1 /* 2 * This program is free software; you can redistribute it and/or modify it 3 * under the terms of the GNU General Public License version 2 as published 4 * by the Free Software Foundation. 5 * 6 * Parts of this file are based on Ralink's 2.6.21 BSP 7 * 8 * Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org> 9 * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org> 10 * Copyright (C) 2013 John Crispin <john@phrozen.org> 11 */ 12 13 #include <linux/kernel.h> 14 #include <linux/init.h> 15 #include <linux/module.h> 16 17 #include <asm/mipsregs.h> 18 #include <asm/mach-ralink/ralink_regs.h> 19 #include <asm/mach-ralink/mt7620.h> 20 #include <asm/mach-ralink/pinmux.h> 21 22 #include "common.h" 23 24 /* analog */ 25 #define PMU0_CFG 0x88 26 #define PMU_SW_SET BIT(28) 27 #define A_DCDC_EN BIT(24) 28 #define A_SSC_PERI BIT(19) 29 #define A_SSC_GEN BIT(18) 30 #define A_SSC_M 0x3 31 #define A_SSC_S 16 32 #define A_DLY_M 0x7 33 #define A_DLY_S 8 34 #define A_VTUNE_M 0xff 35 36 /* digital */ 37 #define PMU1_CFG 0x8C 38 #define DIG_SW_SEL BIT(25) 39 40 /* clock scaling */ 41 #define CLKCFG_FDIV_MASK 0x1f00 42 #define CLKCFG_FDIV_USB_VAL 0x0300 43 #define CLKCFG_FFRAC_MASK 0x001f 44 #define CLKCFG_FFRAC_USB_VAL 0x0003 45 46 /* EFUSE bits */ 47 #define EFUSE_MT7688 0x100000 48 49 /* DRAM type bit */ 50 #define DRAM_TYPE_MT7628_MASK 0x1 51 52 /* does the board have sdram or ddram */ 53 static int dram_type; 54 55 static struct rt2880_pmx_func i2c_grp[] = { FUNC("i2c", 0, 1, 2) }; 56 static struct rt2880_pmx_func spi_grp[] = { FUNC("spi", 0, 3, 4) }; 57 static struct rt2880_pmx_func uartlite_grp[] = { FUNC("uartlite", 0, 15, 2) }; 58 static struct rt2880_pmx_func mdio_grp[] = { 59 FUNC("mdio", MT7620_GPIO_MODE_MDIO, 22, 2), 60 FUNC("refclk", MT7620_GPIO_MODE_MDIO_REFCLK, 22, 2), 61 }; 62 static struct rt2880_pmx_func rgmii1_grp[] = { FUNC("rgmii1", 0, 24, 12) }; 63 static struct rt2880_pmx_func refclk_grp[] = { FUNC("spi refclk", 0, 37, 3) }; 64 static struct rt2880_pmx_func ephy_grp[] = { FUNC("ephy", 0, 40, 5) }; 65 static struct rt2880_pmx_func rgmii2_grp[] = { FUNC("rgmii2", 0, 60, 12) }; 66 static struct rt2880_pmx_func wled_grp[] = { FUNC("wled", 0, 72, 1) }; 67 static struct rt2880_pmx_func pa_grp[] = { FUNC("pa", 0, 18, 4) }; 68 static struct rt2880_pmx_func uartf_grp[] = { 69 FUNC("uartf", MT7620_GPIO_MODE_UARTF, 7, 8), 70 FUNC("pcm uartf", MT7620_GPIO_MODE_PCM_UARTF, 7, 8), 71 FUNC("pcm i2s", MT7620_GPIO_MODE_PCM_I2S, 7, 8), 72 FUNC("i2s uartf", MT7620_GPIO_MODE_I2S_UARTF, 7, 8), 73 FUNC("pcm gpio", MT7620_GPIO_MODE_PCM_GPIO, 11, 4), 74 FUNC("gpio uartf", MT7620_GPIO_MODE_GPIO_UARTF, 7, 4), 75 FUNC("gpio i2s", MT7620_GPIO_MODE_GPIO_I2S, 7, 4), 76 }; 77 static struct rt2880_pmx_func wdt_grp[] = { 78 FUNC("wdt rst", 0, 17, 1), 79 FUNC("wdt refclk", 0, 17, 1), 80 }; 81 static struct rt2880_pmx_func pcie_rst_grp[] = { 82 FUNC("pcie rst", MT7620_GPIO_MODE_PCIE_RST, 36, 1), 83 FUNC("pcie refclk", MT7620_GPIO_MODE_PCIE_REF, 36, 1) 84 }; 85 static struct rt2880_pmx_func nd_sd_grp[] = { 86 FUNC("nand", MT7620_GPIO_MODE_NAND, 45, 15), 87 FUNC("sd", MT7620_GPIO_MODE_SD, 45, 15) 88 }; 89 90 static struct rt2880_pmx_group mt7620a_pinmux_data[] = { 91 GRP("i2c", i2c_grp, 1, MT7620_GPIO_MODE_I2C), 92 GRP("uartf", uartf_grp, MT7620_GPIO_MODE_UART0_MASK, 93 MT7620_GPIO_MODE_UART0_SHIFT), 94 GRP("spi", spi_grp, 1, MT7620_GPIO_MODE_SPI), 95 GRP("uartlite", uartlite_grp, 1, MT7620_GPIO_MODE_UART1), 96 GRP_G("wdt", wdt_grp, MT7620_GPIO_MODE_WDT_MASK, 97 MT7620_GPIO_MODE_WDT_GPIO, MT7620_GPIO_MODE_WDT_SHIFT), 98 GRP_G("mdio", mdio_grp, MT7620_GPIO_MODE_MDIO_MASK, 99 MT7620_GPIO_MODE_MDIO_GPIO, MT7620_GPIO_MODE_MDIO_SHIFT), 100 GRP("rgmii1", rgmii1_grp, 1, MT7620_GPIO_MODE_RGMII1), 101 GRP("spi refclk", refclk_grp, 1, MT7620_GPIO_MODE_SPI_REF_CLK), 102 GRP_G("pcie", pcie_rst_grp, MT7620_GPIO_MODE_PCIE_MASK, 103 MT7620_GPIO_MODE_PCIE_GPIO, MT7620_GPIO_MODE_PCIE_SHIFT), 104 GRP_G("nd_sd", nd_sd_grp, MT7620_GPIO_MODE_ND_SD_MASK, 105 MT7620_GPIO_MODE_ND_SD_GPIO, MT7620_GPIO_MODE_ND_SD_SHIFT), 106 GRP("rgmii2", rgmii2_grp, 1, MT7620_GPIO_MODE_RGMII2), 107 GRP("wled", wled_grp, 1, MT7620_GPIO_MODE_WLED), 108 GRP("ephy", ephy_grp, 1, MT7620_GPIO_MODE_EPHY), 109 GRP("pa", pa_grp, 1, MT7620_GPIO_MODE_PA), 110 { 0 } 111 }; 112 113 static struct rt2880_pmx_func pwm1_grp_mt7628[] = { 114 FUNC("sdxc d6", 3, 19, 1), 115 FUNC("utif", 2, 19, 1), 116 FUNC("gpio", 1, 19, 1), 117 FUNC("pwm1", 0, 19, 1), 118 }; 119 120 static struct rt2880_pmx_func pwm0_grp_mt7628[] = { 121 FUNC("sdxc d7", 3, 18, 1), 122 FUNC("utif", 2, 18, 1), 123 FUNC("gpio", 1, 18, 1), 124 FUNC("pwm0", 0, 18, 1), 125 }; 126 127 static struct rt2880_pmx_func uart2_grp_mt7628[] = { 128 FUNC("sdxc d5 d4", 3, 20, 2), 129 FUNC("pwm", 2, 20, 2), 130 FUNC("gpio", 1, 20, 2), 131 FUNC("uart2", 0, 20, 2), 132 }; 133 134 static struct rt2880_pmx_func uart1_grp_mt7628[] = { 135 FUNC("sw_r", 3, 45, 2), 136 FUNC("pwm", 2, 45, 2), 137 FUNC("gpio", 1, 45, 2), 138 FUNC("uart1", 0, 45, 2), 139 }; 140 141 static struct rt2880_pmx_func i2c_grp_mt7628[] = { 142 FUNC("-", 3, 4, 2), 143 FUNC("debug", 2, 4, 2), 144 FUNC("gpio", 1, 4, 2), 145 FUNC("i2c", 0, 4, 2), 146 }; 147 148 static struct rt2880_pmx_func refclk_grp_mt7628[] = { FUNC("reclk", 0, 36, 1) }; 149 static struct rt2880_pmx_func perst_grp_mt7628[] = { FUNC("perst", 0, 37, 1) }; 150 static struct rt2880_pmx_func wdt_grp_mt7628[] = { FUNC("wdt", 0, 38, 1) }; 151 static struct rt2880_pmx_func spi_grp_mt7628[] = { FUNC("spi", 0, 7, 4) }; 152 153 static struct rt2880_pmx_func sd_mode_grp_mt7628[] = { 154 FUNC("jtag", 3, 22, 8), 155 FUNC("utif", 2, 22, 8), 156 FUNC("gpio", 1, 22, 8), 157 FUNC("sdxc", 0, 22, 8), 158 }; 159 160 static struct rt2880_pmx_func uart0_grp_mt7628[] = { 161 FUNC("-", 3, 12, 2), 162 FUNC("-", 2, 12, 2), 163 FUNC("gpio", 1, 12, 2), 164 FUNC("uart0", 0, 12, 2), 165 }; 166 167 static struct rt2880_pmx_func i2s_grp_mt7628[] = { 168 FUNC("antenna", 3, 0, 4), 169 FUNC("pcm", 2, 0, 4), 170 FUNC("gpio", 1, 0, 4), 171 FUNC("i2s", 0, 0, 4), 172 }; 173 174 static struct rt2880_pmx_func spi_cs1_grp_mt7628[] = { 175 FUNC("-", 3, 6, 1), 176 FUNC("refclk", 2, 6, 1), 177 FUNC("gpio", 1, 6, 1), 178 FUNC("spi cs1", 0, 6, 1), 179 }; 180 181 static struct rt2880_pmx_func spis_grp_mt7628[] = { 182 FUNC("pwm_uart2", 3, 14, 4), 183 FUNC("util", 2, 14, 4), 184 FUNC("gpio", 1, 14, 4), 185 FUNC("spis", 0, 14, 4), 186 }; 187 188 static struct rt2880_pmx_func gpio_grp_mt7628[] = { 189 FUNC("pcie", 3, 11, 1), 190 FUNC("refclk", 2, 11, 1), 191 FUNC("gpio", 1, 11, 1), 192 FUNC("gpio", 0, 11, 1), 193 }; 194 195 static struct rt2880_pmx_func p4led_kn_grp_mt7628[] = { 196 FUNC("jtag", 3, 30, 1), 197 FUNC("util", 2, 30, 1), 198 FUNC("gpio", 1, 30, 1), 199 FUNC("p4led_kn", 0, 30, 1), 200 }; 201 202 static struct rt2880_pmx_func p3led_kn_grp_mt7628[] = { 203 FUNC("jtag", 3, 31, 1), 204 FUNC("util", 2, 31, 1), 205 FUNC("gpio", 1, 31, 1), 206 FUNC("p3led_kn", 0, 31, 1), 207 }; 208 209 static struct rt2880_pmx_func p2led_kn_grp_mt7628[] = { 210 FUNC("jtag", 3, 32, 1), 211 FUNC("util", 2, 32, 1), 212 FUNC("gpio", 1, 32, 1), 213 FUNC("p2led_kn", 0, 32, 1), 214 }; 215 216 static struct rt2880_pmx_func p1led_kn_grp_mt7628[] = { 217 FUNC("jtag", 3, 33, 1), 218 FUNC("util", 2, 33, 1), 219 FUNC("gpio", 1, 33, 1), 220 FUNC("p1led_kn", 0, 33, 1), 221 }; 222 223 static struct rt2880_pmx_func p0led_kn_grp_mt7628[] = { 224 FUNC("jtag", 3, 34, 1), 225 FUNC("rsvd", 2, 34, 1), 226 FUNC("gpio", 1, 34, 1), 227 FUNC("p0led_kn", 0, 34, 1), 228 }; 229 230 static struct rt2880_pmx_func wled_kn_grp_mt7628[] = { 231 FUNC("rsvd", 3, 35, 1), 232 FUNC("rsvd", 2, 35, 1), 233 FUNC("gpio", 1, 35, 1), 234 FUNC("wled_kn", 0, 35, 1), 235 }; 236 237 static struct rt2880_pmx_func p4led_an_grp_mt7628[] = { 238 FUNC("jtag", 3, 39, 1), 239 FUNC("util", 2, 39, 1), 240 FUNC("gpio", 1, 39, 1), 241 FUNC("p4led_an", 0, 39, 1), 242 }; 243 244 static struct rt2880_pmx_func p3led_an_grp_mt7628[] = { 245 FUNC("jtag", 3, 40, 1), 246 FUNC("util", 2, 40, 1), 247 FUNC("gpio", 1, 40, 1), 248 FUNC("p3led_an", 0, 40, 1), 249 }; 250 251 static struct rt2880_pmx_func p2led_an_grp_mt7628[] = { 252 FUNC("jtag", 3, 41, 1), 253 FUNC("util", 2, 41, 1), 254 FUNC("gpio", 1, 41, 1), 255 FUNC("p2led_an", 0, 41, 1), 256 }; 257 258 static struct rt2880_pmx_func p1led_an_grp_mt7628[] = { 259 FUNC("jtag", 3, 42, 1), 260 FUNC("util", 2, 42, 1), 261 FUNC("gpio", 1, 42, 1), 262 FUNC("p1led_an", 0, 42, 1), 263 }; 264 265 static struct rt2880_pmx_func p0led_an_grp_mt7628[] = { 266 FUNC("jtag", 3, 43, 1), 267 FUNC("rsvd", 2, 43, 1), 268 FUNC("gpio", 1, 43, 1), 269 FUNC("p0led_an", 0, 43, 1), 270 }; 271 272 static struct rt2880_pmx_func wled_an_grp_mt7628[] = { 273 FUNC("rsvd", 3, 44, 1), 274 FUNC("rsvd", 2, 44, 1), 275 FUNC("gpio", 1, 44, 1), 276 FUNC("wled_an", 0, 44, 1), 277 }; 278 279 #define MT7628_GPIO_MODE_MASK 0x3 280 281 #define MT7628_GPIO_MODE_P4LED_KN 58 282 #define MT7628_GPIO_MODE_P3LED_KN 56 283 #define MT7628_GPIO_MODE_P2LED_KN 54 284 #define MT7628_GPIO_MODE_P1LED_KN 52 285 #define MT7628_GPIO_MODE_P0LED_KN 50 286 #define MT7628_GPIO_MODE_WLED_KN 48 287 #define MT7628_GPIO_MODE_P4LED_AN 42 288 #define MT7628_GPIO_MODE_P3LED_AN 40 289 #define MT7628_GPIO_MODE_P2LED_AN 38 290 #define MT7628_GPIO_MODE_P1LED_AN 36 291 #define MT7628_GPIO_MODE_P0LED_AN 34 292 #define MT7628_GPIO_MODE_WLED_AN 32 293 #define MT7628_GPIO_MODE_PWM1 30 294 #define MT7628_GPIO_MODE_PWM0 28 295 #define MT7628_GPIO_MODE_UART2 26 296 #define MT7628_GPIO_MODE_UART1 24 297 #define MT7628_GPIO_MODE_I2C 20 298 #define MT7628_GPIO_MODE_REFCLK 18 299 #define MT7628_GPIO_MODE_PERST 16 300 #define MT7628_GPIO_MODE_WDT 14 301 #define MT7628_GPIO_MODE_SPI 12 302 #define MT7628_GPIO_MODE_SDMODE 10 303 #define MT7628_GPIO_MODE_UART0 8 304 #define MT7628_GPIO_MODE_I2S 6 305 #define MT7628_GPIO_MODE_CS1 4 306 #define MT7628_GPIO_MODE_SPIS 2 307 #define MT7628_GPIO_MODE_GPIO 0 308 309 static struct rt2880_pmx_group mt7628an_pinmux_data[] = { 310 GRP_G("pwm1", pwm1_grp_mt7628, MT7628_GPIO_MODE_MASK, 311 1, MT7628_GPIO_MODE_PWM1), 312 GRP_G("pwm0", pwm0_grp_mt7628, MT7628_GPIO_MODE_MASK, 313 1, MT7628_GPIO_MODE_PWM0), 314 GRP_G("uart2", uart2_grp_mt7628, MT7628_GPIO_MODE_MASK, 315 1, MT7628_GPIO_MODE_UART2), 316 GRP_G("uart1", uart1_grp_mt7628, MT7628_GPIO_MODE_MASK, 317 1, MT7628_GPIO_MODE_UART1), 318 GRP_G("i2c", i2c_grp_mt7628, MT7628_GPIO_MODE_MASK, 319 1, MT7628_GPIO_MODE_I2C), 320 GRP("refclk", refclk_grp_mt7628, 1, MT7628_GPIO_MODE_REFCLK), 321 GRP("perst", perst_grp_mt7628, 1, MT7628_GPIO_MODE_PERST), 322 GRP("wdt", wdt_grp_mt7628, 1, MT7628_GPIO_MODE_WDT), 323 GRP("spi", spi_grp_mt7628, 1, MT7628_GPIO_MODE_SPI), 324 GRP_G("sdmode", sd_mode_grp_mt7628, MT7628_GPIO_MODE_MASK, 325 1, MT7628_GPIO_MODE_SDMODE), 326 GRP_G("uart0", uart0_grp_mt7628, MT7628_GPIO_MODE_MASK, 327 1, MT7628_GPIO_MODE_UART0), 328 GRP_G("i2s", i2s_grp_mt7628, MT7628_GPIO_MODE_MASK, 329 1, MT7628_GPIO_MODE_I2S), 330 GRP_G("spi cs1", spi_cs1_grp_mt7628, MT7628_GPIO_MODE_MASK, 331 1, MT7628_GPIO_MODE_CS1), 332 GRP_G("spis", spis_grp_mt7628, MT7628_GPIO_MODE_MASK, 333 1, MT7628_GPIO_MODE_SPIS), 334 GRP_G("gpio", gpio_grp_mt7628, MT7628_GPIO_MODE_MASK, 335 1, MT7628_GPIO_MODE_GPIO), 336 GRP_G("wled_an", wled_an_grp_mt7628, MT7628_GPIO_MODE_MASK, 337 1, MT7628_GPIO_MODE_WLED_AN), 338 GRP_G("p0led_an", p0led_an_grp_mt7628, MT7628_GPIO_MODE_MASK, 339 1, MT7628_GPIO_MODE_P0LED_AN), 340 GRP_G("p1led_an", p1led_an_grp_mt7628, MT7628_GPIO_MODE_MASK, 341 1, MT7628_GPIO_MODE_P1LED_AN), 342 GRP_G("p2led_an", p2led_an_grp_mt7628, MT7628_GPIO_MODE_MASK, 343 1, MT7628_GPIO_MODE_P2LED_AN), 344 GRP_G("p3led_an", p3led_an_grp_mt7628, MT7628_GPIO_MODE_MASK, 345 1, MT7628_GPIO_MODE_P3LED_AN), 346 GRP_G("p4led_an", p4led_an_grp_mt7628, MT7628_GPIO_MODE_MASK, 347 1, MT7628_GPIO_MODE_P4LED_AN), 348 GRP_G("wled_kn", wled_kn_grp_mt7628, MT7628_GPIO_MODE_MASK, 349 1, MT7628_GPIO_MODE_WLED_KN), 350 GRP_G("p0led_kn", p0led_kn_grp_mt7628, MT7628_GPIO_MODE_MASK, 351 1, MT7628_GPIO_MODE_P0LED_KN), 352 GRP_G("p1led_kn", p1led_kn_grp_mt7628, MT7628_GPIO_MODE_MASK, 353 1, MT7628_GPIO_MODE_P1LED_KN), 354 GRP_G("p2led_kn", p2led_kn_grp_mt7628, MT7628_GPIO_MODE_MASK, 355 1, MT7628_GPIO_MODE_P2LED_KN), 356 GRP_G("p3led_kn", p3led_kn_grp_mt7628, MT7628_GPIO_MODE_MASK, 357 1, MT7628_GPIO_MODE_P3LED_KN), 358 GRP_G("p4led_kn", p4led_kn_grp_mt7628, MT7628_GPIO_MODE_MASK, 359 1, MT7628_GPIO_MODE_P4LED_KN), 360 { 0 } 361 }; 362 363 static inline int is_mt76x8(void) 364 { 365 return ralink_soc == MT762X_SOC_MT7628AN || 366 ralink_soc == MT762X_SOC_MT7688; 367 } 368 369 static __init u32 370 mt7620_calc_rate(u32 ref_rate, u32 mul, u32 div) 371 { 372 u64 t; 373 374 t = ref_rate; 375 t *= mul; 376 do_div(t, div); 377 378 return t; 379 } 380 381 #define MHZ(x) ((x) * 1000 * 1000) 382 383 static __init unsigned long 384 mt7620_get_xtal_rate(void) 385 { 386 u32 reg; 387 388 reg = rt_sysc_r32(SYSC_REG_SYSTEM_CONFIG0); 389 if (reg & SYSCFG0_XTAL_FREQ_SEL) 390 return MHZ(40); 391 392 return MHZ(20); 393 } 394 395 static __init unsigned long 396 mt7620_get_periph_rate(unsigned long xtal_rate) 397 { 398 u32 reg; 399 400 reg = rt_sysc_r32(SYSC_REG_CLKCFG0); 401 if (reg & CLKCFG0_PERI_CLK_SEL) 402 return xtal_rate; 403 404 return MHZ(40); 405 } 406 407 static const u32 mt7620_clk_divider[] __initconst = { 2, 3, 4, 8 }; 408 409 static __init unsigned long 410 mt7620_get_cpu_pll_rate(unsigned long xtal_rate) 411 { 412 u32 reg; 413 u32 mul; 414 u32 div; 415 416 reg = rt_sysc_r32(SYSC_REG_CPLL_CONFIG0); 417 if (reg & CPLL_CFG0_BYPASS_REF_CLK) 418 return xtal_rate; 419 420 if ((reg & CPLL_CFG0_SW_CFG) == 0) 421 return MHZ(600); 422 423 mul = (reg >> CPLL_CFG0_PLL_MULT_RATIO_SHIFT) & 424 CPLL_CFG0_PLL_MULT_RATIO_MASK; 425 mul += 24; 426 if (reg & CPLL_CFG0_LC_CURFCK) 427 mul *= 2; 428 429 div = (reg >> CPLL_CFG0_PLL_DIV_RATIO_SHIFT) & 430 CPLL_CFG0_PLL_DIV_RATIO_MASK; 431 432 WARN_ON(div >= ARRAY_SIZE(mt7620_clk_divider)); 433 434 return mt7620_calc_rate(xtal_rate, mul, mt7620_clk_divider[div]); 435 } 436 437 static __init unsigned long 438 mt7620_get_pll_rate(unsigned long xtal_rate, unsigned long cpu_pll_rate) 439 { 440 u32 reg; 441 442 reg = rt_sysc_r32(SYSC_REG_CPLL_CONFIG1); 443 if (reg & CPLL_CFG1_CPU_AUX1) 444 return xtal_rate; 445 446 if (reg & CPLL_CFG1_CPU_AUX0) 447 return MHZ(480); 448 449 return cpu_pll_rate; 450 } 451 452 static __init unsigned long 453 mt7620_get_cpu_rate(unsigned long pll_rate) 454 { 455 u32 reg; 456 u32 mul; 457 u32 div; 458 459 reg = rt_sysc_r32(SYSC_REG_CPU_SYS_CLKCFG); 460 461 mul = reg & CPU_SYS_CLKCFG_CPU_FFRAC_MASK; 462 div = (reg >> CPU_SYS_CLKCFG_CPU_FDIV_SHIFT) & 463 CPU_SYS_CLKCFG_CPU_FDIV_MASK; 464 465 return mt7620_calc_rate(pll_rate, mul, div); 466 } 467 468 static const u32 mt7620_ocp_dividers[16] __initconst = { 469 [CPU_SYS_CLKCFG_OCP_RATIO_2] = 2, 470 [CPU_SYS_CLKCFG_OCP_RATIO_3] = 3, 471 [CPU_SYS_CLKCFG_OCP_RATIO_4] = 4, 472 [CPU_SYS_CLKCFG_OCP_RATIO_5] = 5, 473 [CPU_SYS_CLKCFG_OCP_RATIO_10] = 10, 474 }; 475 476 static __init unsigned long 477 mt7620_get_dram_rate(unsigned long pll_rate) 478 { 479 if (dram_type == SYSCFG0_DRAM_TYPE_SDRAM) 480 return pll_rate / 4; 481 482 return pll_rate / 3; 483 } 484 485 static __init unsigned long 486 mt7620_get_sys_rate(unsigned long cpu_rate) 487 { 488 u32 reg; 489 u32 ocp_ratio; 490 u32 div; 491 492 reg = rt_sysc_r32(SYSC_REG_CPU_SYS_CLKCFG); 493 494 ocp_ratio = (reg >> CPU_SYS_CLKCFG_OCP_RATIO_SHIFT) & 495 CPU_SYS_CLKCFG_OCP_RATIO_MASK; 496 497 if (WARN_ON(ocp_ratio >= ARRAY_SIZE(mt7620_ocp_dividers))) 498 return cpu_rate; 499 500 div = mt7620_ocp_dividers[ocp_ratio]; 501 if (WARN(!div, "invalid divider for OCP ratio %u", ocp_ratio)) 502 return cpu_rate; 503 504 return cpu_rate / div; 505 } 506 507 void __init ralink_clk_init(void) 508 { 509 unsigned long xtal_rate; 510 unsigned long cpu_pll_rate; 511 unsigned long pll_rate; 512 unsigned long cpu_rate; 513 unsigned long sys_rate; 514 unsigned long dram_rate; 515 unsigned long periph_rate; 516 unsigned long pcmi2s_rate; 517 518 xtal_rate = mt7620_get_xtal_rate(); 519 520 #define RFMT(label) label ":%lu.%03luMHz " 521 #define RINT(x) ((x) / 1000000) 522 #define RFRAC(x) (((x) / 1000) % 1000) 523 524 if (is_mt76x8()) { 525 if (xtal_rate == MHZ(40)) 526 cpu_rate = MHZ(580); 527 else 528 cpu_rate = MHZ(575); 529 dram_rate = sys_rate = cpu_rate / 3; 530 periph_rate = MHZ(40); 531 pcmi2s_rate = MHZ(480); 532 533 ralink_clk_add("10000d00.uartlite", periph_rate); 534 ralink_clk_add("10000e00.uartlite", periph_rate); 535 } else { 536 cpu_pll_rate = mt7620_get_cpu_pll_rate(xtal_rate); 537 pll_rate = mt7620_get_pll_rate(xtal_rate, cpu_pll_rate); 538 539 cpu_rate = mt7620_get_cpu_rate(pll_rate); 540 dram_rate = mt7620_get_dram_rate(pll_rate); 541 sys_rate = mt7620_get_sys_rate(cpu_rate); 542 periph_rate = mt7620_get_periph_rate(xtal_rate); 543 pcmi2s_rate = periph_rate; 544 545 pr_debug(RFMT("XTAL") RFMT("CPU_PLL") RFMT("PLL"), 546 RINT(xtal_rate), RFRAC(xtal_rate), 547 RINT(cpu_pll_rate), RFRAC(cpu_pll_rate), 548 RINT(pll_rate), RFRAC(pll_rate)); 549 550 ralink_clk_add("10000500.uart", periph_rate); 551 } 552 553 pr_debug(RFMT("CPU") RFMT("DRAM") RFMT("SYS") RFMT("PERIPH"), 554 RINT(cpu_rate), RFRAC(cpu_rate), 555 RINT(dram_rate), RFRAC(dram_rate), 556 RINT(sys_rate), RFRAC(sys_rate), 557 RINT(periph_rate), RFRAC(periph_rate)); 558 #undef RFRAC 559 #undef RINT 560 #undef RFMT 561 562 ralink_clk_add("cpu", cpu_rate); 563 ralink_clk_add("10000100.timer", periph_rate); 564 ralink_clk_add("10000120.watchdog", periph_rate); 565 ralink_clk_add("10000900.i2c", periph_rate); 566 ralink_clk_add("10000a00.i2s", pcmi2s_rate); 567 ralink_clk_add("10000b00.spi", sys_rate); 568 ralink_clk_add("10000b40.spi", sys_rate); 569 ralink_clk_add("10000c00.uartlite", periph_rate); 570 ralink_clk_add("10000d00.uart1", periph_rate); 571 ralink_clk_add("10000e00.uart2", periph_rate); 572 ralink_clk_add("10180000.wmac", xtal_rate); 573 574 if (IS_ENABLED(CONFIG_USB) && !is_mt76x8()) { 575 /* 576 * When the CPU goes into sleep mode, the BUS clock will be 577 * too low for USB to function properly. Adjust the busses 578 * fractional divider to fix this 579 */ 580 u32 val = rt_sysc_r32(SYSC_REG_CPU_SYS_CLKCFG); 581 582 val &= ~(CLKCFG_FDIV_MASK | CLKCFG_FFRAC_MASK); 583 val |= CLKCFG_FDIV_USB_VAL | CLKCFG_FFRAC_USB_VAL; 584 585 rt_sysc_w32(val, SYSC_REG_CPU_SYS_CLKCFG); 586 } 587 } 588 589 void __init ralink_of_remap(void) 590 { 591 rt_sysc_membase = plat_of_remap_node("ralink,mt7620a-sysc"); 592 rt_memc_membase = plat_of_remap_node("ralink,mt7620a-memc"); 593 594 if (!rt_sysc_membase || !rt_memc_membase) 595 panic("Failed to remap core resources"); 596 } 597 598 static __init void 599 mt7620_dram_init(struct ralink_soc_info *soc_info) 600 { 601 switch (dram_type) { 602 case SYSCFG0_DRAM_TYPE_SDRAM: 603 pr_info("Board has SDRAM\n"); 604 soc_info->mem_size_min = MT7620_SDRAM_SIZE_MIN; 605 soc_info->mem_size_max = MT7620_SDRAM_SIZE_MAX; 606 break; 607 608 case SYSCFG0_DRAM_TYPE_DDR1: 609 pr_info("Board has DDR1\n"); 610 soc_info->mem_size_min = MT7620_DDR1_SIZE_MIN; 611 soc_info->mem_size_max = MT7620_DDR1_SIZE_MAX; 612 break; 613 614 case SYSCFG0_DRAM_TYPE_DDR2: 615 pr_info("Board has DDR2\n"); 616 soc_info->mem_size_min = MT7620_DDR2_SIZE_MIN; 617 soc_info->mem_size_max = MT7620_DDR2_SIZE_MAX; 618 break; 619 default: 620 BUG(); 621 } 622 } 623 624 static __init void 625 mt7628_dram_init(struct ralink_soc_info *soc_info) 626 { 627 switch (dram_type) { 628 case SYSCFG0_DRAM_TYPE_DDR1_MT7628: 629 pr_info("Board has DDR1\n"); 630 soc_info->mem_size_min = MT7620_DDR1_SIZE_MIN; 631 soc_info->mem_size_max = MT7620_DDR1_SIZE_MAX; 632 break; 633 634 case SYSCFG0_DRAM_TYPE_DDR2_MT7628: 635 pr_info("Board has DDR2\n"); 636 soc_info->mem_size_min = MT7620_DDR2_SIZE_MIN; 637 soc_info->mem_size_max = MT7620_DDR2_SIZE_MAX; 638 break; 639 default: 640 BUG(); 641 } 642 } 643 644 void prom_soc_init(struct ralink_soc_info *soc_info) 645 { 646 void __iomem *sysc = (void __iomem *) KSEG1ADDR(MT7620_SYSC_BASE); 647 unsigned char *name = NULL; 648 u32 n0; 649 u32 n1; 650 u32 rev; 651 u32 cfg0; 652 u32 pmu0; 653 u32 pmu1; 654 u32 bga; 655 656 n0 = __raw_readl(sysc + SYSC_REG_CHIP_NAME0); 657 n1 = __raw_readl(sysc + SYSC_REG_CHIP_NAME1); 658 rev = __raw_readl(sysc + SYSC_REG_CHIP_REV); 659 bga = (rev >> CHIP_REV_PKG_SHIFT) & CHIP_REV_PKG_MASK; 660 661 if (n0 == MT7620_CHIP_NAME0 && n1 == MT7620_CHIP_NAME1) { 662 if (bga) { 663 ralink_soc = MT762X_SOC_MT7620A; 664 name = "MT7620A"; 665 soc_info->compatible = "ralink,mt7620a-soc"; 666 } else { 667 ralink_soc = MT762X_SOC_MT7620N; 668 name = "MT7620N"; 669 soc_info->compatible = "ralink,mt7620n-soc"; 670 } 671 } else if (n0 == MT7620_CHIP_NAME0 && n1 == MT7628_CHIP_NAME1) { 672 u32 efuse = __raw_readl(sysc + SYSC_REG_EFUSE_CFG); 673 674 if (efuse & EFUSE_MT7688) { 675 ralink_soc = MT762X_SOC_MT7688; 676 name = "MT7688"; 677 } else { 678 ralink_soc = MT762X_SOC_MT7628AN; 679 name = "MT7628AN"; 680 } 681 soc_info->compatible = "ralink,mt7628an-soc"; 682 } else { 683 panic("mt762x: unknown SoC, n0:%08x n1:%08x\n", n0, n1); 684 } 685 686 snprintf(soc_info->sys_type, RAMIPS_SYS_TYPE_LEN, 687 "MediaTek %s ver:%u eco:%u", 688 name, 689 (rev >> CHIP_REV_VER_SHIFT) & CHIP_REV_VER_MASK, 690 (rev & CHIP_REV_ECO_MASK)); 691 692 cfg0 = __raw_readl(sysc + SYSC_REG_SYSTEM_CONFIG0); 693 if (is_mt76x8()) { 694 dram_type = cfg0 & DRAM_TYPE_MT7628_MASK; 695 } else { 696 dram_type = (cfg0 >> SYSCFG0_DRAM_TYPE_SHIFT) & 697 SYSCFG0_DRAM_TYPE_MASK; 698 if (dram_type == SYSCFG0_DRAM_TYPE_UNKNOWN) 699 dram_type = SYSCFG0_DRAM_TYPE_SDRAM; 700 } 701 702 soc_info->mem_base = MT7620_DRAM_BASE; 703 if (is_mt76x8()) 704 mt7628_dram_init(soc_info); 705 else 706 mt7620_dram_init(soc_info); 707 708 pmu0 = __raw_readl(sysc + PMU0_CFG); 709 pmu1 = __raw_readl(sysc + PMU1_CFG); 710 711 pr_info("Analog PMU set to %s control\n", 712 (pmu0 & PMU_SW_SET) ? ("sw") : ("hw")); 713 pr_info("Digital PMU set to %s control\n", 714 (pmu1 & DIG_SW_SEL) ? ("sw") : ("hw")); 715 716 if (is_mt76x8()) 717 rt2880_pinmux_data = mt7628an_pinmux_data; 718 else 719 rt2880_pinmux_data = mt7620a_pinmux_data; 720 } 721