Loading...
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
191enum sun4i_hdmi_pkt_type {
192 SUN4I_HDMI_PKT_AVI = 2,
193 SUN4I_HDMI_PKT_END = 15,
194};
195
196struct 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
245struct 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
293int sun4i_ddc_create(struct sun4i_hdmi *hdmi, struct clk *clk);
294int sun4i_tmds_create(struct sun4i_hdmi *hdmi);
295int sun4i_hdmi_i2c_create(struct device *dev, struct sun4i_hdmi *hdmi);
296
297#endif /* _SUN4I_HDMI_H_ */