drivers/clk/bcm/clk-cygnus.c

   1 /*
   2  * Copyright (C) 2014 Broadcom Corporation
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License as
   6  * published by the Free Software Foundation version 2.
   7  *
   8  * This program is distributed "as is" WITHOUT ANY WARRANTY of any
   9  * kind, whether express or implied; without even the implied warranty
  10  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  */
  13
  14 #include <linux/kernel.h>
  15 #include <linux/err.h>
  16 #include <linux/clk-provider.h>
  17 #include <linux/io.h>
  18 #include <linux/of.h>
  19 #include <linux/clkdev.h>
  20 #include <linux/of_address.h>
  21 #include <linux/delay.h>
  22
  23 #include <dt-bindings/clock/bcm-cygnus.h>
  24 #include "clk-iproc.h"
  25
  26 #define REG_VAL(o, s, w) { .offset = o, .shift = s, .width = w, }
  27
  28 #define AON_VAL(o, pw, ps, is) { .offset = o, .pwr_width = pw, \
  29         .pwr_shift = ps, .iso_shift = is }
  30
  31 #define SW_CTRL_VAL(o, s) { .offset = o, .shift = s, }
  32
  33 #define ASIU_DIV_VAL(o, es, hs, hw, ls, lw) \
  34                 { .offset = o, .en_shift = es, .high_shift = hs, \
  35                 .high_width = hw, .low_shift = ls, .low_width = lw }
  36
  37 #define RESET_VAL(o, rs, prs) { .offset = o, .reset_shift = rs, \
  38         .p_reset_shift = prs }
  39
  40 #define DF_VAL(o, kis, kiw, kps, kpw, kas, kaw) { .offset = o, .ki_shift = kis,\
  41         .ki_width = kiw, .kp_shift = kps, .kp_width = kpw, .ka_shift = kas,    \
  42         .ka_width = kaw }
  43
  44 #define VCO_CTRL_VAL(uo, lo) { .u_offset = uo, .l_offset = lo }
  45
  46 #define ENABLE_VAL(o, es, hs, bs) { .offset = o, .enable_shift = es, \
  47         .hold_shift = hs, .bypass_shift = bs }
  48
  49 #define ASIU_GATE_VAL(o, es) { .offset = o, .en_shift = es }
  50
  51 static void __init cygnus_armpll_init(struct device_node *node)
  52 {
  53         iproc_armpll_setup(node);
  54 }
  55 CLK_OF_DECLARE(cygnus_armpll, "brcm,cygnus-armpll", cygnus_armpll_init);
  56
  57 static const struct iproc_pll_ctrl genpll = {
  58         .flags = IPROC_CLK_AON | IPROC_CLK_PLL_HAS_NDIV_FRAC |
  59                 IPROC_CLK_PLL_NEEDS_SW_CFG,
  60         .aon = AON_VAL(0x0, 2, 1, 0),
  61         .reset = RESET_VAL(0x0, 11, 10),
  62         .dig_filter = DF_VAL(0x0, 4, 3, 0, 4, 7, 3),
  63         .sw_ctrl = SW_CTRL_VAL(0x10, 31),
  64         .ndiv_int = REG_VAL(0x10, 20, 10),
  65         .ndiv_frac = REG_VAL(0x10, 0, 20),
  66         .pdiv = REG_VAL(0x14, 0, 4),
  67         .vco_ctrl = VCO_CTRL_VAL(0x18, 0x1c),
  68         .status = REG_VAL(0x28, 12, 1),
  69 };
  70
  71 static const struct iproc_clk_ctrl genpll_clk[] = {
  72         [BCM_CYGNUS_GENPLL_AXI21_CLK] = {
  73                 .channel = BCM_CYGNUS_GENPLL_AXI21_CLK,
  74                 .flags = IPROC_CLK_AON,
  75                 .enable = ENABLE_VAL(0x4, 6, 0, 12),
  76                 .mdiv = REG_VAL(0x20, 0, 8),
  77         },
  78         [BCM_CYGNUS_GENPLL_250MHZ_CLK] = {
  79                 .channel = BCM_CYGNUS_GENPLL_250MHZ_CLK,
  80                 .flags = IPROC_CLK_AON,
  81                 .enable = ENABLE_VAL(0x4, 7, 1, 13),
  82                 .mdiv = REG_VAL(0x20, 10, 8),
  83         },
  84         [BCM_CYGNUS_GENPLL_IHOST_SYS_CLK] = {
  85                 .channel = BCM_CYGNUS_GENPLL_IHOST_SYS_CLK,
  86                 .flags = IPROC_CLK_AON,
  87                 .enable = ENABLE_VAL(0x4, 8, 2, 14),
  88                 .mdiv = REG_VAL(0x20, 20, 8),
  89         },
  90         [BCM_CYGNUS_GENPLL_ENET_SW_CLK] = {
  91                 .channel = BCM_CYGNUS_GENPLL_ENET_SW_CLK,
  92                 .flags = IPROC_CLK_AON,
  93                 .enable = ENABLE_VAL(0x4, 9, 3, 15),
  94                 .mdiv = REG_VAL(0x24, 0, 8),
  95         },
  96         [BCM_CYGNUS_GENPLL_AUDIO_125_CLK] = {
  97                 .channel = BCM_CYGNUS_GENPLL_AUDIO_125_CLK,
  98                 .flags = IPROC_CLK_AON,
  99                 .enable = ENABLE_VAL(0x4, 10, 4, 16),
 100                 .mdiv = REG_VAL(0x24, 10, 8),
 101         },
 102         [BCM_CYGNUS_GENPLL_CAN_CLK] = {
 103                 .channel = BCM_CYGNUS_GENPLL_CAN_CLK,
 104                 .flags = IPROC_CLK_AON,
 105                 .enable = ENABLE_VAL(0x4, 11, 5, 17),
 106                 .mdiv = REG_VAL(0x24, 20, 8),
 107         },
 108 };
 109
 110 static void __init cygnus_genpll_clk_init(struct device_node *node)
 111 {
 112         iproc_pll_clk_setup(node, &genpll, NULL, 0, genpll_clk,
 113                             ARRAY_SIZE(genpll_clk));
 114 }
 115 CLK_OF_DECLARE(cygnus_genpll, "brcm,cygnus-genpll", cygnus_genpll_clk_init);
 116
 117 static const struct iproc_pll_ctrl lcpll0 = {
 118         .flags = IPROC_CLK_AON | IPROC_CLK_PLL_NEEDS_SW_CFG,
 119         .aon = AON_VAL(0x0, 2, 5, 4),
 120         .reset = RESET_VAL(0x0, 31, 30),
 121         .dig_filter = DF_VAL(0x0, 27, 3, 23, 4, 19, 4),
 122         .sw_ctrl = SW_CTRL_VAL(0x4, 31),
 123         .ndiv_int = REG_VAL(0x4, 16, 10),
 124         .pdiv = REG_VAL(0x4, 26, 4),
 125         .vco_ctrl = VCO_CTRL_VAL(0x10, 0x14),
 126         .status = REG_VAL(0x18, 12, 1),
 127 };
 128
 129 static const struct iproc_clk_ctrl lcpll0_clk[] = {
 130         [BCM_CYGNUS_LCPLL0_PCIE_PHY_REF_CLK] = {
 131                 .channel = BCM_CYGNUS_LCPLL0_PCIE_PHY_REF_CLK,
 132                 .flags = IPROC_CLK_AON,
 133                 .enable = ENABLE_VAL(0x0, 7, 1, 13),
 134                 .mdiv = REG_VAL(0x8, 0, 8),
 135         },
 136         [BCM_CYGNUS_LCPLL0_DDR_PHY_CLK] = {
 137                 .channel = BCM_CYGNUS_LCPLL0_DDR_PHY_CLK,
 138                 .flags = IPROC_CLK_AON,
 139                 .enable = ENABLE_VAL(0x0, 8, 2, 14),
 140                 .mdiv = REG_VAL(0x8, 10, 8),
 141         },
 142         [BCM_CYGNUS_LCPLL0_SDIO_CLK] = {
 143                 .channel = BCM_CYGNUS_LCPLL0_SDIO_CLK,
 144                 .flags = IPROC_CLK_AON,
 145                 .enable = ENABLE_VAL(0x0, 9, 3, 15),
 146                 .mdiv = REG_VAL(0x8, 20, 8),
 147         },
 148         [BCM_CYGNUS_LCPLL0_USB_PHY_REF_CLK] = {
 149                 .channel = BCM_CYGNUS_LCPLL0_USB_PHY_REF_CLK,
 150                 .flags = IPROC_CLK_AON,
 151                 .enable = ENABLE_VAL(0x0, 10, 4, 16),
 152                 .mdiv = REG_VAL(0xc, 0, 8),
 153         },
 154         [BCM_CYGNUS_LCPLL0_SMART_CARD_CLK] = {
 155                 .channel = BCM_CYGNUS_LCPLL0_SMART_CARD_CLK,
 156                 .flags = IPROC_CLK_AON,
 157                 .enable = ENABLE_VAL(0x0, 11, 5, 17),
 158                 .mdiv = REG_VAL(0xc, 10, 8),
 159         },
 160         [BCM_CYGNUS_LCPLL0_CH5_UNUSED] = {
 161                 .channel = BCM_CYGNUS_LCPLL0_CH5_UNUSED,
 162                 .flags = IPROC_CLK_AON,
 163                 .enable = ENABLE_VAL(0x0, 12, 6, 18),
 164                 .mdiv = REG_VAL(0xc, 20, 8),
 165         },
 166 };
 167
 168 static void __init cygnus_lcpll0_clk_init(struct device_node *node)
 169 {
 170         iproc_pll_clk_setup(node, &lcpll0, NULL, 0, lcpll0_clk,
 171                             ARRAY_SIZE(lcpll0_clk));
 172 }
 173 CLK_OF_DECLARE(cygnus_lcpll0, "brcm,cygnus-lcpll0", cygnus_lcpll0_clk_init);
 174
 175 /*
 176  * MIPI PLL VCO frequency parameter table
 177  */
 178 static const struct iproc_pll_vco_param mipipll_vco_params[] = {
 179         /* rate (Hz) ndiv_int ndiv_frac pdiv */
 180         { 750000000UL,   30,     0,        1 },
 181         { 1000000000UL,  40,     0,        1 },
 182         { 1350000000ul,  54,     0,        1 },
 183         { 2000000000UL,  80,     0,        1 },
 184         { 2100000000UL,  84,     0,        1 },
 185         { 2250000000UL,  90,     0,        1 },
 186         { 2500000000UL,  100,    0,        1 },
 187         { 2700000000UL,  54,     0,        0 },
 188         { 2975000000UL,  119,    0,        1 },
 189         { 3100000000UL,  124,    0,        1 },
 190         { 3150000000UL,  126,    0,        1 },
 191 };
 192
 193 static const struct iproc_pll_ctrl mipipll = {
 194         .flags = IPROC_CLK_PLL_ASIU | IPROC_CLK_PLL_HAS_NDIV_FRAC |
 195                  IPROC_CLK_NEEDS_READ_BACK,
 196         .aon = AON_VAL(0x0, 4, 17, 16),
 197         .asiu = ASIU_GATE_VAL(0x0, 3),
 198         .reset = RESET_VAL(0x0, 11, 10),
 199         .dig_filter = DF_VAL(0x0, 4, 3, 0, 4, 7, 4),
 200         .ndiv_int = REG_VAL(0x10, 20, 10),
 201         .ndiv_frac = REG_VAL(0x10, 0, 20),
 202         .pdiv = REG_VAL(0x14, 0, 4),
 203         .vco_ctrl = VCO_CTRL_VAL(0x18, 0x1c),
 204         .status = REG_VAL(0x28, 12, 1),
 205 };
 206
 207 static const struct iproc_clk_ctrl mipipll_clk[] = {
 208         [BCM_CYGNUS_MIPIPLL_CH0_UNUSED] = {
 209                 .channel = BCM_CYGNUS_MIPIPLL_CH0_UNUSED,
 210                 .flags = IPROC_CLK_NEEDS_READ_BACK,
 211                 .enable = ENABLE_VAL(0x4, 12, 6, 18),
 212                 .mdiv = REG_VAL(0x20, 0, 8),
 213         },
 214         [BCM_CYGNUS_MIPIPLL_CH1_LCD] = {
 215                 .channel = BCM_CYGNUS_MIPIPLL_CH1_LCD,
 216                 .flags = IPROC_CLK_NEEDS_READ_BACK,
 217                 .enable = ENABLE_VAL(0x4, 13, 7, 19),
 218                 .mdiv = REG_VAL(0x20, 10, 8),
 219         },
 220         [BCM_CYGNUS_MIPIPLL_CH2_V3D] = {
 221                 .channel = BCM_CYGNUS_MIPIPLL_CH2_V3D,
 222                 .flags = IPROC_CLK_NEEDS_READ_BACK,
 223                 .enable = ENABLE_VAL(0x4, 14, 8, 20),
 224                 .mdiv = REG_VAL(0x20, 20, 8),
 225         },
 226         [BCM_CYGNUS_MIPIPLL_CH3_UNUSED] = {
 227                 .channel = BCM_CYGNUS_MIPIPLL_CH3_UNUSED,
 228                 .flags = IPROC_CLK_NEEDS_READ_BACK,
 229                 .enable = ENABLE_VAL(0x4, 15, 9, 21),
 230                 .mdiv = REG_VAL(0x24, 0, 8),
 231         },
 232         [BCM_CYGNUS_MIPIPLL_CH4_UNUSED] = {
 233                 .channel = BCM_CYGNUS_MIPIPLL_CH4_UNUSED,
 234                 .flags = IPROC_CLK_NEEDS_READ_BACK,
 235                 .enable = ENABLE_VAL(0x4, 16, 10, 22),
 236                 .mdiv = REG_VAL(0x24, 10, 8),
 237         },
 238         [BCM_CYGNUS_MIPIPLL_CH5_UNUSED] = {
 239                 .channel = BCM_CYGNUS_MIPIPLL_CH5_UNUSED,
 240                 .flags = IPROC_CLK_NEEDS_READ_BACK,
 241                 .enable = ENABLE_VAL(0x4, 17, 11, 23),
 242                 .mdiv = REG_VAL(0x24, 20, 8),
 243         },
 244 };
 245
 246 static void __init cygnus_mipipll_clk_init(struct device_node *node)
 247 {
 248         iproc_pll_clk_setup(node, &mipipll, mipipll_vco_params,
 249                             ARRAY_SIZE(mipipll_vco_params), mipipll_clk,
 250                             ARRAY_SIZE(mipipll_clk));
 251 }
 252 CLK_OF_DECLARE(cygnus_mipipll, "brcm,cygnus-mipipll", cygnus_mipipll_clk_init);
 253
 254 static const struct iproc_asiu_div asiu_div[] = {
 255         [BCM_CYGNUS_ASIU_KEYPAD_CLK] = ASIU_DIV_VAL(0x0, 31, 16, 10, 0, 10),
 256         [BCM_CYGNUS_ASIU_ADC_CLK] = ASIU_DIV_VAL(0x4, 31, 16, 10, 0, 10),
 257         [BCM_CYGNUS_ASIU_PWM_CLK] = ASIU_DIV_VAL(0x8, 31, 16, 10, 0, 10),
 258 };
 259
 260 static const struct iproc_asiu_gate asiu_gate[] = {
 261         [BCM_CYGNUS_ASIU_KEYPAD_CLK] = ASIU_GATE_VAL(0x0, 7),
 262         [BCM_CYGNUS_ASIU_ADC_CLK] = ASIU_GATE_VAL(0x0, 9),
 263         [BCM_CYGNUS_ASIU_PWM_CLK] = ASIU_GATE_VAL(IPROC_CLK_INVALID_OFFSET, 0),
 264 };
 265
 266 static void __init cygnus_asiu_init(struct device_node *node)
 267 {
 268         iproc_asiu_setup(node, asiu_div, asiu_gate, ARRAY_SIZE(asiu_div));
 269 }
 270 CLK_OF_DECLARE(cygnus_asiu_clk, "brcm,cygnus-asiu-clk", cygnus_asiu_init);
 271
 272 /*
 273  * AUDIO PLL VCO frequency parameter table
 274  *
 275  * PLL output frequency = ((ndiv_int + ndiv_frac / 2^20) *
 276  * (parent clock rate / pdiv)
 277  *
 278  * On Cygnus, parent is the 25MHz oscillator
 279  */
 280 static const struct iproc_pll_vco_param audiopll_vco_params[] = {
 281         /* rate (Hz) ndiv_int ndiv_frac pdiv */
 282         { 1354750204UL,  54,     199238,   1 },
 283         { 1769470191UL,  70,     816639,   1 },
 284 };
 285
 286 static const struct iproc_pll_ctrl audiopll = {
 287         .flags = IPROC_CLK_PLL_NEEDS_SW_CFG | IPROC_CLK_PLL_HAS_NDIV_FRAC |
 288                 IPROC_CLK_PLL_USER_MODE_ON | IPROC_CLK_PLL_RESET_ACTIVE_LOW,
 289         .reset = RESET_VAL(0x5c, 0, 1),
 290         .dig_filter = DF_VAL(0x48, 0, 3, 6, 4, 3, 3),
 291         .sw_ctrl = SW_CTRL_VAL(0x4, 0),
 292         .ndiv_int = REG_VAL(0x8, 0, 10),
 293         .ndiv_frac = REG_VAL(0x8, 10, 20),
 294         .pdiv = REG_VAL(0x44, 0, 4),
 295         .vco_ctrl = VCO_CTRL_VAL(0x0c, 0x10),
 296         .status = REG_VAL(0x54, 0, 1),
 297         .macro_mode = REG_VAL(0x0, 0, 3),
 298 };
 299
 300 static const struct iproc_clk_ctrl audiopll_clk[] = {
 301         [BCM_CYGNUS_AUDIOPLL_CH0] = {
 302                 .channel = BCM_CYGNUS_AUDIOPLL_CH0,
 303                 .flags = IPROC_CLK_AON |
 304                                 IPROC_CLK_MCLK_DIV_BY_2,
 305                 .enable = ENABLE_VAL(0x14, 8, 10, 9),
 306                 .mdiv = REG_VAL(0x14, 0, 8),
 307         },
 308         [BCM_CYGNUS_AUDIOPLL_CH1] = {
 309                 .channel = BCM_CYGNUS_AUDIOPLL_CH1,
 310                 .flags = IPROC_CLK_AON,
 311                 .enable = ENABLE_VAL(0x18, 8, 10, 9),
 312                 .mdiv = REG_VAL(0x18, 0, 8),
 313         },
 314         [BCM_CYGNUS_AUDIOPLL_CH2] = {
 315                 .channel = BCM_CYGNUS_AUDIOPLL_CH2,
 316                 .flags = IPROC_CLK_AON,
 317                 .enable = ENABLE_VAL(0x1c, 8, 10, 9),
 318                 .mdiv = REG_VAL(0x1c, 0, 8),
 319         },
 320 };
 321
 322 static void __init cygnus_audiopll_clk_init(struct device_node *node)
 323 {
 324         iproc_pll_clk_setup(node, &audiopll, audiopll_vco_params,
 325                             ARRAY_SIZE(audiopll_vco_params), audiopll_clk,
 326                             ARRAY_SIZE(audiopll_clk));
 327 }
 328 CLK_OF_DECLARE(cygnus_audiopll, "brcm,cygnus-audiopll",
 329                         cygnus_audiopll_clk_init);