1 /* 2 * Copyright 2013 Freescale Semiconductor, Inc. 3 * 4 * SPDX-License-Identifier: GPL-2.0+ 5 */ 6 7 #include <common.h> 8 #include <asm/io.h> 9 #include <asm/arch/imx-regs.h> 10 #include <asm/arch/clock.h> 11 #include <asm/arch/crm_regs.h> 12 #include <netdev.h> 13 #ifdef CONFIG_FSL_ESDHC 14 #include <fsl_esdhc.h> 15 #endif 16 17 #ifdef CONFIG_FSL_ESDHC 18 DECLARE_GLOBAL_DATA_PTR; 19 #endif 20 21 static char soc_type[] = "xx0"; 22 23 #ifdef CONFIG_MXC_OCOTP 24 void enable_ocotp_clk(unsigned char enable) 25 { 26 struct ccm_reg *ccm = (struct ccm_reg *)CCM_BASE_ADDR; 27 u32 reg; 28 29 reg = readl(&ccm->ccgr6); 30 if (enable) 31 reg |= CCM_CCGR6_OCOTP_CTRL_MASK; 32 else 33 reg &= ~CCM_CCGR6_OCOTP_CTRL_MASK; 34 writel(reg, &ccm->ccgr6); 35 } 36 #endif 37 38 static u32 get_mcu_main_clk(void) 39 { 40 struct ccm_reg *ccm = (struct ccm_reg *)CCM_BASE_ADDR; 41 u32 ccm_ccsr, ccm_cacrr, armclk_div; 42 u32 sysclk_sel, pll_pfd_sel = 0; 43 u32 freq = 0; 44 45 ccm_ccsr = readl(&ccm->ccsr); 46 sysclk_sel = ccm_ccsr & CCM_CCSR_SYS_CLK_SEL_MASK; 47 sysclk_sel >>= CCM_CCSR_SYS_CLK_SEL_OFFSET; 48 49 ccm_cacrr = readl(&ccm->cacrr); 50 armclk_div = ccm_cacrr & CCM_CACRR_ARM_CLK_DIV_MASK; 51 armclk_div >>= CCM_CACRR_ARM_CLK_DIV_OFFSET; 52 armclk_div += 1; 53 54 switch (sysclk_sel) { 55 case 0: 56 freq = FASE_CLK_FREQ; 57 break; 58 case 1: 59 freq = SLOW_CLK_FREQ; 60 break; 61 case 2: 62 pll_pfd_sel = ccm_ccsr & CCM_CCSR_PLL2_PFD_CLK_SEL_MASK; 63 pll_pfd_sel >>= CCM_CCSR_PLL2_PFD_CLK_SEL_OFFSET; 64 if (pll_pfd_sel == 0) 65 freq = PLL2_MAIN_FREQ; 66 else if (pll_pfd_sel == 1) 67 freq = PLL2_PFD1_FREQ; 68 else if (pll_pfd_sel == 2) 69 freq = PLL2_PFD2_FREQ; 70 else if (pll_pfd_sel == 3) 71 freq = PLL2_PFD3_FREQ; 72 else if (pll_pfd_sel == 4) 73 freq = PLL2_PFD4_FREQ; 74 break; 75 case 3: 76 freq = PLL2_MAIN_FREQ; 77 break; 78 case 4: 79 pll_pfd_sel = ccm_ccsr & CCM_CCSR_PLL1_PFD_CLK_SEL_MASK; 80 pll_pfd_sel >>= CCM_CCSR_PLL1_PFD_CLK_SEL_OFFSET; 81 if (pll_pfd_sel == 0) 82 freq = PLL1_MAIN_FREQ; 83 else if (pll_pfd_sel == 1) 84 freq = PLL1_PFD1_FREQ; 85 else if (pll_pfd_sel == 2) 86 freq = PLL1_PFD2_FREQ; 87 else if (pll_pfd_sel == 3) 88 freq = PLL1_PFD3_FREQ; 89 else if (pll_pfd_sel == 4) 90 freq = PLL1_PFD4_FREQ; 91 break; 92 case 5: 93 freq = PLL3_MAIN_FREQ; 94 break; 95 default: 96 printf("unsupported system clock select\n"); 97 } 98 99 return freq / armclk_div; 100 } 101 102 static u32 get_bus_clk(void) 103 { 104 struct ccm_reg *ccm = (struct ccm_reg *)CCM_BASE_ADDR; 105 u32 ccm_cacrr, busclk_div; 106 107 ccm_cacrr = readl(&ccm->cacrr); 108 109 busclk_div = ccm_cacrr & CCM_CACRR_BUS_CLK_DIV_MASK; 110 busclk_div >>= CCM_CACRR_BUS_CLK_DIV_OFFSET; 111 busclk_div += 1; 112 113 return get_mcu_main_clk() / busclk_div; 114 } 115 116 static u32 get_ipg_clk(void) 117 { 118 struct ccm_reg *ccm = (struct ccm_reg *)CCM_BASE_ADDR; 119 u32 ccm_cacrr, ipgclk_div; 120 121 ccm_cacrr = readl(&ccm->cacrr); 122 123 ipgclk_div = ccm_cacrr & CCM_CACRR_IPG_CLK_DIV_MASK; 124 ipgclk_div >>= CCM_CACRR_IPG_CLK_DIV_OFFSET; 125 ipgclk_div += 1; 126 127 return get_bus_clk() / ipgclk_div; 128 } 129 130 static u32 get_uart_clk(void) 131 { 132 return get_ipg_clk(); 133 } 134 135 static u32 get_sdhc_clk(void) 136 { 137 struct ccm_reg *ccm = (struct ccm_reg *)CCM_BASE_ADDR; 138 u32 ccm_cscmr1, ccm_cscdr2, sdhc_clk_sel, sdhc_clk_div; 139 u32 freq = 0; 140 141 ccm_cscmr1 = readl(&ccm->cscmr1); 142 sdhc_clk_sel = ccm_cscmr1 & CCM_CSCMR1_ESDHC1_CLK_SEL_MASK; 143 sdhc_clk_sel >>= CCM_CSCMR1_ESDHC1_CLK_SEL_OFFSET; 144 145 ccm_cscdr2 = readl(&ccm->cscdr2); 146 sdhc_clk_div = ccm_cscdr2 & CCM_CSCDR2_ESDHC1_CLK_DIV_MASK; 147 sdhc_clk_div >>= CCM_CSCDR2_ESDHC1_CLK_DIV_OFFSET; 148 sdhc_clk_div += 1; 149 150 switch (sdhc_clk_sel) { 151 case 0: 152 freq = PLL3_MAIN_FREQ; 153 break; 154 case 1: 155 freq = PLL3_PFD3_FREQ; 156 break; 157 case 2: 158 freq = PLL1_PFD3_FREQ; 159 break; 160 case 3: 161 freq = get_bus_clk(); 162 break; 163 } 164 165 return freq / sdhc_clk_div; 166 } 167 168 u32 get_fec_clk(void) 169 { 170 struct ccm_reg *ccm = (struct ccm_reg *)CCM_BASE_ADDR; 171 u32 ccm_cscmr2, rmii_clk_sel; 172 u32 freq = 0; 173 174 ccm_cscmr2 = readl(&ccm->cscmr2); 175 rmii_clk_sel = ccm_cscmr2 & CCM_CSCMR2_RMII_CLK_SEL_MASK; 176 rmii_clk_sel >>= CCM_CSCMR2_RMII_CLK_SEL_OFFSET; 177 178 switch (rmii_clk_sel) { 179 case 0: 180 freq = ENET_EXTERNAL_CLK; 181 break; 182 case 1: 183 freq = AUDIO_EXTERNAL_CLK; 184 break; 185 case 2: 186 freq = PLL5_MAIN_FREQ; 187 break; 188 case 3: 189 freq = PLL5_MAIN_FREQ / 2; 190 break; 191 } 192 193 return freq; 194 } 195 196 static u32 get_i2c_clk(void) 197 { 198 return get_ipg_clk(); 199 } 200 201 unsigned int mxc_get_clock(enum mxc_clock clk) 202 { 203 switch (clk) { 204 case MXC_ARM_CLK: 205 return get_mcu_main_clk(); 206 case MXC_BUS_CLK: 207 return get_bus_clk(); 208 case MXC_IPG_CLK: 209 return get_ipg_clk(); 210 case MXC_UART_CLK: 211 return get_uart_clk(); 212 case MXC_ESDHC_CLK: 213 return get_sdhc_clk(); 214 case MXC_FEC_CLK: 215 return get_fec_clk(); 216 case MXC_I2C_CLK: 217 return get_i2c_clk(); 218 default: 219 break; 220 } 221 return -1; 222 } 223 224 /* Dump some core clocks */ 225 int do_vf610_showclocks(cmd_tbl_t *cmdtp, int flag, int argc, 226 char * const argv[]) 227 { 228 printf("\n"); 229 printf("cpu clock : %8d MHz\n", mxc_get_clock(MXC_ARM_CLK) / 1000000); 230 printf("bus clock : %8d MHz\n", mxc_get_clock(MXC_BUS_CLK) / 1000000); 231 printf("ipg clock : %8d MHz\n", mxc_get_clock(MXC_IPG_CLK) / 1000000); 232 233 return 0; 234 } 235 236 U_BOOT_CMD( 237 clocks, CONFIG_SYS_MAXARGS, 1, do_vf610_showclocks, 238 "display clocks", 239 "" 240 ); 241 242 #ifdef CONFIG_FEC_MXC 243 void imx_get_mac_from_fuse(int dev_id, unsigned char *mac) 244 { 245 struct ocotp_regs *ocotp = (struct ocotp_regs *)OCOTP_BASE_ADDR; 246 struct fuse_bank *bank = &ocotp->bank[4]; 247 struct fuse_bank4_regs *fuse = 248 (struct fuse_bank4_regs *)bank->fuse_regs; 249 250 u32 value = readl(&fuse->mac_addr0); 251 mac[0] = (value >> 8); 252 mac[1] = value; 253 254 value = readl(&fuse->mac_addr1); 255 mac[2] = value >> 24; 256 mac[3] = value >> 16; 257 mac[4] = value >> 8; 258 mac[5] = value; 259 } 260 #endif 261 262 #if defined(CONFIG_DISPLAY_CPUINFO) 263 static char *get_reset_cause(void) 264 { 265 u32 cause; 266 struct src *src_regs = (struct src *)SRC_BASE_ADDR; 267 268 cause = readl(&src_regs->srsr); 269 writel(cause, &src_regs->srsr); 270 271 if (cause & SRC_SRSR_POR_RST) 272 return "POWER ON RESET"; 273 else if (cause & SRC_SRSR_WDOG_A5) 274 return "WDOG A5"; 275 else if (cause & SRC_SRSR_WDOG_M4) 276 return "WDOG M4"; 277 else if (cause & SRC_SRSR_JTAG_RST) 278 return "JTAG HIGH-Z"; 279 else if (cause & SRC_SRSR_SW_RST) 280 return "SW RESET"; 281 else if (cause & SRC_SRSR_RESETB) 282 return "EXTERNAL RESET"; 283 else 284 return "unknown reset"; 285 } 286 287 int print_cpuinfo(void) 288 { 289 printf("CPU: Freescale Vybrid VF%s at %d MHz\n", 290 soc_type, mxc_get_clock(MXC_ARM_CLK) / 1000000); 291 printf("Reset cause: %s\n", get_reset_cause()); 292 293 return 0; 294 } 295 #endif 296 297 int arch_cpu_init(void) 298 { 299 struct mscm *mscm = (struct mscm *)MSCM_BASE_ADDR; 300 301 soc_type[0] = mscm->cpxcount ? '6' : '5'; /*Dual Core => VF6x0 */ 302 soc_type[1] = mscm->cpxcfg1 ? '1' : '0'; /* L2 Cache => VFx10 */ 303 304 return 0; 305 } 306 307 #ifdef CONFIG_ARCH_MISC_INIT 308 int arch_misc_init(void) 309 { 310 char soc[6]; 311 312 strcat(soc, "vf"); 313 strcat(soc, soc_type); 314 setenv("soc", soc); 315 316 return 0; 317 } 318 #endif 319 320 int cpu_eth_init(bd_t *bis) 321 { 322 int rc = -ENODEV; 323 324 #if defined(CONFIG_FEC_MXC) 325 rc = fecmxc_initialize(bis); 326 #endif 327 328 return rc; 329 } 330 331 #ifdef CONFIG_FSL_ESDHC 332 int cpu_mmc_init(bd_t *bis) 333 { 334 return fsl_esdhc_mmc_init(bis); 335 } 336 #endif 337 338 int get_clocks(void) 339 { 340 #ifdef CONFIG_FSL_ESDHC 341 gd->arch.sdhc_clk = mxc_get_clock(MXC_ESDHC_CLK); 342 #endif 343 return 0; 344 } 345 346 #ifndef CONFIG_SYS_DCACHE_OFF 347 void enable_caches(void) 348 { 349 #if defined(CONFIG_SYS_ARM_CACHE_WRITETHROUGH) 350 enum dcache_option option = DCACHE_WRITETHROUGH; 351 #else 352 enum dcache_option option = DCACHE_WRITEBACK; 353 #endif 354 dcache_enable(); 355 icache_enable(); 356 357 /* Enable caching on OCRAM */ 358 mmu_set_region_dcache_behaviour(IRAM_BASE_ADDR, IRAM_SIZE, option); 359 } 360 #endif 361