On sun5i the threshold is exclusive, i.e. does not include,
236 	 * the value of the threshold. ( > for RX; < for TX )
237 	 * On sun6i the threshold is inclusive, i.e. includes, the
238 	 * value of the threshold. ( >= for RX; <= for TX )
239 	 */
240 	bool			ddc_fifo_thres_incl;
241 
242 	bool			ddc_fifo_has_dir;
243 };
244 
245 struct sun4i_hdmi {
246 	struct drm_connector	connector;
247 	struct drm_encoder	encoder;
248 	struct device		*dev;
249 
250 	void __iomem		*base;
251 	struct regmap		*regmap;
252 
253 	/* Reset control */
254 	struct reset_control	*reset;
255 
256 	/* Parent clocks */
257 	struct clk		*bus_clk;
258 	struct clk		*mod_clk;
259 	struct clk		*ddc_parent_clk;
260 	struct clk		*pll0_clk;
261 	struct clk		*pll1_clk;
262 
263 	/* And the clocks we create */
264 	struct clk		*ddc_clk;
265 	struct clk		*tmds_clk;
266 
267 	struct i2c_adapter	*i2c;
268 	struct i2c_adapter	*ddc_i2c;
269 
270 	/* Regmap fields for I2C adapter */
271 	struct regmap_field	*field_ddc_en;
272 	struct regmap_field	*field_ddc_start;
273 	struct regmap_field	*field_ddc_reset;
274 	struct regmap_field	*field_ddc_addr_reg;
275 	struct regmap_field	*field_ddc_slave_addr;
276 	struct regmap_field	*field_ddc_int_mask;
277 	struct regmap_field	*field_ddc_int_status;
278 	struct regmap_field	*field_ddc_fifo_clear;
279 	struct regmap_field	*field_ddc_fifo_rx_thres;
280 	struct regmap_field	*field_ddc_fifo_tx_thres;
281 	struct regmap_field	*field_ddc_byte_count;
282 	struct regmap_field	*field_ddc_cmd;
283 	struct regmap_field	*field_ddc_sda_en;
284 	struct regmap_field	*field_ddc_sck_en;
285 
286 	struct sun4i_drv	*drv;
287 
288 	struct cec_adapter	*cec_adap;
289 
290 	const struct sun4i_hdmi_variant	*variant;
291 };
292 
293 int sun4i_ddc_create(struct sun4i_hdmi *hdmi, struct clk *clk);
294 int sun4i_tmds_create(struct sun4i_hdmi *hdmi);
295 int sun4i_hdmi_i2c_create(struct device *dev, struct sun4i_hdmi *hdmi);
296 
297 #endif /* _SUN4I_HDMI_H_ */
298