1 /* 2 * Copyright 2008-2011 DENX Software Engineering GmbH 3 * Author: Heiko Schocher <hs@denx.de> 4 * 5 * Description: 6 * Keymile 83xx platform specific routines. 7 * 8 * This program is free software; you can redistribute it and/or modify it 9 * under the terms of the GNU General Public License as published by the 10 * Free Software Foundation; either version 2 of the License, or (at your 11 * option) any later version. 12 */ 13 14 #include <linux/stddef.h> 15 #include <linux/kernel.h> 16 #include <linux/init.h> 17 #include <linux/errno.h> 18 #include <linux/reboot.h> 19 #include <linux/pci.h> 20 #include <linux/kdev_t.h> 21 #include <linux/major.h> 22 #include <linux/console.h> 23 #include <linux/delay.h> 24 #include <linux/seq_file.h> 25 #include <linux/root_dev.h> 26 #include <linux/initrd.h> 27 #include <linux/of_platform.h> 28 #include <linux/of_device.h> 29 30 #include <linux/atomic.h> 31 #include <linux/time.h> 32 #include <linux/io.h> 33 #include <asm/machdep.h> 34 #include <asm/ipic.h> 35 #include <asm/irq.h> 36 #include <asm/prom.h> 37 #include <asm/udbg.h> 38 #include <sysdev/fsl_soc.h> 39 #include <sysdev/fsl_pci.h> 40 #include <soc/fsl/qe/qe.h> 41 #include <soc/fsl/qe/qe_ic.h> 42 43 #include "mpc83xx.h" 44 45 #define SVR_REV(svr) (((svr) >> 0) & 0xFFFF) /* Revision field */ 46 47 static void quirk_mpc8360e_qe_enet10(void) 48 { 49 /* 50 * handle mpc8360E Erratum QE_ENET10: 51 * RGMII AC values do not meet the specification 52 */ 53 uint svid = mfspr(SPRN_SVR); 54 struct device_node *np_par; 55 struct resource res; 56 void __iomem *base; 57 int ret; 58 59 np_par = of_find_node_by_name(NULL, "par_io"); 60 if (np_par == NULL) { 61 pr_warn("%s couldn;t find par_io node\n", __func__); 62 return; 63 } 64 /* Map Parallel I/O ports registers */ 65 ret = of_address_to_resource(np_par, 0, &res); 66 if (ret) { 67 pr_warn("%s couldn;t map par_io registers\n", __func__); 68 return; 69 } 70 71 base = ioremap(res.start, res.end - res.start + 1); 72 73 /* 74 * set output delay adjustments to default values according 75 * table 5 in Errata Rev. 5, 9/2011: 76 * 77 * write 0b01 to UCC1 bits 18:19 78 * write 0b01 to UCC2 option 1 bits 4:5 79 * write 0b01 to UCC2 option 2 bits 16:17 80 */ 81 clrsetbits_be32((base + 0xa8), 0x0c00f000, 0x04005000); 82 83 /* 84 * set output delay adjustments to default values according 85 * table 3-13 in Reference Manual Rev.3 05/2010: 86 * 87 * write 0b01 to UCC2 option 2 bits 16:17 88 * write 0b0101 to UCC1 bits 20:23 89 * write 0b0101 to UCC2 option 1 bits 24:27 90 */ 91 clrsetbits_be32((base + 0xac), 0x0000cff0, 0x00004550); 92 93 if (SVR_REV(svid) == 0x0021) { 94 /* 95 * UCC2 option 1: write 0b1010 to bits 24:27 96 * at address IMMRBAR+0x14AC 97 */ 98 clrsetbits_be32((base + 0xac), 0x000000f0, 0x000000a0); 99 } else if (SVR_REV(svid) == 0x0020) { 100 /* 101 * UCC1: write 0b11 to bits 18:19 102 * at address IMMRBAR+0x14A8 103 */ 104 setbits32((base + 0xa8), 0x00003000); 105 106 /* 107 * UCC2 option 1: write 0b11 to bits 4:5 108 * at address IMMRBAR+0x14A8 109 */ 110 setbits32((base + 0xa8), 0x0c000000); 111 112 /* 113 * UCC2 option 2: write 0b11 to bits 16:17 114 * at address IMMRBAR+0x14AC 115 */ 116 setbits32((base + 0xac), 0x0000c000); 117 } 118 iounmap(base); 119 of_node_put(np_par); 120 } 121 122 /* ************************************************************************ 123 * 124 * Setup the architecture 125 * 126 */ 127 static void __init mpc83xx_km_setup_arch(void) 128 { 129 #ifdef CONFIG_QUICC_ENGINE 130 struct device_node *np; 131 #endif 132 133 mpc83xx_setup_arch(); 134 135 #ifdef CONFIG_QUICC_ENGINE 136 np = of_find_node_by_name(NULL, "par_io"); 137 if (np != NULL) { 138 par_io_init(np); 139 of_node_put(np); 140 141 for_each_node_by_name(np, "spi") 142 par_io_of_config(np); 143 144 for_each_node_by_name(np, "ucc") 145 par_io_of_config(np); 146 147 /* Only apply this quirk when par_io is available */ 148 np = of_find_compatible_node(NULL, "network", "ucc_geth"); 149 if (np != NULL) { 150 quirk_mpc8360e_qe_enet10(); 151 of_node_put(np); 152 } 153 } 154 #endif /* CONFIG_QUICC_ENGINE */ 155 } 156 157 machine_device_initcall(mpc83xx_km, mpc83xx_declare_of_platform_devices); 158 159 /* list of the supported boards */ 160 static char *board[] __initdata = { 161 "Keymile,KMETER1", 162 "Keymile,kmpbec8321", 163 NULL 164 }; 165 166 /* 167 * Called very early, MMU is off, device-tree isn't unflattened 168 */ 169 static int __init mpc83xx_km_probe(void) 170 { 171 int i = 0; 172 173 while (board[i]) { 174 if (of_machine_is_compatible(board[i])) 175 break; 176 i++; 177 } 178 return (board[i] != NULL); 179 } 180 181 define_machine(mpc83xx_km) { 182 .name = "mpc83xx-km-platform", 183 .probe = mpc83xx_km_probe, 184 .setup_arch = mpc83xx_km_setup_arch, 185 .init_IRQ = mpc83xx_ipic_and_qe_init_IRQ, 186 .get_irq = ipic_get_irq, 187 .restart = mpc83xx_restart, 188 .time_init = mpc83xx_time_init, 189 .calibrate_decr = generic_calibrate_decr, 190 .progress = udbg_progress, 191 }; 192