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arm: socfpga: Make the pinmux table const u8
[karo-tx-uboot.git] / arch / arm / mach-socfpga / system_manager.c
1 /*
2  * Copyright (C) 2013 Altera Corporation <www.altera.com>
3  *
4  * SPDX-License-Identifier:     GPL-2.0+
5  */
6
7 #include <common.h>
8 #include <asm/io.h>
9 #include <asm/arch/system_manager.h>
10 #include <asm/arch/fpga_manager.h>
11
12 DECLARE_GLOBAL_DATA_PTR;
13
14 static struct socfpga_system_manager *sysmgr_regs =
15         (struct socfpga_system_manager *)SOCFPGA_SYSMGR_ADDRESS;
16
17 /*
18  * Populate the value for SYSMGR.FPGAINTF.MODULE based on pinmux setting.
19  * The value is not wrote to SYSMGR.FPGAINTF.MODULE but
20  * CONFIG_SYSMGR_ISWGRP_HANDOFF.
21  */
22 static void populate_sysmgr_fpgaintf_module(void)
23 {
24         uint32_t handoff_val = 0;
25
26         /* ISWGRP_HANDOFF_FPGAINTF */
27         writel(0, &sysmgr_regs->iswgrp_handoff[2]);
28
29         /* Enable the signal for those HPS peripherals that use FPGA. */
30         if (readl(&sysmgr_regs->nandusefpga) == SYSMGR_FPGAINTF_USEFPGA)
31                 handoff_val |= SYSMGR_FPGAINTF_NAND;
32         if (readl(&sysmgr_regs->rgmii1usefpga) == SYSMGR_FPGAINTF_USEFPGA)
33                 handoff_val |= SYSMGR_FPGAINTF_EMAC1;
34         if (readl(&sysmgr_regs->sdmmcusefpga) == SYSMGR_FPGAINTF_USEFPGA)
35                 handoff_val |= SYSMGR_FPGAINTF_SDMMC;
36         if (readl(&sysmgr_regs->rgmii0usefpga) == SYSMGR_FPGAINTF_USEFPGA)
37                 handoff_val |= SYSMGR_FPGAINTF_EMAC0;
38         if (readl(&sysmgr_regs->spim0usefpga) == SYSMGR_FPGAINTF_USEFPGA)
39                 handoff_val |= SYSMGR_FPGAINTF_SPIM0;
40         if (readl(&sysmgr_regs->spim1usefpga) == SYSMGR_FPGAINTF_USEFPGA)
41                 handoff_val |= SYSMGR_FPGAINTF_SPIM1;
42
43         /* populate (not writing) the value for SYSMGR.FPGAINTF.MODULE
44         based on pinmux setting */
45         setbits_le32(&sysmgr_regs->iswgrp_handoff[2], handoff_val);
46
47         handoff_val = readl(&sysmgr_regs->iswgrp_handoff[2]);
48         if (fpgamgr_test_fpga_ready()) {
49                 /* Enable the required signals only */
50                 writel(handoff_val, &sysmgr_regs->fpgaintfgrp_module);
51         }
52 }
53
54 /*
55  * Configure all the pin muxes
56  */
57 void sysmgr_pinmux_init(void)
58 {
59         uint32_t regs = (uint32_t)&sysmgr_regs->emacio[0];
60         const u8 *sys_mgr_init_table;
61         unsigned int len;
62         int i;
63
64         sysmgr_get_pinmux_table(&sys_mgr_init_table, &len);
65
66         for (i = 0; i < len; i++) {
67                 writel(sys_mgr_init_table[i], regs);
68                 regs += sizeof(regs);
69         }
70
71         populate_sysmgr_fpgaintf_module();
72 }
73
74 /*
75  * This bit allows the bootrom to configure the IOs after a warm reset.
76  */
77 void sysmgr_config_warmrstcfgio(int enable)
78 {
79         if (enable)
80                 setbits_le32(&sysmgr_regs->romcodegrp_ctrl,
81                              SYSMGR_ROMCODEGRP_CTRL_WARMRSTCFGIO);
82         else
83                 clrbits_le32(&sysmgr_regs->romcodegrp_ctrl,
84                              SYSMGR_ROMCODEGRP_CTRL_WARMRSTCFGIO);
85 }