1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright 2013 Freescale Semiconductor, Inc.
7 #include <clock_legacy.h>
11 #include <asm/cache.h>
13 #include <asm/arch/imx-regs.h>
14 #include <asm/arch/clock.h>
15 #include <asm/arch/crm_regs.h>
16 #include <asm/mach-imx/sys_proto.h>
19 #ifdef CONFIG_FSL_ESDHC_IMX
20 #include <fsl_esdhc_imx.h>
23 #ifdef CONFIG_FSL_ESDHC_IMX
24 DECLARE_GLOBAL_DATA_PTR;
27 static char soc_type[] = "xx0";
29 #ifdef CONFIG_MXC_OCOTP
30 void enable_ocotp_clk(unsigned char enable)
32 struct ccm_reg *ccm = (struct ccm_reg *)CCM_BASE_ADDR;
35 reg = readl(&ccm->ccgr6);
37 reg |= CCM_CCGR6_OCOTP_CTRL_MASK;
39 reg &= ~CCM_CCGR6_OCOTP_CTRL_MASK;
40 writel(reg, &ccm->ccgr6);
44 static u32 get_mcu_main_clk(void)
46 struct ccm_reg *ccm = (struct ccm_reg *)CCM_BASE_ADDR;
47 u32 ccm_ccsr, ccm_cacrr, armclk_div;
48 u32 sysclk_sel, pll_pfd_sel = 0;
51 ccm_ccsr = readl(&ccm->ccsr);
52 sysclk_sel = ccm_ccsr & CCM_CCSR_SYS_CLK_SEL_MASK;
53 sysclk_sel >>= CCM_CCSR_SYS_CLK_SEL_OFFSET;
55 ccm_cacrr = readl(&ccm->cacrr);
56 armclk_div = ccm_cacrr & CCM_CACRR_ARM_CLK_DIV_MASK;
57 armclk_div >>= CCM_CACRR_ARM_CLK_DIV_OFFSET;
68 pll_pfd_sel = ccm_ccsr & CCM_CCSR_PLL2_PFD_CLK_SEL_MASK;
69 pll_pfd_sel >>= CCM_CCSR_PLL2_PFD_CLK_SEL_OFFSET;
71 freq = PLL2_MAIN_FREQ;
72 else if (pll_pfd_sel == 1)
73 freq = PLL2_PFD1_FREQ;
74 else if (pll_pfd_sel == 2)
75 freq = PLL2_PFD2_FREQ;
76 else if (pll_pfd_sel == 3)
77 freq = PLL2_PFD3_FREQ;
78 else if (pll_pfd_sel == 4)
79 freq = PLL2_PFD4_FREQ;
82 freq = PLL2_MAIN_FREQ;
85 pll_pfd_sel = ccm_ccsr & CCM_CCSR_PLL1_PFD_CLK_SEL_MASK;
86 pll_pfd_sel >>= CCM_CCSR_PLL1_PFD_CLK_SEL_OFFSET;
88 freq = PLL1_MAIN_FREQ;
89 else if (pll_pfd_sel == 1)
90 freq = PLL1_PFD1_FREQ;
91 else if (pll_pfd_sel == 2)
92 freq = PLL1_PFD2_FREQ;
93 else if (pll_pfd_sel == 3)
94 freq = PLL1_PFD3_FREQ;
95 else if (pll_pfd_sel == 4)
96 freq = PLL1_PFD4_FREQ;
99 freq = PLL3_MAIN_FREQ;
102 printf("unsupported system clock select\n");
105 return freq / armclk_div;
108 static u32 get_bus_clk(void)
110 struct ccm_reg *ccm = (struct ccm_reg *)CCM_BASE_ADDR;
111 u32 ccm_cacrr, busclk_div;
113 ccm_cacrr = readl(&ccm->cacrr);
115 busclk_div = ccm_cacrr & CCM_CACRR_BUS_CLK_DIV_MASK;
116 busclk_div >>= CCM_CACRR_BUS_CLK_DIV_OFFSET;
119 return get_mcu_main_clk() / busclk_div;
122 static u32 get_ipg_clk(void)
124 struct ccm_reg *ccm = (struct ccm_reg *)CCM_BASE_ADDR;
125 u32 ccm_cacrr, ipgclk_div;
127 ccm_cacrr = readl(&ccm->cacrr);
129 ipgclk_div = ccm_cacrr & CCM_CACRR_IPG_CLK_DIV_MASK;
130 ipgclk_div >>= CCM_CACRR_IPG_CLK_DIV_OFFSET;
133 return get_bus_clk() / ipgclk_div;
136 static u32 get_uart_clk(void)
138 return get_ipg_clk();
141 static u32 get_sdhc_clk(void)
143 struct ccm_reg *ccm = (struct ccm_reg *)CCM_BASE_ADDR;
144 u32 ccm_cscmr1, ccm_cscdr2, sdhc_clk_sel, sdhc_clk_div;
147 ccm_cscmr1 = readl(&ccm->cscmr1);
148 sdhc_clk_sel = ccm_cscmr1 & CCM_CSCMR1_ESDHC1_CLK_SEL_MASK;
149 sdhc_clk_sel >>= CCM_CSCMR1_ESDHC1_CLK_SEL_OFFSET;
151 ccm_cscdr2 = readl(&ccm->cscdr2);
152 sdhc_clk_div = ccm_cscdr2 & CCM_CSCDR2_ESDHC1_CLK_DIV_MASK;
153 sdhc_clk_div >>= CCM_CSCDR2_ESDHC1_CLK_DIV_OFFSET;
156 switch (sdhc_clk_sel) {
158 freq = PLL3_MAIN_FREQ;
161 freq = PLL3_PFD3_FREQ;
164 freq = PLL1_PFD3_FREQ;
167 freq = get_bus_clk();
171 return freq / sdhc_clk_div;
174 u32 get_fec_clk(void)
176 struct ccm_reg *ccm = (struct ccm_reg *)CCM_BASE_ADDR;
177 u32 ccm_cscmr2, rmii_clk_sel;
180 ccm_cscmr2 = readl(&ccm->cscmr2);
181 rmii_clk_sel = ccm_cscmr2 & CCM_CSCMR2_RMII_CLK_SEL_MASK;
182 rmii_clk_sel >>= CCM_CSCMR2_RMII_CLK_SEL_OFFSET;
184 switch (rmii_clk_sel) {
186 freq = ENET_EXTERNAL_CLK;
189 freq = AUDIO_EXTERNAL_CLK;
192 freq = PLL5_MAIN_FREQ;
195 freq = PLL5_MAIN_FREQ / 2;
202 static u32 get_i2c_clk(void)
204 return get_ipg_clk();
207 static u32 get_dspi_clk(void)
209 return get_ipg_clk();
212 u32 get_lpuart_clk(void)
214 return get_uart_clk();
217 unsigned int mxc_get_clock(enum mxc_clock clk)
221 return get_mcu_main_clk();
223 return get_bus_clk();
225 return get_ipg_clk();
227 return get_uart_clk();
229 return get_sdhc_clk();
231 return get_fec_clk();
233 return get_i2c_clk();
235 return get_dspi_clk();
242 /* Dump some core clocks */
243 int do_vf610_showclocks(cmd_tbl_t *cmdtp, int flag, int argc,
247 printf("cpu clock : %8d MHz\n", mxc_get_clock(MXC_ARM_CLK) / 1000000);
248 printf("bus clock : %8d MHz\n", mxc_get_clock(MXC_BUS_CLK) / 1000000);
249 printf("ipg clock : %8d MHz\n", mxc_get_clock(MXC_IPG_CLK) / 1000000);
255 clocks, CONFIG_SYS_MAXARGS, 1, do_vf610_showclocks,
260 #ifdef CONFIG_FEC_MXC
261 __weak void imx_get_mac_from_fuse(int dev_id, unsigned char *mac)
263 struct ocotp_regs *ocotp = (struct ocotp_regs *)OCOTP_BASE_ADDR;
264 struct fuse_bank *bank = &ocotp->bank[4];
265 struct fuse_bank4_regs *fuse =
266 (struct fuse_bank4_regs *)bank->fuse_regs;
268 u32 value = readl(&fuse->mac_addr0);
269 mac[0] = (value >> 8);
272 value = readl(&fuse->mac_addr1);
273 mac[2] = value >> 24;
274 mac[3] = value >> 16;
280 u32 get_cpu_rev(void)
282 return MXC_CPU_VF610 << 12;
285 #if defined(CONFIG_DISPLAY_CPUINFO)
286 static char *get_reset_cause(void)
289 struct src *src_regs = (struct src *)SRC_BASE_ADDR;
291 cause = readl(&src_regs->srsr);
292 writel(cause, &src_regs->srsr);
294 if (cause & SRC_SRSR_POR_RST)
295 return "POWER ON RESET";
296 else if (cause & SRC_SRSR_WDOG_A5)
298 else if (cause & SRC_SRSR_WDOG_M4)
300 else if (cause & SRC_SRSR_JTAG_RST)
301 return "JTAG HIGH-Z";
302 else if (cause & SRC_SRSR_SW_RST)
304 else if (cause & SRC_SRSR_RESETB)
305 return "EXTERNAL RESET";
307 return "unknown reset";
310 int print_cpuinfo(void)
312 printf("CPU: Freescale Vybrid VF%s at %d MHz\n",
313 soc_type, mxc_get_clock(MXC_ARM_CLK) / 1000000);
314 printf("Reset cause: %s\n", get_reset_cause());
320 int arch_cpu_init(void)
322 struct mscm *mscm = (struct mscm *)MSCM_BASE_ADDR;
324 soc_type[0] = mscm->cpxcount ? '6' : '5'; /*Dual Core => VF6x0 */
325 soc_type[1] = mscm->cpxcfg1 ? '1' : '0'; /* L2 Cache => VFx10 */
330 #ifdef CONFIG_ARCH_MISC_INIT
331 int arch_misc_init(void)
336 strcat(soc, soc_type);
343 int cpu_eth_init(bd_t *bis)
347 #if defined(CONFIG_FEC_MXC)
348 rc = fecmxc_initialize(bis);
354 #ifdef CONFIG_FSL_ESDHC_IMX
355 int cpu_mmc_init(bd_t *bis)
357 return fsl_esdhc_mmc_init(bis);
363 #ifdef CONFIG_FSL_ESDHC_IMX
364 gd->arch.sdhc_clk = mxc_get_clock(MXC_ESDHC_CLK);
369 #if !CONFIG_IS_ENABLED(SYS_DCACHE_OFF)
370 void enable_caches(void)
372 #if defined(CONFIG_SYS_ARM_CACHE_WRITETHROUGH)
373 enum dcache_option option = DCACHE_WRITETHROUGH;
375 enum dcache_option option = DCACHE_WRITEBACK;
380 /* Enable caching on OCRAM */
381 mmu_set_region_dcache_behaviour(IRAM_BASE_ADDR, IRAM_SIZE, option);
385 #ifdef CONFIG_SYS_I2C_MXC
386 /* i2c_num can be from 0 - 3 */
387 int enable_i2c_clk(unsigned char enable, unsigned int i2c_num)
389 struct ccm_reg *ccm = (struct ccm_reg *)CCM_BASE_ADDR;
393 clrsetbits_le32(&ccm->ccgr4, CCM_CCGR4_I2C0_CTRL_MASK,
394 CCM_CCGR4_I2C0_CTRL_MASK);
396 clrsetbits_le32(&ccm->ccgr10, CCM_CCGR10_I2C2_CTRL_MASK,
397 CCM_CCGR10_I2C2_CTRL_MASK);