arch/powerpc/platforms/83xx/km83xx.c

   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 };