2 * Copyright 2013 Freescale Semiconductor, Inc.
4 * SPDX-License-Identifier: GPL-2.0+
9 #include <asm/arch/imx-regs.h>
10 #include <asm/arch/clock.h>
11 #include <asm/arch/crm_regs.h>
12 #include <asm/imx-common/sys_proto.h>
14 #ifdef CONFIG_FSL_ESDHC
15 #include <fsl_esdhc.h>
18 #ifdef CONFIG_FSL_ESDHC
19 DECLARE_GLOBAL_DATA_PTR;
22 static char soc_type[] = "xx0";
24 #ifdef CONFIG_MXC_OCOTP
25 void enable_ocotp_clk(unsigned char enable)
27 struct ccm_reg *ccm = (struct ccm_reg *)CCM_BASE_ADDR;
30 reg = readl(&ccm->ccgr6);
32 reg |= CCM_CCGR6_OCOTP_CTRL_MASK;
34 reg &= ~CCM_CCGR6_OCOTP_CTRL_MASK;
35 writel(reg, &ccm->ccgr6);
39 static u32 get_mcu_main_clk(void)
41 struct ccm_reg *ccm = (struct ccm_reg *)CCM_BASE_ADDR;
42 u32 ccm_ccsr, ccm_cacrr, armclk_div;
43 u32 sysclk_sel, pll_pfd_sel = 0;
46 ccm_ccsr = readl(&ccm->ccsr);
47 sysclk_sel = ccm_ccsr & CCM_CCSR_SYS_CLK_SEL_MASK;
48 sysclk_sel >>= CCM_CCSR_SYS_CLK_SEL_OFFSET;
50 ccm_cacrr = readl(&ccm->cacrr);
51 armclk_div = ccm_cacrr & CCM_CACRR_ARM_CLK_DIV_MASK;
52 armclk_div >>= CCM_CACRR_ARM_CLK_DIV_OFFSET;
63 pll_pfd_sel = ccm_ccsr & CCM_CCSR_PLL2_PFD_CLK_SEL_MASK;
64 pll_pfd_sel >>= CCM_CCSR_PLL2_PFD_CLK_SEL_OFFSET;
66 freq = PLL2_MAIN_FREQ;
67 else if (pll_pfd_sel == 1)
68 freq = PLL2_PFD1_FREQ;
69 else if (pll_pfd_sel == 2)
70 freq = PLL2_PFD2_FREQ;
71 else if (pll_pfd_sel == 3)
72 freq = PLL2_PFD3_FREQ;
73 else if (pll_pfd_sel == 4)
74 freq = PLL2_PFD4_FREQ;
77 freq = PLL2_MAIN_FREQ;
80 pll_pfd_sel = ccm_ccsr & CCM_CCSR_PLL1_PFD_CLK_SEL_MASK;
81 pll_pfd_sel >>= CCM_CCSR_PLL1_PFD_CLK_SEL_OFFSET;
83 freq = PLL1_MAIN_FREQ;
84 else if (pll_pfd_sel == 1)
85 freq = PLL1_PFD1_FREQ;
86 else if (pll_pfd_sel == 2)
87 freq = PLL1_PFD2_FREQ;
88 else if (pll_pfd_sel == 3)
89 freq = PLL1_PFD3_FREQ;
90 else if (pll_pfd_sel == 4)
91 freq = PLL1_PFD4_FREQ;
94 freq = PLL3_MAIN_FREQ;
97 printf("unsupported system clock select\n");
100 return freq / armclk_div;
103 static u32 get_bus_clk(void)
105 struct ccm_reg *ccm = (struct ccm_reg *)CCM_BASE_ADDR;
106 u32 ccm_cacrr, busclk_div;
108 ccm_cacrr = readl(&ccm->cacrr);
110 busclk_div = ccm_cacrr & CCM_CACRR_BUS_CLK_DIV_MASK;
111 busclk_div >>= CCM_CACRR_BUS_CLK_DIV_OFFSET;
114 return get_mcu_main_clk() / busclk_div;
117 static u32 get_ipg_clk(void)
119 struct ccm_reg *ccm = (struct ccm_reg *)CCM_BASE_ADDR;
120 u32 ccm_cacrr, ipgclk_div;
122 ccm_cacrr = readl(&ccm->cacrr);
124 ipgclk_div = ccm_cacrr & CCM_CACRR_IPG_CLK_DIV_MASK;
125 ipgclk_div >>= CCM_CACRR_IPG_CLK_DIV_OFFSET;
128 return get_bus_clk() / ipgclk_div;
131 static u32 get_uart_clk(void)
133 return get_ipg_clk();
136 static u32 get_sdhc_clk(void)
138 struct ccm_reg *ccm = (struct ccm_reg *)CCM_BASE_ADDR;
139 u32 ccm_cscmr1, ccm_cscdr2, sdhc_clk_sel, sdhc_clk_div;
142 ccm_cscmr1 = readl(&ccm->cscmr1);
143 sdhc_clk_sel = ccm_cscmr1 & CCM_CSCMR1_ESDHC1_CLK_SEL_MASK;
144 sdhc_clk_sel >>= CCM_CSCMR1_ESDHC1_CLK_SEL_OFFSET;
146 ccm_cscdr2 = readl(&ccm->cscdr2);
147 sdhc_clk_div = ccm_cscdr2 & CCM_CSCDR2_ESDHC1_CLK_DIV_MASK;
148 sdhc_clk_div >>= CCM_CSCDR2_ESDHC1_CLK_DIV_OFFSET;
151 switch (sdhc_clk_sel) {
153 freq = PLL3_MAIN_FREQ;
156 freq = PLL3_PFD3_FREQ;
159 freq = PLL1_PFD3_FREQ;
162 freq = get_bus_clk();
166 return freq / sdhc_clk_div;
169 u32 get_fec_clk(void)
171 struct ccm_reg *ccm = (struct ccm_reg *)CCM_BASE_ADDR;
172 u32 ccm_cscmr2, rmii_clk_sel;
175 ccm_cscmr2 = readl(&ccm->cscmr2);
176 rmii_clk_sel = ccm_cscmr2 & CCM_CSCMR2_RMII_CLK_SEL_MASK;
177 rmii_clk_sel >>= CCM_CSCMR2_RMII_CLK_SEL_OFFSET;
179 switch (rmii_clk_sel) {
181 freq = ENET_EXTERNAL_CLK;
184 freq = AUDIO_EXTERNAL_CLK;
187 freq = PLL5_MAIN_FREQ;
190 freq = PLL5_MAIN_FREQ / 2;
197 static u32 get_i2c_clk(void)
199 return get_ipg_clk();
202 static u32 get_dspi_clk(void)
204 return get_ipg_clk();
207 unsigned int mxc_get_clock(enum mxc_clock clk)
211 return get_mcu_main_clk();
213 return get_bus_clk();
215 return get_ipg_clk();
217 return get_uart_clk();
219 return get_sdhc_clk();
221 return get_fec_clk();
223 return get_i2c_clk();
225 return get_dspi_clk();
232 /* Dump some core clocks */
233 int do_vf610_showclocks(cmd_tbl_t *cmdtp, int flag, int argc,
237 printf("cpu clock : %8d MHz\n", mxc_get_clock(MXC_ARM_CLK) / 1000000);
238 printf("bus clock : %8d MHz\n", mxc_get_clock(MXC_BUS_CLK) / 1000000);
239 printf("ipg clock : %8d MHz\n", mxc_get_clock(MXC_IPG_CLK) / 1000000);
245 clocks, CONFIG_SYS_MAXARGS, 1, do_vf610_showclocks,
250 #ifdef CONFIG_FEC_MXC
251 void imx_get_mac_from_fuse(int dev_id, unsigned char *mac)
253 struct ocotp_regs *ocotp = (struct ocotp_regs *)OCOTP_BASE_ADDR;
254 struct fuse_bank *bank = &ocotp->bank[4];
255 struct fuse_bank4_regs *fuse =
256 (struct fuse_bank4_regs *)bank->fuse_regs;
258 u32 value = readl(&fuse->mac_addr0);
259 mac[0] = (value >> 8);
262 value = readl(&fuse->mac_addr1);
263 mac[2] = value >> 24;
264 mac[3] = value >> 16;
270 u32 get_cpu_rev(void)
272 return MXC_CPU_VF610 << 12;
275 #if defined(CONFIG_DISPLAY_CPUINFO)
276 static char *get_reset_cause(void)
279 struct src *src_regs = (struct src *)SRC_BASE_ADDR;
281 cause = readl(&src_regs->srsr);
282 writel(cause, &src_regs->srsr);
284 if (cause & SRC_SRSR_POR_RST)
285 return "POWER ON RESET";
286 else if (cause & SRC_SRSR_WDOG_A5)
288 else if (cause & SRC_SRSR_WDOG_M4)
290 else if (cause & SRC_SRSR_JTAG_RST)
291 return "JTAG HIGH-Z";
292 else if (cause & SRC_SRSR_SW_RST)
294 else if (cause & SRC_SRSR_RESETB)
295 return "EXTERNAL RESET";
297 return "unknown reset";
300 int print_cpuinfo(void)
302 printf("CPU: Freescale Vybrid VF%s at %d MHz\n",
303 soc_type, mxc_get_clock(MXC_ARM_CLK) / 1000000);
304 printf("Reset cause: %s\n", get_reset_cause());
310 int arch_cpu_init(void)
312 struct mscm *mscm = (struct mscm *)MSCM_BASE_ADDR;
314 soc_type[0] = mscm->cpxcount ? '6' : '5'; /*Dual Core => VF6x0 */
315 soc_type[1] = mscm->cpxcfg1 ? '1' : '0'; /* L2 Cache => VFx10 */
320 #ifdef CONFIG_ARCH_MISC_INIT
321 int arch_misc_init(void)
326 strcat(soc, soc_type);
333 int cpu_eth_init(bd_t *bis)
337 #if defined(CONFIG_FEC_MXC)
338 rc = fecmxc_initialize(bis);
344 #ifdef CONFIG_FSL_ESDHC
345 int cpu_mmc_init(bd_t *bis)
347 return fsl_esdhc_mmc_init(bis);
353 #ifdef CONFIG_FSL_ESDHC
354 gd->arch.sdhc_clk = mxc_get_clock(MXC_ESDHC_CLK);
359 #ifndef CONFIG_SYS_DCACHE_OFF
360 void enable_caches(void)
362 #if defined(CONFIG_SYS_ARM_CACHE_WRITETHROUGH)
363 enum dcache_option option = DCACHE_WRITETHROUGH;
365 enum dcache_option option = DCACHE_WRITEBACK;
370 /* Enable caching on OCRAM */
371 mmu_set_region_dcache_behaviour(IRAM_BASE_ADDR, IRAM_SIZE, option);