drivers/clk/hisilicon/crg-hi3798cv200.c

   1 /*
   2  * Hi3798CV200 Clock and Reset Generator Driver
   3  *
   4  * Copyright (c) 2016 HiSilicon Technologies Co., Ltd.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <dt-bindings/clock/histb-clock.h>
  21 #include <linux/clk-provider.h>
  22 #include <linux/module.h>
  23 #include <linux/of_device.h>
  24 #include <linux/platform_device.h>
  25 #include "clk.h"
  26 #include "crg.h"
  27 #include "reset.h"
  28
  29 /* hi3798CV200 core CRG */
  30 #define HI3798CV200_INNER_CLK_OFFSET    64
  31 #define HI3798CV200_FIXED_24M   65
  32 #define HI3798CV200_FIXED_25M   66
  33 #define HI3798CV200_FIXED_50M   67
  34 #define HI3798CV200_FIXED_75M   68
  35 #define HI3798CV200_FIXED_100M  69
  36 #define HI3798CV200_FIXED_150M  70
  37 #define HI3798CV200_FIXED_200M  71
  38 #define HI3798CV200_FIXED_250M  72
  39 #define HI3798CV200_FIXED_300M  73
  40 #define HI3798CV200_FIXED_400M  74
  41 #define HI3798CV200_MMC_MUX     75
  42 #define HI3798CV200_ETH_PUB_CLK 76
  43 #define HI3798CV200_ETH_BUS_CLK 77
  44 #define HI3798CV200_ETH_BUS0_CLK        78
  45 #define HI3798CV200_ETH_BUS1_CLK        79
  46 #define HI3798CV200_COMBPHY1_MUX        80
  47 #define HI3798CV200_FIXED_12M   81
  48 #define HI3798CV200_FIXED_48M   82
  49 #define HI3798CV200_FIXED_60M   83
  50 #define HI3798CV200_FIXED_166P5M        84
  51 #define HI3798CV200_SDIO0_MUX   85
  52
  53 #define HI3798CV200_CRG_NR_CLKS         128
  54
  55 static const struct hisi_fixed_rate_clock hi3798cv200_fixed_rate_clks[] = {
  56         { HISTB_OSC_CLK, "clk_osc", NULL, 0, 24000000, },
  57         { HISTB_APB_CLK, "clk_apb", NULL, 0, 100000000, },
  58         { HISTB_AHB_CLK, "clk_ahb", NULL, 0, 200000000, },
  59         { HI3798CV200_FIXED_12M, "12m", NULL, 0, 12000000, },
  60         { HI3798CV200_FIXED_24M, "24m", NULL, 0, 24000000, },
  61         { HI3798CV200_FIXED_25M, "25m", NULL, 0, 25000000, },
  62         { HI3798CV200_FIXED_48M, "48m", NULL, 0, 48000000, },
  63         { HI3798CV200_FIXED_50M, "50m", NULL, 0, 50000000, },
  64         { HI3798CV200_FIXED_60M, "60m", NULL, 0, 60000000, },
  65         { HI3798CV200_FIXED_75M, "75m", NULL, 0, 75000000, },
  66         { HI3798CV200_FIXED_100M, "100m", NULL, 0, 100000000, },
  67         { HI3798CV200_FIXED_150M, "150m", NULL, 0, 150000000, },
  68         { HI3798CV200_FIXED_166P5M, "166p5m", NULL, 0, 165000000, },
  69         { HI3798CV200_FIXED_200M, "200m", NULL, 0, 200000000, },
  70         { HI3798CV200_FIXED_250M, "250m", NULL, 0, 250000000, },
  71 };
  72
  73 static const char *const mmc_mux_p[] = {
  74                 "100m", "50m", "25m", "200m", "150m" };
  75 static u32 mmc_mux_table[] = {0, 1, 2, 3, 6};
  76
  77 static const char *const comphy1_mux_p[] = {
  78                 "100m", "25m"};
  79 static u32 comphy1_mux_table[] = {2, 3};
  80
  81 static const char *const sdio_mux_p[] = {
  82                 "100m", "50m", "150m", "166p5m" };
  83 static u32 sdio_mux_table[] = {0, 1, 2, 3};
  84
  85 static struct hisi_mux_clock hi3798cv200_mux_clks[] = {
  86         { HI3798CV200_MMC_MUX, "mmc_mux", mmc_mux_p, ARRAY_SIZE(mmc_mux_p),
  87                 CLK_SET_RATE_PARENT, 0xa0, 8, 3, 0, mmc_mux_table, },
  88         { HI3798CV200_COMBPHY1_MUX, "combphy1_mux",
  89                 comphy1_mux_p, ARRAY_SIZE(comphy1_mux_p),
  90                 CLK_SET_RATE_PARENT, 0x188, 10, 2, 0, comphy1_mux_table, },
  91         { HI3798CV200_SDIO0_MUX, "sdio0_mux", sdio_mux_p,
  92                 ARRAY_SIZE(sdio_mux_p), CLK_SET_RATE_PARENT,
  93                 0x9c, 8, 2, 0, sdio_mux_table, },
  94 };
  95
  96 static const struct hisi_gate_clock hi3798cv200_gate_clks[] = {
  97         /* UART */
  98         { HISTB_UART2_CLK, "clk_uart2", "75m",
  99                 CLK_SET_RATE_PARENT, 0x68, 4, 0, },
 100         /* I2C */
 101         { HISTB_I2C0_CLK, "clk_i2c0", "clk_apb",
 102                 CLK_SET_RATE_PARENT, 0x6C, 4, 0, },
 103         { HISTB_I2C1_CLK, "clk_i2c1", "clk_apb",
 104                 CLK_SET_RATE_PARENT, 0x6C, 8, 0, },
 105         { HISTB_I2C2_CLK, "clk_i2c2", "clk_apb",
 106                 CLK_SET_RATE_PARENT, 0x6C, 12, 0, },
 107         { HISTB_I2C3_CLK, "clk_i2c3", "clk_apb",
 108                 CLK_SET_RATE_PARENT, 0x6C, 16, 0, },
 109         { HISTB_I2C4_CLK, "clk_i2c4", "clk_apb",
 110                 CLK_SET_RATE_PARENT, 0x6C, 20, 0, },
 111         /* SPI */
 112         { HISTB_SPI0_CLK, "clk_spi0", "clk_apb",
 113                 CLK_SET_RATE_PARENT, 0x70, 0, 0, },
 114         /* SDIO */
 115         { HISTB_SDIO0_BIU_CLK, "clk_sdio0_biu", "200m",
 116                         CLK_SET_RATE_PARENT, 0x9c, 0, 0, },
 117         { HISTB_SDIO0_CIU_CLK, "clk_sdio0_ciu", "sdio0_mux",
 118                 CLK_SET_RATE_PARENT, 0x9c, 1, 0, },
 119         /* EMMC */
 120         { HISTB_MMC_BIU_CLK, "clk_mmc_biu", "200m",
 121                 CLK_SET_RATE_PARENT, 0xa0, 0, 0, },
 122         { HISTB_MMC_CIU_CLK, "clk_mmc_ciu", "mmc_mux",
 123                 CLK_SET_RATE_PARENT, 0xa0, 1, 0, },
 124         /* PCIE*/
 125         { HISTB_PCIE_BUS_CLK, "clk_pcie_bus", "200m",
 126                 CLK_SET_RATE_PARENT, 0x18c, 0, 0, },
 127         { HISTB_PCIE_SYS_CLK, "clk_pcie_sys", "100m",
 128                 CLK_SET_RATE_PARENT, 0x18c, 1, 0, },
 129         { HISTB_PCIE_PIPE_CLK, "clk_pcie_pipe", "250m",
 130                 CLK_SET_RATE_PARENT, 0x18c, 2, 0, },
 131         { HISTB_PCIE_AUX_CLK, "clk_pcie_aux", "24m",
 132                 CLK_SET_RATE_PARENT, 0x18c, 3, 0, },
 133         /* Ethernet */
 134         { HI3798CV200_ETH_PUB_CLK, "clk_pub", NULL,
 135                 CLK_SET_RATE_PARENT, 0xcc, 5, 0, },
 136         { HI3798CV200_ETH_BUS_CLK, "clk_bus", "clk_pub",
 137                 CLK_SET_RATE_PARENT, 0xcc, 0, 0, },
 138         { HI3798CV200_ETH_BUS0_CLK, "clk_bus_m0", "clk_bus",
 139                 CLK_SET_RATE_PARENT, 0xcc, 1, 0, },
 140         { HI3798CV200_ETH_BUS1_CLK, "clk_bus_m1", "clk_bus",
 141                 CLK_SET_RATE_PARENT, 0xcc, 2, 0, },
 142         { HISTB_ETH0_MAC_CLK, "clk_mac0", "clk_bus_m0",
 143                 CLK_SET_RATE_PARENT, 0xcc, 3, 0, },
 144         { HISTB_ETH0_MACIF_CLK, "clk_macif0", "clk_bus_m0",
 145                 CLK_SET_RATE_PARENT, 0xcc, 24, 0, },
 146         { HISTB_ETH1_MAC_CLK, "clk_mac1", "clk_bus_m1",
 147                 CLK_SET_RATE_PARENT, 0xcc, 4, 0, },
 148         { HISTB_ETH1_MACIF_CLK, "clk_macif1", "clk_bus_m1",
 149                 CLK_SET_RATE_PARENT, 0xcc, 25, 0, },
 150         /* COMBPHY1 */
 151         { HISTB_COMBPHY1_CLK, "clk_combphy1", "combphy1_mux",
 152                 CLK_SET_RATE_PARENT, 0x188, 8, 0, },
 153         /* USB2 */
 154         { HISTB_USB2_BUS_CLK, "clk_u2_bus", "clk_ahb",
 155                 CLK_SET_RATE_PARENT, 0xb8, 0, 0, },
 156         { HISTB_USB2_PHY_CLK, "clk_u2_phy", "60m",
 157                 CLK_SET_RATE_PARENT, 0xb8, 4, 0, },
 158         { HISTB_USB2_12M_CLK, "clk_u2_12m", "12m",
 159                 CLK_SET_RATE_PARENT, 0xb8, 2, 0 },
 160         { HISTB_USB2_48M_CLK, "clk_u2_48m", "48m",
 161                 CLK_SET_RATE_PARENT, 0xb8, 1, 0 },
 162         { HISTB_USB2_UTMI_CLK, "clk_u2_utmi", "60m",
 163                 CLK_SET_RATE_PARENT, 0xb8, 5, 0 },
 164         { HISTB_USB2_PHY1_REF_CLK, "clk_u2_phy1_ref", "24m",
 165                 CLK_SET_RATE_PARENT, 0xbc, 0, 0 },
 166         { HISTB_USB2_PHY2_REF_CLK, "clk_u2_phy2_ref", "24m",
 167                 CLK_SET_RATE_PARENT, 0xbc, 2, 0 },
 168 };
 169
 170 static struct hisi_clock_data *hi3798cv200_clk_register(
 171                                 struct platform_device *pdev)
 172 {
 173         struct hisi_clock_data *clk_data;
 174         int ret;
 175
 176         clk_data = hisi_clk_alloc(pdev, HI3798CV200_CRG_NR_CLKS);
 177         if (!clk_data)
 178                 return ERR_PTR(-ENOMEM);
 179
 180         ret = hisi_clk_register_fixed_rate(hi3798cv200_fixed_rate_clks,
 181                                      ARRAY_SIZE(hi3798cv200_fixed_rate_clks),
 182                                      clk_data);
 183         if (ret)
 184                 return ERR_PTR(ret);
 185
 186         ret = hisi_clk_register_mux(hi3798cv200_mux_clks,
 187                                 ARRAY_SIZE(hi3798cv200_mux_clks),
 188                                 clk_data);
 189         if (ret)
 190                 goto unregister_fixed_rate;
 191
 192         ret = hisi_clk_register_gate(hi3798cv200_gate_clks,
 193                                 ARRAY_SIZE(hi3798cv200_gate_clks),
 194                                 clk_data);
 195         if (ret)
 196                 goto unregister_mux;
 197
 198         ret = of_clk_add_provider(pdev->dev.of_node,
 199                         of_clk_src_onecell_get, &clk_data->clk_data);
 200         if (ret)
 201                 goto unregister_gate;
 202
 203         return clk_data;
 204
 205 unregister_fixed_rate:
 206         hisi_clk_unregister_fixed_rate(hi3798cv200_fixed_rate_clks,
 207                                 ARRAY_SIZE(hi3798cv200_fixed_rate_clks),
 208                                 clk_data);
 209
 210 unregister_mux:
 211         hisi_clk_unregister_mux(hi3798cv200_mux_clks,
 212                                 ARRAY_SIZE(hi3798cv200_mux_clks),
 213                                 clk_data);
 214 unregister_gate:
 215         hisi_clk_unregister_gate(hi3798cv200_gate_clks,
 216                                 ARRAY_SIZE(hi3798cv200_gate_clks),
 217                                 clk_data);
 218         return ERR_PTR(ret);
 219 }
 220
 221 static void hi3798cv200_clk_unregister(struct platform_device *pdev)
 222 {
 223         struct hisi_crg_dev *crg = platform_get_drvdata(pdev);
 224
 225         of_clk_del_provider(pdev->dev.of_node);
 226
 227         hisi_clk_unregister_gate(hi3798cv200_gate_clks,
 228                                 ARRAY_SIZE(hi3798cv200_gate_clks),
 229                                 crg->clk_data);
 230         hisi_clk_unregister_mux(hi3798cv200_mux_clks,
 231                                 ARRAY_SIZE(hi3798cv200_mux_clks),
 232                                 crg->clk_data);
 233         hisi_clk_unregister_fixed_rate(hi3798cv200_fixed_rate_clks,
 234                                 ARRAY_SIZE(hi3798cv200_fixed_rate_clks),
 235                                 crg->clk_data);
 236 }
 237
 238 static const struct hisi_crg_funcs hi3798cv200_crg_funcs = {
 239         .register_clks = hi3798cv200_clk_register,
 240         .unregister_clks = hi3798cv200_clk_unregister,
 241 };
 242
 243 /* hi3798CV200 sysctrl CRG */
 244
 245 #define HI3798CV200_SYSCTRL_NR_CLKS 16
 246
 247 static const struct hisi_gate_clock hi3798cv200_sysctrl_gate_clks[] = {
 248         { HISTB_IR_CLK, "clk_ir", "100m",
 249                 CLK_SET_RATE_PARENT, 0x48, 4, 0, },
 250         { HISTB_TIMER01_CLK, "clk_timer01", "24m",
 251                 CLK_SET_RATE_PARENT, 0x48, 6, 0, },
 252         { HISTB_UART0_CLK, "clk_uart0", "75m",
 253                 CLK_SET_RATE_PARENT, 0x48, 10, 0, },
 254 };
 255
 256 static struct hisi_clock_data *hi3798cv200_sysctrl_clk_register(
 257                                         struct platform_device *pdev)
 258 {
 259         struct hisi_clock_data *clk_data;
 260         int ret;
 261
 262         clk_data = hisi_clk_alloc(pdev, HI3798CV200_SYSCTRL_NR_CLKS);
 263         if (!clk_data)
 264                 return ERR_PTR(-ENOMEM);
 265
 266         ret = hisi_clk_register_gate(hi3798cv200_sysctrl_gate_clks,
 267                                 ARRAY_SIZE(hi3798cv200_sysctrl_gate_clks),
 268                                 clk_data);
 269         if (ret)
 270                 return ERR_PTR(ret);
 271
 272         ret = of_clk_add_provider(pdev->dev.of_node,
 273                         of_clk_src_onecell_get, &clk_data->clk_data);
 274         if (ret)
 275                 goto unregister_gate;
 276
 277         return clk_data;
 278
 279 unregister_gate:
 280         hisi_clk_unregister_gate(hi3798cv200_sysctrl_gate_clks,
 281                                 ARRAY_SIZE(hi3798cv200_sysctrl_gate_clks),
 282                                 clk_data);
 283         return ERR_PTR(ret);
 284 }
 285
 286 static void hi3798cv200_sysctrl_clk_unregister(struct platform_device *pdev)
 287 {
 288         struct hisi_crg_dev *crg = platform_get_drvdata(pdev);
 289
 290         of_clk_del_provider(pdev->dev.of_node);
 291
 292         hisi_clk_unregister_gate(hi3798cv200_sysctrl_gate_clks,
 293                                 ARRAY_SIZE(hi3798cv200_sysctrl_gate_clks),
 294                                 crg->clk_data);
 295 }
 296
 297 static const struct hisi_crg_funcs hi3798cv200_sysctrl_funcs = {
 298         .register_clks = hi3798cv200_sysctrl_clk_register,
 299         .unregister_clks = hi3798cv200_sysctrl_clk_unregister,
 300 };
 301
 302 static const struct of_device_id hi3798cv200_crg_match_table[] = {
 303         { .compatible = "hisilicon,hi3798cv200-crg",
 304                 .data = &hi3798cv200_crg_funcs },
 305         { .compatible = "hisilicon,hi3798cv200-sysctrl",
 306                 .data = &hi3798cv200_sysctrl_funcs },
 307         { }
 308 };
 309 MODULE_DEVICE_TABLE(of, hi3798cv200_crg_match_table);
 310
 311 static int hi3798cv200_crg_probe(struct platform_device *pdev)
 312 {
 313         struct hisi_crg_dev *crg;
 314
 315         crg = devm_kmalloc(&pdev->dev, sizeof(*crg), GFP_KERNEL);
 316         if (!crg)
 317                 return -ENOMEM;
 318
 319         crg->funcs = of_device_get_match_data(&pdev->dev);
 320         if (!crg->funcs)
 321                 return -ENOENT;
 322
 323         crg->rstc = hisi_reset_init(pdev);
 324         if (!crg->rstc)
 325                 return -ENOMEM;
 326
 327         crg->clk_data = crg->funcs->register_clks(pdev);
 328         if (IS_ERR(crg->clk_data)) {
 329                 hisi_reset_exit(crg->rstc);
 330                 return PTR_ERR(crg->clk_data);
 331         }
 332
 333         platform_set_drvdata(pdev, crg);
 334         return 0;
 335 }
 336
 337 static int hi3798cv200_crg_remove(struct platform_device *pdev)
 338 {
 339         struct hisi_crg_dev *crg = platform_get_drvdata(pdev);
 340
 341         hisi_reset_exit(crg->rstc);
 342         crg->funcs->unregister_clks(pdev);
 343         return 0;
 344 }
 345
 346 static struct platform_driver hi3798cv200_crg_driver = {
 347         .probe          = hi3798cv200_crg_probe,
 348         .remove         = hi3798cv200_crg_remove,
 349         .driver         = {
 350                 .name   = "hi3798cv200-crg",
 351                 .of_match_table = hi3798cv200_crg_match_table,
 352         },
 353 };
 354
 355 static int __init hi3798cv200_crg_init(void)
 356 {
 357         return platform_driver_register(&hi3798cv200_crg_driver);
 358 }
 359 core_initcall(hi3798cv200_crg_init);
 360
 361 static void __exit hi3798cv200_crg_exit(void)
 362 {
 363         platform_driver_unregister(&hi3798cv200_crg_driver);
 364 }
 365 module_exit(hi3798cv200_crg_exit);
 366
 367 MODULE_LICENSE("GPL v2");
 368 MODULE_DESCRIPTION("HiSilicon Hi3798CV200 CRG Driver");