1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright 2008-2011 DENX Software Engineering GmbH 4 * Author: Heiko Schocher <hs@denx.de> 5 * 6 * Description: 7 * Keymile 83xx platform specific routines. 8 */ 9 10 #include <linux/stddef.h> 11 #include <linux/kernel.h> 12 #include <linux/init.h> 13 #include <linux/errno.h> 14 #include <linux/reboot.h> 15 #include <linux/pci.h> 16 #include <linux/kdev_t.h> 17 #include <linux/major.h> 18 #include <linux/console.h> 19 #include <linux/delay.h> 20 #include <linux/seq_file.h> 21 #include <linux/root_dev.h> 22 #include <linux/initrd.h> 23 #include <linux/of.h> 24 #include <linux/of_address.h> 25 26 #include <linux/atomic.h> 27 #include <linux/time.h> 28 #include <linux/io.h> 29 #include <asm/machdep.h> 30 #include <asm/ipic.h> 31 #include <asm/irq.h> 32 #include <asm/udbg.h> 33 #include <sysdev/fsl_soc.h> 34 #include <sysdev/fsl_pci.h> 35 #include <soc/fsl/qe/qe.h> 36 37 #include "mpc83xx.h" 38 39 #define SVR_REV(svr) (((svr) >> 0) & 0xFFFF) /* Revision field */ 40 quirk_mpc8360e_qe_enet10(void)41 static void __init quirk_mpc8360e_qe_enet10(void) 42 { 43 /* 44 * handle mpc8360E Erratum QE_ENET10: 45 * RGMII AC values do not meet the specification 46 */ 47 uint svid = mfspr(SPRN_SVR); 48 struct device_node *np_par; 49 struct resource res; 50 void __iomem *base; 51 int ret; 52 53 np_par = of_find_node_by_name(NULL, "par_io"); 54 if (np_par == NULL) { 55 pr_warn("%s couldn't find par_io node\n", __func__); 56 return; 57 } 58 /* Map Parallel I/O ports registers */ 59 ret = of_address_to_resource(np_par, 0, &res); 60 if (ret) { 61 pr_warn("%s couldn't map par_io registers\n", __func__); 62 goto out; 63 } 64 65 base = ioremap(res.start, resource_size(&res)); 66 if (!base) 67 goto out; 68 69 /* 70 * set output delay adjustments to default values according 71 * table 5 in Errata Rev. 5, 9/2011: 72 * 73 * write 0b01 to UCC1 bits 18:19 74 * write 0b01 to UCC2 option 1 bits 4:5 75 * write 0b01 to UCC2 option 2 bits 16:17 76 */ 77 clrsetbits_be32((base + 0xa8), 0x0c00f000, 0x04005000); 78 79 /* 80 * set output delay adjustments to default values according 81 * table 3-13 in Reference Manual Rev.3 05/2010: 82 * 83 * write 0b01 to UCC2 option 2 bits 16:17 84 * write 0b0101 to UCC1 bits 20:23 85 * write 0b0101 to UCC2 option 1 bits 24:27 86 */ 87 clrsetbits_be32((base + 0xac), 0x0000cff0, 0x00004550); 88 89 if (SVR_REV(svid) == 0x0021) { 90 /* 91 * UCC2 option 1: write 0b1010 to bits 24:27 92 * at address IMMRBAR+0x14AC 93 */ 94 clrsetbits_be32((base + 0xac), 0x000000f0, 0x000000a0); 95 } else if (SVR_REV(svid) == 0x0020) { 96 /* 97 * UCC1: write 0b11 to bits 18:19 98 * at address IMMRBAR+0x14A8 99 */ 100 setbits32((base + 0xa8), 0x00003000); 101 102 /* 103 * UCC2 option 1: write 0b11 to bits 4:5 104 * at address IMMRBAR+0x14A8 105 */ 106 setbits32((base + 0xa8), 0x0c000000); 107 108 /* 109 * UCC2 option 2: write 0b11 to bits 16:17 110 * at address IMMRBAR+0x14AC 111 */ 112 setbits32((base + 0xac), 0x0000c000); 113 } 114 iounmap(base); 115 out: 116 of_node_put(np_par); 117 } 118 119 /* ************************************************************************ 120 * 121 * Setup the architecture 122 * 123 */ mpc83xx_km_setup_arch(void)124 static void __init mpc83xx_km_setup_arch(void) 125 { 126 #ifdef CONFIG_QUICC_ENGINE 127 struct device_node *np; 128 #endif 129 130 mpc83xx_setup_arch(); 131 132 #ifdef CONFIG_QUICC_ENGINE 133 np = of_find_node_by_name(NULL, "par_io"); 134 if (np != NULL) { 135 par_io_init(np); 136 of_node_put(np); 137 138 for_each_node_by_name(np, "spi") 139 par_io_of_config(np); 140 141 for_each_node_by_name(np, "ucc") 142 par_io_of_config(np); 143 144 /* Only apply this quirk when par_io is available */ 145 np = of_find_compatible_node(NULL, "network", "ucc_geth"); 146 if (np != NULL) { 147 quirk_mpc8360e_qe_enet10(); 148 of_node_put(np); 149 } 150 } 151 #endif /* CONFIG_QUICC_ENGINE */ 152 } 153 154 machine_device_initcall(mpc83xx_km, mpc83xx_declare_of_platform_devices); 155 156 /* list of the supported boards */ 157 static char *board[] __initdata = { 158 "Keymile,KMETER1", 159 "Keymile,kmpbec8321", 160 NULL 161 }; 162 163 /* 164 * Called very early, MMU is off, device-tree isn't unflattened 165 */ mpc83xx_km_probe(void)166 static int __init mpc83xx_km_probe(void) 167 { 168 int i = 0; 169 170 while (board[i]) { 171 if (of_machine_is_compatible(board[i])) 172 break; 173 i++; 174 } 175 return (board[i] != NULL); 176 } 177 define_machine(mpc83xx_km)178 define_machine(mpc83xx_km) { 179 .name = "mpc83xx-km-platform", 180 .probe = mpc83xx_km_probe, 181 .setup_arch = mpc83xx_km_setup_arch, 182 .discover_phbs = mpc83xx_setup_pci, 183 .init_IRQ = mpc83xx_ipic_init_IRQ, 184 .get_irq = ipic_get_irq, 185 .restart = mpc83xx_restart, 186 .time_init = mpc83xx_time_init, 187 .progress = udbg_progress, 188 }; 189