1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * ZynqMP clock driver 4 * 5 * Copyright (C) 2016 Xilinx, Inc. 6 */ 7 8 #include <common.h> 9 #include <linux/bitops.h> 10 #include <clk-uclass.h> 11 #include <clk.h> 12 #include <asm/arch/sys_proto.h> 13 #include <dm.h> 14 15 static const resource_size_t zynqmp_crf_apb_clkc_base = 0xfd1a0020; 16 static const resource_size_t zynqmp_crl_apb_clkc_base = 0xff5e0020; 17 18 /* Full power domain clocks */ 19 #define CRF_APB_APLL_CTRL (zynqmp_crf_apb_clkc_base + 0x00) 20 #define CRF_APB_DPLL_CTRL (zynqmp_crf_apb_clkc_base + 0x0c) 21 #define CRF_APB_VPLL_CTRL (zynqmp_crf_apb_clkc_base + 0x18) 22 #define CRF_APB_PLL_STATUS (zynqmp_crf_apb_clkc_base + 0x24) 23 #define CRF_APB_APLL_TO_LPD_CTRL (zynqmp_crf_apb_clkc_base + 0x28) 24 #define CRF_APB_DPLL_TO_LPD_CTRL (zynqmp_crf_apb_clkc_base + 0x2c) 25 #define CRF_APB_VPLL_TO_LPD_CTRL (zynqmp_crf_apb_clkc_base + 0x30) 26 /* Peripheral clocks */ 27 #define CRF_APB_ACPU_CTRL (zynqmp_crf_apb_clkc_base + 0x40) 28 #define CRF_APB_DBG_TRACE_CTRL (zynqmp_crf_apb_clkc_base + 0x44) 29 #define CRF_APB_DBG_FPD_CTRL (zynqmp_crf_apb_clkc_base + 0x48) 30 #define CRF_APB_DP_VIDEO_REF_CTRL (zynqmp_crf_apb_clkc_base + 0x50) 31 #define CRF_APB_DP_AUDIO_REF_CTRL (zynqmp_crf_apb_clkc_base + 0x54) 32 #define CRF_APB_DP_STC_REF_CTRL (zynqmp_crf_apb_clkc_base + 0x5c) 33 #define CRF_APB_DDR_CTRL (zynqmp_crf_apb_clkc_base + 0x60) 34 #define CRF_APB_GPU_REF_CTRL (zynqmp_crf_apb_clkc_base + 0x64) 35 #define CRF_APB_SATA_REF_CTRL (zynqmp_crf_apb_clkc_base + 0x80) 36 #define CRF_APB_PCIE_REF_CTRL (zynqmp_crf_apb_clkc_base + 0x94) 37 #define CRF_APB_GDMA_REF_CTRL (zynqmp_crf_apb_clkc_base + 0x98) 38 #define CRF_APB_DPDMA_REF_CTRL (zynqmp_crf_apb_clkc_base + 0x9c) 39 #define CRF_APB_TOPSW_MAIN_CTRL (zynqmp_crf_apb_clkc_base + 0xa0) 40 #define CRF_APB_TOPSW_LSBUS_CTRL (zynqmp_crf_apb_clkc_base + 0xa4) 41 #define CRF_APB_GTGREF0_REF_CTRL (zynqmp_crf_apb_clkc_base + 0xa8) 42 #define CRF_APB_DBG_TSTMP_CTRL (zynqmp_crf_apb_clkc_base + 0xd8) 43 44 /* Low power domain clocks */ 45 #define CRL_APB_IOPLL_CTRL (zynqmp_crl_apb_clkc_base + 0x00) 46 #define CRL_APB_RPLL_CTRL (zynqmp_crl_apb_clkc_base + 0x10) 47 #define CRL_APB_PLL_STATUS (zynqmp_crl_apb_clkc_base + 0x20) 48 #define CRL_APB_IOPLL_TO_FPD_CTRL (zynqmp_crl_apb_clkc_base + 0x24) 49 #define CRL_APB_RPLL_TO_FPD_CTRL (zynqmp_crl_apb_clkc_base + 0x28) 50 /* Peripheral clocks */ 51 #define CRL_APB_USB3_DUAL_REF_CTRL (zynqmp_crl_apb_clkc_base + 0x2c) 52 #define CRL_APB_GEM0_REF_CTRL (zynqmp_crl_apb_clkc_base + 0x30) 53 #define CRL_APB_GEM1_REF_CTRL (zynqmp_crl_apb_clkc_base + 0x34) 54 #define CRL_APB_GEM2_REF_CTRL (zynqmp_crl_apb_clkc_base + 0x38) 55 #define CRL_APB_GEM3_REF_CTRL (zynqmp_crl_apb_clkc_base + 0x3c) 56 #define CRL_APB_USB0_BUS_REF_CTRL (zynqmp_crl_apb_clkc_base + 0x40) 57 #define CRL_APB_USB1_BUS_REF_CTRL (zynqmp_crl_apb_clkc_base + 0x44) 58 #define CRL_APB_QSPI_REF_CTRL (zynqmp_crl_apb_clkc_base + 0x48) 59 #define CRL_APB_SDIO0_REF_CTRL (zynqmp_crl_apb_clkc_base + 0x4c) 60 #define CRL_APB_SDIO1_REF_CTRL (zynqmp_crl_apb_clkc_base + 0x50) 61 #define CRL_APB_UART0_REF_CTRL (zynqmp_crl_apb_clkc_base + 0x54) 62 #define CRL_APB_UART1_REF_CTRL (zynqmp_crl_apb_clkc_base + 0x58) 63 #define CRL_APB_SPI0_REF_CTRL (zynqmp_crl_apb_clkc_base + 0x5c) 64 #define CRL_APB_SPI1_REF_CTRL (zynqmp_crl_apb_clkc_base + 0x60) 65 #define CRL_APB_CAN0_REF_CTRL (zynqmp_crl_apb_clkc_base + 0x64) 66 #define CRL_APB_CAN1_REF_CTRL (zynqmp_crl_apb_clkc_base + 0x68) 67 #define CRL_APB_CPU_R5_CTRL (zynqmp_crl_apb_clkc_base + 0x70) 68 #define CRL_APB_IOU_SWITCH_CTRL (zynqmp_crl_apb_clkc_base + 0x7c) 69 #define CRL_APB_CSU_PLL_CTRL (zynqmp_crl_apb_clkc_base + 0x80) 70 #define CRL_APB_PCAP_CTRL (zynqmp_crl_apb_clkc_base + 0x84) 71 #define CRL_APB_LPD_SWITCH_CTRL (zynqmp_crl_apb_clkc_base + 0x88) 72 #define CRL_APB_LPD_LSBUS_CTRL (zynqmp_crl_apb_clkc_base + 0x8c) 73 #define CRL_APB_DBG_LPD_CTRL (zynqmp_crl_apb_clkc_base + 0x90) 74 #define CRL_APB_NAND_REF_CTRL (zynqmp_crl_apb_clkc_base + 0x94) 75 #define CRL_APB_ADMA_REF_CTRL (zynqmp_crl_apb_clkc_base + 0x98) 76 #define CRL_APB_PL0_REF_CTRL (zynqmp_crl_apb_clkc_base + 0xa0) 77 #define CRL_APB_PL1_REF_CTRL (zynqmp_crl_apb_clkc_base + 0xa4) 78 #define CRL_APB_PL2_REF_CTRL (zynqmp_crl_apb_clkc_base + 0xa8) 79 #define CRL_APB_PL3_REF_CTRL (zynqmp_crl_apb_clkc_base + 0xac) 80 #define CRL_APB_PL0_THR_CNT (zynqmp_crl_apb_clkc_base + 0xb4) 81 #define CRL_APB_PL1_THR_CNT (zynqmp_crl_apb_clkc_base + 0xbc) 82 #define CRL_APB_PL2_THR_CNT (zynqmp_crl_apb_clkc_base + 0xc4) 83 #define CRL_APB_PL3_THR_CNT (zynqmp_crl_apb_clkc_base + 0xdc) 84 #define CRL_APB_GEM_TSU_REF_CTRL (zynqmp_crl_apb_clkc_base + 0xe0) 85 #define CRL_APB_DLL_REF_CTRL (zynqmp_crl_apb_clkc_base + 0xe4) 86 #define CRL_APB_AMS_REF_CTRL (zynqmp_crl_apb_clkc_base + 0xe8) 87 #define CRL_APB_I2C0_REF_CTRL (zynqmp_crl_apb_clkc_base + 0x100) 88 #define CRL_APB_I2C1_REF_CTRL (zynqmp_crl_apb_clkc_base + 0x104) 89 #define CRL_APB_TIMESTAMP_REF_CTRL (zynqmp_crl_apb_clkc_base + 0x108) 90 91 #define ZYNQ_CLK_MAXDIV 0x3f 92 #define CLK_CTRL_DIV1_SHIFT 16 93 #define CLK_CTRL_DIV1_MASK (ZYNQ_CLK_MAXDIV << CLK_CTRL_DIV1_SHIFT) 94 #define CLK_CTRL_DIV0_SHIFT 8 95 #define CLK_CTRL_DIV0_MASK (ZYNQ_CLK_MAXDIV << CLK_CTRL_DIV0_SHIFT) 96 #define CLK_CTRL_SRCSEL_SHIFT 0 97 #define CLK_CTRL_SRCSEL_MASK (0x3 << CLK_CTRL_SRCSEL_SHIFT) 98 #define PLLCTRL_FBDIV_MASK 0x7f00 99 #define PLLCTRL_FBDIV_SHIFT 8 100 #define PLLCTRL_RESET_MASK 1 101 #define PLLCTRL_RESET_SHIFT 0 102 #define PLLCTRL_BYPASS_MASK 0x8 103 #define PLLCTRL_BYPASS_SHFT 3 104 #define PLLCTRL_POST_SRC_SHFT 24 105 #define PLLCTRL_POST_SRC_MASK (0x7 << PLLCTRL_POST_SRC_SHFT) 106 107 108 #define NUM_MIO_PINS 77 109 110 enum zynqmp_clk { 111 iopll, rpll, 112 apll, dpll, vpll, 113 iopll_to_fpd, rpll_to_fpd, apll_to_lpd, dpll_to_lpd, vpll_to_lpd, 114 acpu, acpu_half, 115 dbg_fpd, dbg_lpd, dbg_trace, dbg_tstmp, 116 dp_video_ref, dp_audio_ref, 117 dp_stc_ref, gdma_ref, dpdma_ref, 118 ddr_ref, sata_ref, pcie_ref, 119 gpu_ref, gpu_pp0_ref, gpu_pp1_ref, 120 topsw_main, topsw_lsbus, 121 gtgref0_ref, 122 lpd_switch, lpd_lsbus, 123 usb0_bus_ref, usb1_bus_ref, usb3_dual_ref, usb0, usb1, 124 cpu_r5, cpu_r5_core, 125 csu_spb, csu_pll, pcap, 126 iou_switch, 127 gem_tsu_ref, gem_tsu, 128 gem0_ref, gem1_ref, gem2_ref, gem3_ref, 129 gem0_rx, gem1_rx, gem2_rx, gem3_rx, 130 qspi_ref, 131 sdio0_ref, sdio1_ref, 132 uart0_ref, uart1_ref, 133 spi0_ref, spi1_ref, 134 nand_ref, 135 i2c0_ref, i2c1_ref, can0_ref, can1_ref, can0, can1, 136 dll_ref, 137 adma_ref, 138 timestamp_ref, 139 ams_ref, 140 pl0, pl1, pl2, pl3, 141 wdt, 142 clk_max, 143 }; 144 145 static const char * const clk_names[clk_max] = { 146 "iopll", "rpll", "apll", "dpll", 147 "vpll", "iopll_to_fpd", "rpll_to_fpd", 148 "apll_to_lpd", "dpll_to_lpd", "vpll_to_lpd", 149 "acpu", "acpu_half", "dbf_fpd", "dbf_lpd", 150 "dbg_trace", "dbg_tstmp", "dp_video_ref", 151 "dp_audio_ref", "dp_stc_ref", "gdma_ref", 152 "dpdma_ref", "ddr_ref", "sata_ref", "pcie_ref", 153 "gpu_ref", "gpu_pp0_ref", "gpu_pp1_ref", 154 "topsw_main", "topsw_lsbus", "gtgref0_ref", 155 "lpd_switch", "lpd_lsbus", "usb0_bus_ref", 156 "usb1_bus_ref", "usb3_dual_ref", "usb0", 157 "usb1", "cpu_r5", "cpu_r5_core", "csu_spb", 158 "csu_pll", "pcap", "iou_switch", "gem_tsu_ref", 159 "gem_tsu", "gem0_ref", "gem1_ref", "gem2_ref", 160 "gem3_ref", "gem0_tx", "gem1_tx", "gem2_tx", 161 "gem3_tx", "qspi_ref", "sdio0_ref", "sdio1_ref", 162 "uart0_ref", "uart1_ref", "spi0_ref", 163 "spi1_ref", "nand_ref", "i2c0_ref", "i2c1_ref", 164 "can0_ref", "can1_ref", "can0", "can1", 165 "dll_ref", "adma_ref", "timestamp_ref", 166 "ams_ref", "pl0", "pl1", "pl2", "pl3", "wdt" 167 }; 168 169 struct zynqmp_clk_priv { 170 unsigned long ps_clk_freq; 171 unsigned long video_clk; 172 unsigned long pss_alt_ref_clk; 173 unsigned long gt_crx_ref_clk; 174 unsigned long aux_ref_clk; 175 }; 176 177 static u32 zynqmp_clk_get_register(enum zynqmp_clk id) 178 { 179 switch (id) { 180 case iopll: 181 return CRL_APB_IOPLL_CTRL; 182 case rpll: 183 return CRL_APB_RPLL_CTRL; 184 case apll: 185 return CRF_APB_APLL_CTRL; 186 case dpll: 187 return CRF_APB_DPLL_CTRL; 188 case vpll: 189 return CRF_APB_VPLL_CTRL; 190 case acpu: 191 return CRF_APB_ACPU_CTRL; 192 case ddr_ref: 193 return CRF_APB_DDR_CTRL; 194 case qspi_ref: 195 return CRL_APB_QSPI_REF_CTRL; 196 case gem0_ref: 197 return CRL_APB_GEM0_REF_CTRL; 198 case gem1_ref: 199 return CRL_APB_GEM1_REF_CTRL; 200 case gem2_ref: 201 return CRL_APB_GEM2_REF_CTRL; 202 case gem3_ref: 203 return CRL_APB_GEM3_REF_CTRL; 204 case uart0_ref: 205 return CRL_APB_UART0_REF_CTRL; 206 case uart1_ref: 207 return CRL_APB_UART1_REF_CTRL; 208 case sdio0_ref: 209 return CRL_APB_SDIO0_REF_CTRL; 210 case sdio1_ref: 211 return CRL_APB_SDIO1_REF_CTRL; 212 case spi0_ref: 213 return CRL_APB_SPI0_REF_CTRL; 214 case spi1_ref: 215 return CRL_APB_SPI1_REF_CTRL; 216 case nand_ref: 217 return CRL_APB_NAND_REF_CTRL; 218 case i2c0_ref: 219 return CRL_APB_I2C0_REF_CTRL; 220 case i2c1_ref: 221 return CRL_APB_I2C1_REF_CTRL; 222 case can0_ref: 223 return CRL_APB_CAN0_REF_CTRL; 224 case can1_ref: 225 return CRL_APB_CAN1_REF_CTRL; 226 case pl0: 227 return CRL_APB_PL0_REF_CTRL; 228 case pl1: 229 return CRL_APB_PL1_REF_CTRL; 230 case pl2: 231 return CRL_APB_PL2_REF_CTRL; 232 case pl3: 233 return CRL_APB_PL3_REF_CTRL; 234 case wdt: 235 return CRF_APB_TOPSW_LSBUS_CTRL; 236 case iopll_to_fpd: 237 return CRL_APB_IOPLL_TO_FPD_CTRL; 238 default: 239 debug("Invalid clk id%d\n", id); 240 } 241 return 0; 242 } 243 244 static enum zynqmp_clk zynqmp_clk_get_cpu_pll(u32 clk_ctrl) 245 { 246 u32 srcsel = (clk_ctrl & CLK_CTRL_SRCSEL_MASK) >> 247 CLK_CTRL_SRCSEL_SHIFT; 248 249 switch (srcsel) { 250 case 2: 251 return dpll; 252 case 3: 253 return vpll; 254 case 0 ... 1: 255 default: 256 return apll; 257 } 258 } 259 260 static enum zynqmp_clk zynqmp_clk_get_ddr_pll(u32 clk_ctrl) 261 { 262 u32 srcsel = (clk_ctrl & CLK_CTRL_SRCSEL_MASK) >> 263 CLK_CTRL_SRCSEL_SHIFT; 264 265 switch (srcsel) { 266 case 1: 267 return vpll; 268 case 0: 269 default: 270 return dpll; 271 } 272 } 273 274 static enum zynqmp_clk zynqmp_clk_get_peripheral_pll(u32 clk_ctrl) 275 { 276 u32 srcsel = (clk_ctrl & CLK_CTRL_SRCSEL_MASK) >> 277 CLK_CTRL_SRCSEL_SHIFT; 278 279 switch (srcsel) { 280 case 2: 281 return rpll; 282 case 3: 283 return dpll; 284 case 0 ... 1: 285 default: 286 return iopll; 287 } 288 } 289 290 static enum zynqmp_clk zynqmp_clk_get_wdt_pll(u32 clk_ctrl) 291 { 292 u32 srcsel = (clk_ctrl & CLK_CTRL_SRCSEL_MASK) >> 293 CLK_CTRL_SRCSEL_SHIFT; 294 295 switch (srcsel) { 296 case 2: 297 return iopll_to_fpd; 298 case 3: 299 return dpll; 300 case 0 ... 1: 301 default: 302 return apll; 303 } 304 } 305 306 static ulong zynqmp_clk_get_pll_src(ulong clk_ctrl, 307 struct zynqmp_clk_priv *priv, 308 bool is_pre_src) 309 { 310 u32 src_sel; 311 312 if (is_pre_src) 313 src_sel = (clk_ctrl & PLLCTRL_POST_SRC_MASK) >> 314 PLLCTRL_POST_SRC_SHFT; 315 else 316 src_sel = (clk_ctrl & PLLCTRL_POST_SRC_MASK) >> 317 PLLCTRL_POST_SRC_SHFT; 318 319 switch (src_sel) { 320 case 4: 321 return priv->video_clk; 322 case 5: 323 return priv->pss_alt_ref_clk; 324 case 6: 325 return priv->aux_ref_clk; 326 case 7: 327 return priv->gt_crx_ref_clk; 328 case 0 ... 3: 329 default: 330 return priv->ps_clk_freq; 331 } 332 } 333 334 static ulong zynqmp_clk_get_pll_rate(struct zynqmp_clk_priv *priv, 335 enum zynqmp_clk id) 336 { 337 u32 clk_ctrl, reset, mul; 338 ulong freq; 339 int ret; 340 341 ret = zynqmp_mmio_read(zynqmp_clk_get_register(id), &clk_ctrl); 342 if (ret) { 343 printf("%s mio read fail\n", __func__); 344 return -EIO; 345 } 346 347 if (clk_ctrl & PLLCTRL_BYPASS_MASK) 348 freq = zynqmp_clk_get_pll_src(clk_ctrl, priv, 0); 349 else 350 freq = zynqmp_clk_get_pll_src(clk_ctrl, priv, 1); 351 352 reset = (clk_ctrl & PLLCTRL_RESET_MASK) >> PLLCTRL_RESET_SHIFT; 353 if (reset && !(clk_ctrl & PLLCTRL_BYPASS_MASK)) 354 return 0; 355 356 mul = (clk_ctrl & PLLCTRL_FBDIV_MASK) >> PLLCTRL_FBDIV_SHIFT; 357 358 freq *= mul; 359 360 if (clk_ctrl & (1 << 16)) 361 freq /= 2; 362 363 return freq; 364 } 365 366 static ulong zynqmp_clk_get_cpu_rate(struct zynqmp_clk_priv *priv, 367 enum zynqmp_clk id) 368 { 369 u32 clk_ctrl, div; 370 enum zynqmp_clk pll; 371 int ret; 372 unsigned long pllrate; 373 374 ret = zynqmp_mmio_read(CRF_APB_ACPU_CTRL, &clk_ctrl); 375 if (ret) { 376 printf("%s mio read fail\n", __func__); 377 return -EIO; 378 } 379 380 div = (clk_ctrl & CLK_CTRL_DIV0_MASK) >> CLK_CTRL_DIV0_SHIFT; 381 382 pll = zynqmp_clk_get_cpu_pll(clk_ctrl); 383 pllrate = zynqmp_clk_get_pll_rate(priv, pll); 384 if (IS_ERR_VALUE(pllrate)) 385 return pllrate; 386 387 return DIV_ROUND_CLOSEST(pllrate, div); 388 } 389 390 static ulong zynqmp_clk_get_ddr_rate(struct zynqmp_clk_priv *priv) 391 { 392 u32 clk_ctrl, div; 393 enum zynqmp_clk pll; 394 int ret; 395 ulong pllrate; 396 397 ret = zynqmp_mmio_read(CRF_APB_DDR_CTRL, &clk_ctrl); 398 if (ret) { 399 printf("%s mio read fail\n", __func__); 400 return -EIO; 401 } 402 403 div = (clk_ctrl & CLK_CTRL_DIV0_MASK) >> CLK_CTRL_DIV0_SHIFT; 404 405 pll = zynqmp_clk_get_ddr_pll(clk_ctrl); 406 pllrate = zynqmp_clk_get_pll_rate(priv, pll); 407 if (IS_ERR_VALUE(pllrate)) 408 return pllrate; 409 410 return DIV_ROUND_CLOSEST(pllrate, div); 411 } 412 413 static ulong zynqmp_clk_get_peripheral_rate(struct zynqmp_clk_priv *priv, 414 enum zynqmp_clk id, bool two_divs) 415 { 416 enum zynqmp_clk pll; 417 u32 clk_ctrl, div0; 418 u32 div1 = 1; 419 int ret; 420 ulong pllrate; 421 422 ret = zynqmp_mmio_read(zynqmp_clk_get_register(id), &clk_ctrl); 423 if (ret) { 424 printf("%s mio read fail\n", __func__); 425 return -EIO; 426 } 427 428 div0 = (clk_ctrl & CLK_CTRL_DIV0_MASK) >> CLK_CTRL_DIV0_SHIFT; 429 if (!div0) 430 div0 = 1; 431 432 if (two_divs) { 433 div1 = (clk_ctrl & CLK_CTRL_DIV1_MASK) >> CLK_CTRL_DIV1_SHIFT; 434 if (!div1) 435 div1 = 1; 436 } 437 438 pll = zynqmp_clk_get_peripheral_pll(clk_ctrl); 439 pllrate = zynqmp_clk_get_pll_rate(priv, pll); 440 if (IS_ERR_VALUE(pllrate)) 441 return pllrate; 442 443 return 444 DIV_ROUND_CLOSEST( 445 DIV_ROUND_CLOSEST(pllrate, div0), div1); 446 } 447 448 static ulong zynqmp_clk_get_wdt_rate(struct zynqmp_clk_priv *priv, 449 enum zynqmp_clk id, bool two_divs) 450 { 451 enum zynqmp_clk pll; 452 u32 clk_ctrl, div0; 453 u32 div1 = 1; 454 int ret; 455 ulong pllrate; 456 457 ret = zynqmp_mmio_read(zynqmp_clk_get_register(id), &clk_ctrl); 458 if (ret) { 459 printf("%d %s mio read fail\n", __LINE__, __func__); 460 return -EIO; 461 } 462 463 div0 = (clk_ctrl & CLK_CTRL_DIV0_MASK) >> CLK_CTRL_DIV0_SHIFT; 464 if (!div0) 465 div0 = 1; 466 467 pll = zynqmp_clk_get_wdt_pll(clk_ctrl); 468 if (two_divs) { 469 ret = zynqmp_mmio_read(zynqmp_clk_get_register(pll), &clk_ctrl); 470 if (ret) { 471 printf("%d %s mio read fail\n", __LINE__, __func__); 472 return -EIO; 473 } 474 div1 = (clk_ctrl & CLK_CTRL_DIV0_MASK) >> CLK_CTRL_DIV0_SHIFT; 475 if (!div1) 476 div1 = 1; 477 } 478 479 if (pll == iopll_to_fpd) 480 pll = iopll; 481 482 pllrate = zynqmp_clk_get_pll_rate(priv, pll); 483 if (IS_ERR_VALUE(pllrate)) 484 return pllrate; 485 486 return 487 DIV_ROUND_CLOSEST( 488 DIV_ROUND_CLOSEST(pllrate, div0), div1); 489 } 490 491 static unsigned long zynqmp_clk_calc_peripheral_two_divs(ulong rate, 492 ulong pll_rate, 493 u32 *div0, u32 *div1) 494 { 495 long new_err, best_err = (long)(~0UL >> 1); 496 ulong new_rate, best_rate = 0; 497 u32 d0, d1; 498 499 for (d0 = 1; d0 <= ZYNQ_CLK_MAXDIV; d0++) { 500 for (d1 = 1; d1 <= ZYNQ_CLK_MAXDIV >> 1; d1++) { 501 new_rate = DIV_ROUND_CLOSEST( 502 DIV_ROUND_CLOSEST(pll_rate, d0), d1); 503 new_err = abs(new_rate - rate); 504 505 if (new_err < best_err) { 506 *div0 = d0; 507 *div1 = d1; 508 best_err = new_err; 509 best_rate = new_rate; 510 } 511 } 512 } 513 514 return best_rate; 515 } 516 517 static ulong zynqmp_clk_set_peripheral_rate(struct zynqmp_clk_priv *priv, 518 enum zynqmp_clk id, ulong rate, 519 bool two_divs) 520 { 521 enum zynqmp_clk pll; 522 u32 clk_ctrl, div0 = 0, div1 = 0; 523 ulong pll_rate, new_rate; 524 u32 reg; 525 int ret; 526 u32 mask; 527 528 reg = zynqmp_clk_get_register(id); 529 ret = zynqmp_mmio_read(reg, &clk_ctrl); 530 if (ret) { 531 printf("%s mio read fail\n", __func__); 532 return -EIO; 533 } 534 535 pll = zynqmp_clk_get_peripheral_pll(clk_ctrl); 536 pll_rate = zynqmp_clk_get_pll_rate(priv, pll); 537 if (IS_ERR_VALUE(pll_rate)) 538 return pll_rate; 539 540 clk_ctrl &= ~CLK_CTRL_DIV0_MASK; 541 if (two_divs) { 542 clk_ctrl &= ~CLK_CTRL_DIV1_MASK; 543 new_rate = zynqmp_clk_calc_peripheral_two_divs(rate, pll_rate, 544 &div0, &div1); 545 clk_ctrl |= div1 << CLK_CTRL_DIV1_SHIFT; 546 } else { 547 div0 = DIV_ROUND_CLOSEST(pll_rate, rate); 548 if (div0 > ZYNQ_CLK_MAXDIV) 549 div0 = ZYNQ_CLK_MAXDIV; 550 new_rate = DIV_ROUND_CLOSEST(rate, div0); 551 } 552 clk_ctrl |= div0 << CLK_CTRL_DIV0_SHIFT; 553 554 mask = (ZYNQ_CLK_MAXDIV << CLK_CTRL_DIV0_SHIFT) | 555 (ZYNQ_CLK_MAXDIV << CLK_CTRL_DIV1_SHIFT); 556 557 ret = zynqmp_mmio_write(reg, mask, clk_ctrl); 558 if (ret) { 559 printf("%s mio write fail\n", __func__); 560 return -EIO; 561 } 562 563 return new_rate; 564 } 565 566 static ulong zynqmp_clk_get_rate(struct clk *clk) 567 { 568 struct zynqmp_clk_priv *priv = dev_get_priv(clk->dev); 569 enum zynqmp_clk id = clk->id; 570 bool two_divs = false; 571 572 switch (id) { 573 case iopll ... vpll: 574 return zynqmp_clk_get_pll_rate(priv, id); 575 case acpu: 576 return zynqmp_clk_get_cpu_rate(priv, id); 577 case ddr_ref: 578 return zynqmp_clk_get_ddr_rate(priv); 579 case gem0_ref ... gem3_ref: 580 case qspi_ref ... can1_ref: 581 case pl0 ... pl3: 582 two_divs = true; 583 return zynqmp_clk_get_peripheral_rate(priv, id, two_divs); 584 case wdt: 585 two_divs = true; 586 return zynqmp_clk_get_wdt_rate(priv, id, two_divs); 587 default: 588 return -ENXIO; 589 } 590 } 591 592 static ulong zynqmp_clk_set_rate(struct clk *clk, ulong rate) 593 { 594 struct zynqmp_clk_priv *priv = dev_get_priv(clk->dev); 595 enum zynqmp_clk id = clk->id; 596 bool two_divs = true; 597 598 switch (id) { 599 case gem0_ref ... gem3_ref: 600 case qspi_ref ... can1_ref: 601 return zynqmp_clk_set_peripheral_rate(priv, id, 602 rate, two_divs); 603 default: 604 return -ENXIO; 605 } 606 } 607 608 int soc_clk_dump(void) 609 { 610 struct udevice *dev; 611 int i, ret; 612 613 ret = uclass_get_device_by_driver(UCLASS_CLK, 614 DM_GET_DRIVER(zynqmp_clk), &dev); 615 if (ret) 616 return ret; 617 618 printf("clk\t\tfrequency\n"); 619 for (i = 0; i < clk_max; i++) { 620 const char *name = clk_names[i]; 621 if (name) { 622 struct clk clk; 623 unsigned long rate; 624 625 clk.id = i; 626 ret = clk_request(dev, &clk); 627 if (ret < 0) 628 return ret; 629 630 rate = clk_get_rate(&clk); 631 632 clk_free(&clk); 633 634 if ((rate == (unsigned long)-ENOSYS) || 635 (rate == (unsigned long)-ENXIO) || 636 (rate == (unsigned long)-EIO)) 637 printf("%10s%20s\n", name, "unknown"); 638 else 639 printf("%10s%20lu\n", name, rate); 640 } 641 } 642 643 return 0; 644 } 645 646 static int zynqmp_get_freq_by_name(char *name, struct udevice *dev, ulong *freq) 647 { 648 struct clk clk; 649 int ret; 650 651 ret = clk_get_by_name(dev, name, &clk); 652 if (ret < 0) { 653 dev_err(dev, "failed to get %s\n", name); 654 return ret; 655 } 656 657 *freq = clk_get_rate(&clk); 658 if (IS_ERR_VALUE(*freq)) { 659 dev_err(dev, "failed to get rate %s\n", name); 660 return -EINVAL; 661 } 662 663 return 0; 664 } 665 static int zynqmp_clk_probe(struct udevice *dev) 666 { 667 int ret; 668 struct zynqmp_clk_priv *priv = dev_get_priv(dev); 669 670 debug("%s\n", __func__); 671 ret = zynqmp_get_freq_by_name("pss_ref_clk", dev, &priv->ps_clk_freq); 672 if (ret < 0) 673 return -EINVAL; 674 675 ret = zynqmp_get_freq_by_name("video_clk", dev, &priv->video_clk); 676 if (ret < 0) 677 return -EINVAL; 678 679 ret = zynqmp_get_freq_by_name("pss_alt_ref_clk", dev, 680 &priv->pss_alt_ref_clk); 681 if (ret < 0) 682 return -EINVAL; 683 684 ret = zynqmp_get_freq_by_name("aux_ref_clk", dev, &priv->aux_ref_clk); 685 if (ret < 0) 686 return -EINVAL; 687 688 ret = zynqmp_get_freq_by_name("gt_crx_ref_clk", dev, 689 &priv->gt_crx_ref_clk); 690 if (ret < 0) 691 return -EINVAL; 692 693 return 0; 694 } 695 696 static struct clk_ops zynqmp_clk_ops = { 697 .set_rate = zynqmp_clk_set_rate, 698 .get_rate = zynqmp_clk_get_rate, 699 }; 700 701 static const struct udevice_id zynqmp_clk_ids[] = { 702 { .compatible = "xlnx,zynqmp-clk" }, 703 { .compatible = "xlnx,zynqmp-clkc" }, 704 { } 705 }; 706 707 U_BOOT_DRIVER(zynqmp_clk) = { 708 .name = "zynqmp-clk", 709 .id = UCLASS_CLK, 710 .of_match = zynqmp_clk_ids, 711 .probe = zynqmp_clk_probe, 712 .ops = &zynqmp_clk_ops, 713 .priv_auto_alloc_size = sizeof(struct zynqmp_clk_priv), 714 }; 715