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
  48 #define HI3798CV200_CRG_NR_CLKS         128
  49
  50 static const struct hisi_fixed_rate_clock hi3798cv200_fixed_rate_clks[] = {
  51         { HISTB_OSC_CLK, "clk_osc", NULL, 0, 24000000, },
  52         { HISTB_APB_CLK, "clk_apb", NULL, 0, 100000000, },
  53         { HISTB_AHB_CLK, "clk_ahb", NULL, 0, 200000000, },
  54         { HI3798CV200_FIXED_24M, "24m", NULL, 0, 24000000, },
  55         { HI3798CV200_FIXED_25M, "25m", NULL, 0, 25000000, },
  56         { HI3798CV200_FIXED_50M, "50m", NULL, 0, 50000000, },
  57         { HI3798CV200_FIXED_75M, "75m", NULL, 0, 75000000, },
  58         { HI3798CV200_FIXED_100M, "100m", NULL, 0, 100000000, },
  59         { HI3798CV200_FIXED_150M, "150m", NULL, 0, 150000000, },
  60         { HI3798CV200_FIXED_200M, "200m", NULL, 0, 200000000, },
  61         { HI3798CV200_FIXED_250M, "250m", NULL, 0, 250000000, },
  62 };
  63
  64 static const char *const mmc_mux_p[] = {
  65                 "100m", "50m", "25m", "200m", "150m" };
  66 static u32 mmc_mux_table[] = {0, 1, 2, 3, 6};
  67
  68 static const char *const comphy1_mux_p[] = {
  69                 "100m", "25m"};
  70 static u32 comphy1_mux_table[] = {2, 3};
  71
  72 static struct hisi_mux_clock hi3798cv200_mux_clks[] = {
  73         { HI3798CV200_MMC_MUX, "mmc_mux", mmc_mux_p, ARRAY_SIZE(mmc_mux_p),
  74                 CLK_SET_RATE_PARENT, 0xa0, 8, 3, 0, mmc_mux_table, },
  75         { HI3798CV200_COMBPHY1_MUX, "combphy1_mux",
  76                 comphy1_mux_p, ARRAY_SIZE(comphy1_mux_p),
  77                 CLK_SET_RATE_PARENT, 0x188, 10, 2, 0, comphy1_mux_table, },
  78 };
  79
  80 static const struct hisi_gate_clock hi3798cv200_gate_clks[] = {
  81         /* UART */
  82         { HISTB_UART2_CLK, "clk_uart2", "75m",
  83                 CLK_SET_RATE_PARENT, 0x68, 4, 0, },
  84         /* I2C */
  85         { HISTB_I2C0_CLK, "clk_i2c0", "clk_apb",
  86                 CLK_SET_RATE_PARENT, 0x6C, 4, 0, },
  87         { HISTB_I2C1_CLK, "clk_i2c1", "clk_apb",
  88                 CLK_SET_RATE_PARENT, 0x6C, 8, 0, },
  89         { HISTB_I2C2_CLK, "clk_i2c2", "clk_apb",
  90                 CLK_SET_RATE_PARENT, 0x6C, 12, 0, },
  91         { HISTB_I2C3_CLK, "clk_i2c3", "clk_apb",
  92                 CLK_SET_RATE_PARENT, 0x6C, 16, 0, },
  93         { HISTB_I2C4_CLK, "clk_i2c4", "clk_apb",
  94                 CLK_SET_RATE_PARENT, 0x6C, 20, 0, },
  95         /* SPI */
  96         { HISTB_SPI0_CLK, "clk_spi0", "clk_apb",
  97                 CLK_SET_RATE_PARENT, 0x70, 0, 0, },
  98         /* SDIO */
  99         { HISTB_SDIO0_BIU_CLK, "clk_sdio0_biu", "200m",
 100                         CLK_SET_RATE_PARENT, 0x9c, 0, 0, },
 101         { HISTB_SDIO0_CIU_CLK, "clk_sdio0_ciu", "mmc_mux",
 102                 CLK_SET_RATE_PARENT, 0x9c, 1, 0, },
 103         /* EMMC */
 104         { HISTB_MMC_BIU_CLK, "clk_mmc_biu", "200m",
 105                 CLK_SET_RATE_PARENT, 0xa0, 0, 0, },
 106         { HISTB_MMC_CIU_CLK, "clk_mmc_ciu", "mmc_mux",
 107                 CLK_SET_RATE_PARENT, 0xa0, 1, 0, },
 108         /* PCIE*/
 109         { HISTB_PCIE_BUS_CLK, "clk_pcie_bus", "200m",
 110                 CLK_SET_RATE_PARENT, 0x18c, 0, 0, },
 111         { HISTB_PCIE_SYS_CLK, "clk_pcie_sys", "100m",
 112                 CLK_SET_RATE_PARENT, 0x18c, 1, 0, },
 113         { HISTB_PCIE_PIPE_CLK, "clk_pcie_pipe", "250m",
 114                 CLK_SET_RATE_PARENT, 0x18c, 2, 0, },
 115         { HISTB_PCIE_AUX_CLK, "clk_pcie_aux", "24m",
 116                 CLK_SET_RATE_PARENT, 0x18c, 3, 0, },
 117         /* Ethernet */
 118         { HI3798CV200_ETH_PUB_CLK, "clk_pub", NULL,
 119                 CLK_SET_RATE_PARENT, 0xcc, 5, 0, },
 120         { HI3798CV200_ETH_BUS_CLK, "clk_bus", "clk_pub",
 121                 CLK_SET_RATE_PARENT, 0xcc, 0, 0, },
 122         { HI3798CV200_ETH_BUS0_CLK, "clk_bus_m0", "clk_bus",
 123                 CLK_SET_RATE_PARENT, 0xcc, 1, 0, },
 124         { HI3798CV200_ETH_BUS1_CLK, "clk_bus_m1", "clk_bus",
 125                 CLK_SET_RATE_PARENT, 0xcc, 2, 0, },
 126         { HISTB_ETH0_MAC_CLK, "clk_mac0", "clk_bus_m0",
 127                 CLK_SET_RATE_PARENT, 0xcc, 3, 0, },
 128         { HISTB_ETH0_MACIF_CLK, "clk_macif0", "clk_bus_m0",
 129                 CLK_SET_RATE_PARENT, 0xcc, 24, 0, },
 130         { HISTB_ETH1_MAC_CLK, "clk_mac1", "clk_bus_m1",
 131                 CLK_SET_RATE_PARENT, 0xcc, 4, 0, },
 132         { HISTB_ETH1_MACIF_CLK, "clk_macif1", "clk_bus_m1",
 133                 CLK_SET_RATE_PARENT, 0xcc, 25, 0, },
 134         /* COMBPHY1 */
 135         { HISTB_COMBPHY1_CLK, "clk_combphy1", "combphy1_mux",
 136                 CLK_SET_RATE_PARENT, 0x188, 8, 0, },
 137 };
 138
 139 static struct hisi_clock_data *hi3798cv200_clk_register(
 140                                 struct platform_device *pdev)
 141 {
 142         struct hisi_clock_data *clk_data;
 143         int ret;
 144
 145         clk_data = hisi_clk_alloc(pdev, HI3798CV200_CRG_NR_CLKS);
 146         if (!clk_data)
 147                 return ERR_PTR(-ENOMEM);
 148
 149         ret = hisi_clk_register_fixed_rate(hi3798cv200_fixed_rate_clks,
 150                                      ARRAY_SIZE(hi3798cv200_fixed_rate_clks),
 151                                      clk_data);
 152         if (ret)
 153                 return ERR_PTR(ret);
 154
 155         ret = hisi_clk_register_mux(hi3798cv200_mux_clks,
 156                                 ARRAY_SIZE(hi3798cv200_mux_clks),
 157                                 clk_data);
 158         if (ret)
 159                 goto unregister_fixed_rate;
 160
 161         ret = hisi_clk_register_gate(hi3798cv200_gate_clks,
 162                                 ARRAY_SIZE(hi3798cv200_gate_clks),
 163                                 clk_data);
 164         if (ret)
 165                 goto unregister_mux;
 166
 167         ret = of_clk_add_provider(pdev->dev.of_node,
 168                         of_clk_src_onecell_get, &clk_data->clk_data);
 169         if (ret)
 170                 goto unregister_gate;
 171
 172         return clk_data;
 173
 174 unregister_fixed_rate:
 175         hisi_clk_unregister_fixed_rate(hi3798cv200_fixed_rate_clks,
 176                                 ARRAY_SIZE(hi3798cv200_fixed_rate_clks),
 177                                 clk_data);
 178
 179 unregister_mux:
 180         hisi_clk_unregister_mux(hi3798cv200_mux_clks,
 181                                 ARRAY_SIZE(hi3798cv200_mux_clks),
 182                                 clk_data);
 183 unregister_gate:
 184         hisi_clk_unregister_gate(hi3798cv200_gate_clks,
 185                                 ARRAY_SIZE(hi3798cv200_gate_clks),
 186                                 clk_data);
 187         return ERR_PTR(ret);
 188 }
 189
 190 static void hi3798cv200_clk_unregister(struct platform_device *pdev)
 191 {
 192         struct hisi_crg_dev *crg = platform_get_drvdata(pdev);
 193
 194         of_clk_del_provider(pdev->dev.of_node);
 195
 196         hisi_clk_unregister_gate(hi3798cv200_gate_clks,
 197                                 ARRAY_SIZE(hi3798cv200_gate_clks),
 198                                 crg->clk_data);
 199         hisi_clk_unregister_mux(hi3798cv200_mux_clks,
 200                                 ARRAY_SIZE(hi3798cv200_mux_clks),
 201                                 crg->clk_data);
 202         hisi_clk_unregister_fixed_rate(hi3798cv200_fixed_rate_clks,
 203                                 ARRAY_SIZE(hi3798cv200_fixed_rate_clks),
 204                                 crg->clk_data);
 205 }
 206
 207 static const struct hisi_crg_funcs hi3798cv200_crg_funcs = {
 208         .register_clks = hi3798cv200_clk_register,
 209         .unregister_clks = hi3798cv200_clk_unregister,
 210 };
 211
 212 /* hi3798CV200 sysctrl CRG */
 213
 214 #define HI3798CV200_SYSCTRL_NR_CLKS 16
 215
 216 static const struct hisi_gate_clock hi3798cv200_sysctrl_gate_clks[] = {
 217         { HISTB_IR_CLK, "clk_ir", "100m",
 218                 CLK_SET_RATE_PARENT, 0x48, 4, 0, },
 219         { HISTB_TIMER01_CLK, "clk_timer01", "24m",
 220                 CLK_SET_RATE_PARENT, 0x48, 6, 0, },
 221         { HISTB_UART0_CLK, "clk_uart0", "75m",
 222                 CLK_SET_RATE_PARENT, 0x48, 10, 0, },
 223 };
 224
 225 static struct hisi_clock_data *hi3798cv200_sysctrl_clk_register(
 226                                         struct platform_device *pdev)
 227 {
 228         struct hisi_clock_data *clk_data;
 229         int ret;
 230
 231         clk_data = hisi_clk_alloc(pdev, HI3798CV200_SYSCTRL_NR_CLKS);
 232         if (!clk_data)
 233                 return ERR_PTR(-ENOMEM);
 234
 235         ret = hisi_clk_register_gate(hi3798cv200_sysctrl_gate_clks,
 236                                 ARRAY_SIZE(hi3798cv200_sysctrl_gate_clks),
 237                                 clk_data);
 238         if (ret)
 239                 return ERR_PTR(ret);
 240
 241         ret = of_clk_add_provider(pdev->dev.of_node,
 242                         of_clk_src_onecell_get, &clk_data->clk_data);
 243         if (ret)
 244                 goto unregister_gate;
 245
 246         return clk_data;
 247
 248 unregister_gate:
 249         hisi_clk_unregister_gate(hi3798cv200_sysctrl_gate_clks,
 250                                 ARRAY_SIZE(hi3798cv200_sysctrl_gate_clks),
 251                                 clk_data);
 252         return ERR_PTR(ret);
 253 }
 254
 255 static void hi3798cv200_sysctrl_clk_unregister(struct platform_device *pdev)
 256 {
 257         struct hisi_crg_dev *crg = platform_get_drvdata(pdev);
 258
 259         of_clk_del_provider(pdev->dev.of_node);
 260
 261         hisi_clk_unregister_gate(hi3798cv200_sysctrl_gate_clks,
 262                                 ARRAY_SIZE(hi3798cv200_sysctrl_gate_clks),
 263                                 crg->clk_data);
 264 }
 265
 266 static const struct hisi_crg_funcs hi3798cv200_sysctrl_funcs = {
 267         .register_clks = hi3798cv200_sysctrl_clk_register,
 268         .unregister_clks = hi3798cv200_sysctrl_clk_unregister,
 269 };
 270
 271 static const struct of_device_id hi3798cv200_crg_match_table[] = {
 272         { .compatible = "hisilicon,hi3798cv200-crg",
 273                 .data = &hi3798cv200_crg_funcs },
 274         { .compatible = "hisilicon,hi3798cv200-sysctrl",
 275                 .data = &hi3798cv200_sysctrl_funcs },
 276         { }
 277 };
 278 MODULE_DEVICE_TABLE(of, hi3798cv200_crg_match_table);
 279
 280 static int hi3798cv200_crg_probe(struct platform_device *pdev)
 281 {
 282         struct hisi_crg_dev *crg;
 283
 284         crg = devm_kmalloc(&pdev->dev, sizeof(*crg), GFP_KERNEL);
 285         if (!crg)
 286                 return -ENOMEM;
 287
 288         crg->funcs = of_device_get_match_data(&pdev->dev);
 289         if (!crg->funcs)
 290                 return -ENOENT;
 291
 292         crg->rstc = hisi_reset_init(pdev);
 293         if (!crg->rstc)
 294                 return -ENOMEM;
 295
 296         crg->clk_data = crg->funcs->register_clks(pdev);
 297         if (IS_ERR(crg->clk_data)) {
 298                 hisi_reset_exit(crg->rstc);
 299                 return PTR_ERR(crg->clk_data);
 300         }
 301
 302         platform_set_drvdata(pdev, crg);
 303         return 0;
 304 }
 305
 306 static int hi3798cv200_crg_remove(struct platform_device *pdev)
 307 {
 308         struct hisi_crg_dev *crg = platform_get_drvdata(pdev);
 309
 310         hisi_reset_exit(crg->rstc);
 311         crg->funcs->unregister_clks(pdev);
 312         return 0;
 313 }
 314
 315 static struct platform_driver hi3798cv200_crg_driver = {
 316         .probe          = hi3798cv200_crg_probe,
 317         .remove         = hi3798cv200_crg_remove,
 318         .driver         = {
 319                 .name   = "hi3798cv200-crg",
 320                 .of_match_table = hi3798cv200_crg_match_table,
 321         },
 322 };
 323
 324 static int __init hi3798cv200_crg_init(void)
 325 {
 326         return platform_driver_register(&hi3798cv200_crg_driver);
 327 }
 328 core_initcall(hi3798cv200_crg_init);
 329
 330 static void __exit hi3798cv200_crg_exit(void)
 331 {
 332         platform_driver_unregister(&hi3798cv200_crg_driver);
 333 }
 334 module_exit(hi3798cv200_crg_exit);
 335
 336 MODULE_LICENSE("GPL v2");
 337 MODULE_DESCRIPTION("HiSilicon Hi3798CV200 CRG Driver");