1 /*
2  *  Copyright (C) 2013-2017 Altera Corporation <www.altera.com>
3  *
4  * SPDX-License-Identifier:	GPL-2.0+
5  */
6 
7 #include <common.h>
8 #include <wait_bit.h>
9 #include <asm/io.h>
10 #include <asm/arch/clock_manager.h>
11 
12 DECLARE_GLOBAL_DATA_PTR;
13 
14 static const struct socfpga_clock_manager *clock_manager_base =
15 	(struct socfpga_clock_manager *)SOCFPGA_CLKMGR_ADDRESS;
16 
17 void cm_wait_for_lock(u32 mask)
18 {
19 	u32 inter_val;
20 	u32 retry = 0;
21 	do {
22 #if defined(CONFIG_TARGET_SOCFPGA_GEN5)
23 		inter_val = readl(&clock_manager_base->inter) & mask;
24 #elif defined(CONFIG_TARGET_SOCFPGA_ARRIA10)
25 		inter_val = readl(&clock_manager_base->stat) & mask;
26 #endif
27 		/* Wait for stable lock */
28 		if (inter_val == mask)
29 			retry++;
30 		else
31 			retry = 0;
32 		if (retry >= 10)
33 			break;
34 	} while (1);
35 }
36 
37 /* function to poll in the fsm busy bit */
38 int cm_wait_for_fsm(void)
39 {
40 	return wait_for_bit_le32(&clock_manager_base->stat,
41 				 CLKMGR_STAT_BUSY, false, 20000, false);
42 }
43 
44 int set_cpu_clk_info(void)
45 {
46 	/* Calculate the clock frequencies required for drivers */
47 	cm_get_l4_sp_clk_hz();
48 	cm_get_mmc_controller_clk_hz();
49 
50 	gd->bd->bi_arm_freq = cm_get_mpu_clk_hz() / 1000000;
51 	gd->bd->bi_dsp_freq = 0;
52 
53 #if defined(CONFIG_TARGET_SOCFPGA_GEN5)
54 	gd->bd->bi_ddr_freq = cm_get_sdram_clk_hz() / 1000000;
55 #elif defined(CONFIG_TARGET_SOCFPGA_ARRIA10)
56 	gd->bd->bi_ddr_freq = 0;
57 #endif
58 
59 	return 0;
60 }
61 
62 int do_showclocks(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
63 {
64 	cm_print_clock_quick_summary();
65 	return 0;
66 }
67 
68 U_BOOT_CMD(
69 	clocks,	CONFIG_SYS_MAXARGS, 1, do_showclocks,
70 	"display clocks",
71 	""
72 );
73