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_platform.h> 24 #include <linux/of_device.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/prom.h> 33 #include <asm/udbg.h> 34 #include <sysdev/fsl_soc.h> 35 #include <sysdev/fsl_pci.h> 36 #include <soc/fsl/qe/qe.h> 37 38 #include "mpc83xx.h" 39 40 #define SVR_REV(svr) (((svr) >> 0) & 0xFFFF) /* Revision field */ 41 42 static void quirk_mpc8360e_qe_enet10(void) 43 { 44 /* 45 * handle mpc8360E Erratum QE_ENET10: 46 * RGMII AC values do not meet the specification 47 */ 48 uint svid = mfspr(SPRN_SVR); 49 struct device_node *np_par; 50 struct resource res; 51 void __iomem *base; 52 int ret; 53 54 np_par = of_find_node_by_name(NULL, "par_io"); 55 if (np_par == NULL) { 56 pr_warn("%s couldn't find par_io node\n", __func__); 57 return; 58 } 59 /* Map Parallel I/O ports registers */ 60 ret = of_address_to_resource(np_par, 0, &res); 61 if (ret) { 62 pr_warn("%s couldn't map par_io registers\n", __func__); 63 goto out; 64 } 65 66 base = ioremap(res.start, resource_size(&res)); 67 if (!base) 68 goto out; 69 70 /* 71 * set output delay adjustments to default values according 72 * table 5 in Errata Rev. 5, 9/2011: 73 * 74 * write 0b01 to UCC1 bits 18:19 75 * write 0b01 to UCC2 option 1 bits 4:5 76 * write 0b01 to UCC2 option 2 bits 16:17 77 */ 78 clrsetbits_be32((base + 0xa8), 0x0c00f000, 0x04005000); 79 80 /* 81 * set output delay adjustments to default values according 82 * table 3-13 in Reference Manual Rev.3 05/2010: 83 * 84 * write 0b01 to UCC2 option 2 bits 16:17 85 * write 0b0101 to UCC1 bits 20:23 86 * write 0b0101 to UCC2 option 1 bits 24:27 87 */ 88 clrsetbits_be32((base + 0xac), 0x0000cff0, 0x00004550); 89 90 if (SVR_REV(svid) == 0x0021) { 91 /* 92 * UCC2 option 1: write 0b1010 to bits 24:27 93 * at address IMMRBAR+0x14AC 94 */ 95 clrsetbits_be32((base + 0xac), 0x000000f0, 0x000000a0); 96 } else if (SVR_REV(svid) == 0x0020) { 97 /* 98 * UCC1: write 0b11 to bits 18:19 99 * at address IMMRBAR+0x14A8 100 */ 101 setbits32((base + 0xa8), 0x00003000); 102 103 /* 104 * UCC2 option 1: write 0b11 to bits 4:5 105 * at address IMMRBAR+0x14A8 106 */ 107 setbits32((base + 0xa8), 0x0c000000); 108 109 /* 110 * UCC2 option 2: write 0b11 to bits 16:17 111 * at address IMMRBAR+0x14AC 112 */ 113 setbits32((base + 0xac), 0x0000c000); 114 } 115 iounmap(base); 116 out: 117 of_node_put(np_par); 118 } 119 120 /* ************************************************************************ 121 * 122 * Setup the architecture 123 * 124 */ 125 static void __init mpc83xx_km_setup_arch(void) 126 { 127 #ifdef CONFIG_QUICC_ENGINE 128 struct device_node *np; 129 #endif 130 131 mpc83xx_setup_arch(); 132 133 #ifdef CONFIG_QUICC_ENGINE 134 np = of_find_node_by_name(NULL, "par_io"); 135 if (np != NULL) { 136 par_io_init(np); 137 of_node_put(np); 138 139 for_each_node_by_name(np, "spi") 140 par_io_of_config(np); 141 142 for_each_node_by_name(np, "ucc") 143 par_io_of_config(np); 144 145 /* Only apply this quirk when par_io is available */ 146 np = of_find_compatible_node(NULL, "network", "ucc_geth"); 147 if (np != NULL) { 148 quirk_mpc8360e_qe_enet10(); 149 of_node_put(np); 150 } 151 } 152 #endif /* CONFIG_QUICC_ENGINE */ 153 } 154 155 machine_device_initcall(mpc83xx_km, mpc83xx_declare_of_platform_devices); 156 157 /* list of the supported boards */ 158 static char *board[] __initdata = { 159 "Keymile,KMETER1", 160 "Keymile,kmpbec8321", 161 NULL 162 }; 163 164 /* 165 * Called very early, MMU is off, device-tree isn't unflattened 166 */ 167 static int __init mpc83xx_km_probe(void) 168 { 169 int i = 0; 170 171 while (board[i]) { 172 if (of_machine_is_compatible(board[i])) 173 break; 174 i++; 175 } 176 return (board[i] != NULL); 177 } 178 179 define_machine(mpc83xx_km) { 180 .name = "mpc83xx-km-platform", 181 .probe = mpc83xx_km_probe, 182 .setup_arch = mpc83xx_km_setup_arch, 183 .init_IRQ = mpc83xx_ipic_init_IRQ, 184 .get_irq = ipic_get_irq, 185 .restart = mpc83xx_restart, 186 .time_init = mpc83xx_time_init, 187 .calibrate_decr = generic_calibrate_decr, 188 .progress = udbg_progress, 189 }; 190