drivers/gpu/drm/sun4i/sun4i_hdmi.h

   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         bool                    hdmi_monitor;
 289         struct cec_adapter      *cec_adap;
 290
 291         const struct sun4i_hdmi_variant *variant;
 292 };
 293
 294 int sun4i_ddc_create(struct sun4i_hdmi *hdmi, struct clk *clk);
 295 int sun4i_tmds_create(struct sun4i_hdmi *hdmi);
 296 int sun4i_hdmi_i2c_create(struct device *dev, struct sun4i_hdmi *hdmi);
 297
 298 #endif /* _SUN4I_HDMI_H_ */