1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Old U-boot compatibility for Esteem 195E Hotfoot CPU Board 4 * 5 * Author: Solomon Peachy <solomon@linux-wlan.com> 6 */ 7 8 #include "ops.h" 9 #include "stdio.h" 10 #include "reg.h" 11 #include "dcr.h" 12 #include "4xx.h" 13 #include "cuboot.h" 14 15 #define TARGET_4xx 16 #define TARGET_HOTFOOT 17 18 #include "ppcboot-hotfoot.h" 19 20 static bd_t bd; 21 22 #define NUM_REGS 3 23 24 static void hotfoot_fixups(void) 25 { 26 u32 uart = mfdcr(DCRN_CPC0_UCR) & 0x7f; 27 28 dt_fixup_memory(bd.bi_memstart, bd.bi_memsize); 29 30 dt_fixup_cpu_clocks(bd.bi_procfreq, bd.bi_procfreq, 0); 31 dt_fixup_clock("/plb", bd.bi_plb_busfreq); 32 dt_fixup_clock("/plb/opb", bd.bi_opbfreq); 33 dt_fixup_clock("/plb/ebc", bd.bi_pci_busfreq); 34 dt_fixup_clock("/plb/opb/serial@ef600300", bd.bi_procfreq / uart); 35 dt_fixup_clock("/plb/opb/serial@ef600400", bd.bi_procfreq / uart); 36 37 dt_fixup_mac_address_by_alias("ethernet0", bd.bi_enetaddr); 38 dt_fixup_mac_address_by_alias("ethernet1", bd.bi_enet1addr); 39 40 /* Is this a single eth/serial board? */ 41 if ((bd.bi_enet1addr[0] == 0) && 42 (bd.bi_enet1addr[1] == 0) && 43 (bd.bi_enet1addr[2] == 0) && 44 (bd.bi_enet1addr[3] == 0) && 45 (bd.bi_enet1addr[4] == 0) && 46 (bd.bi_enet1addr[5] == 0)) { 47 void *devp; 48 49 printf("Trimming devtree for single serial/eth board\n"); 50 51 devp = finddevice("/plb/opb/serial@ef600300"); 52 if (!devp) 53 fatal("Can't find node for /plb/opb/serial@ef600300"); 54 del_node(devp); 55 56 devp = finddevice("/plb/opb/ethernet@ef600900"); 57 if (!devp) 58 fatal("Can't find node for /plb/opb/ethernet@ef600900"); 59 del_node(devp); 60 } 61 62 ibm4xx_quiesce_eth((u32 *)0xef600800, (u32 *)0xef600900); 63 64 /* Fix up flash size in fdt for 4M boards. */ 65 if (bd.bi_flashsize < 0x800000) { 66 u32 regs[NUM_REGS]; 67 void *devp = finddevice("/plb/ebc/nor_flash@0"); 68 if (!devp) 69 fatal("Can't find FDT node for nor_flash!??"); 70 71 printf("Fixing devtree for 4M Flash\n"); 72 73 /* First fix up the base address */ 74 getprop(devp, "reg", regs, sizeof(regs)); 75 regs[0] = 0; 76 regs[1] = 0xffc00000; 77 regs[2] = 0x00400000; 78 setprop(devp, "reg", regs, sizeof(regs)); 79 80 /* Then the offsets */ 81 devp = finddevice("/plb/ebc/nor_flash@0/partition@0"); 82 if (!devp) 83 fatal("Can't find FDT node for partition@0"); 84 getprop(devp, "reg", regs, 2*sizeof(u32)); 85 regs[0] -= 0x400000; 86 setprop(devp, "reg", regs, 2*sizeof(u32)); 87 88 devp = finddevice("/plb/ebc/nor_flash@0/partition@1"); 89 if (!devp) 90 fatal("Can't find FDT node for partition@1"); 91 getprop(devp, "reg", regs, 2*sizeof(u32)); 92 regs[0] -= 0x400000; 93 setprop(devp, "reg", regs, 2*sizeof(u32)); 94 95 devp = finddevice("/plb/ebc/nor_flash@0/partition@2"); 96 if (!devp) 97 fatal("Can't find FDT node for partition@2"); 98 getprop(devp, "reg", regs, 2*sizeof(u32)); 99 regs[0] -= 0x400000; 100 setprop(devp, "reg", regs, 2*sizeof(u32)); 101 102 devp = finddevice("/plb/ebc/nor_flash@0/partition@3"); 103 if (!devp) 104 fatal("Can't find FDT node for partition@3"); 105 getprop(devp, "reg", regs, 2*sizeof(u32)); 106 regs[0] -= 0x400000; 107 setprop(devp, "reg", regs, 2*sizeof(u32)); 108 109 devp = finddevice("/plb/ebc/nor_flash@0/partition@4"); 110 if (!devp) 111 fatal("Can't find FDT node for partition@4"); 112 getprop(devp, "reg", regs, 2*sizeof(u32)); 113 regs[0] -= 0x400000; 114 setprop(devp, "reg", regs, 2*sizeof(u32)); 115 116 devp = finddevice("/plb/ebc/nor_flash@0/partition@6"); 117 if (!devp) 118 fatal("Can't find FDT node for partition@6"); 119 getprop(devp, "reg", regs, 2*sizeof(u32)); 120 regs[0] -= 0x400000; 121 setprop(devp, "reg", regs, 2*sizeof(u32)); 122 123 /* Delete the FeatFS node */ 124 devp = finddevice("/plb/ebc/nor_flash@0/partition@5"); 125 if (!devp) 126 fatal("Can't find FDT node for partition@5"); 127 del_node(devp); 128 } 129 } 130 131 void platform_init(unsigned long r3, unsigned long r4, unsigned long r5, 132 unsigned long r6, unsigned long r7) 133 { 134 CUBOOT_INIT(); 135 platform_ops.fixups = hotfoot_fixups; 136 platform_ops.exit = ibm40x_dbcr_reset; 137 fdt_init(_dtb_start); 138 serial_console_init(); 139 } 140