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

  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 <asm/qe.h>
 41 #include <asm/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         if (ppc_md.progress)
134                 ppc_md.progress("kmpbec83xx_setup_arch()", 0);
135 
136         mpc83xx_setup_pci();
137 
138 #ifdef CONFIG_QUICC_ENGINE
139         qe_reset();
140 
141         np = of_find_node_by_name(NULL, "par_io");
142         if (np != NULL) {
143                 par_io_init(np);
144                 of_node_put(np);
145 
146                 for_each_node_by_name(np, "spi")
147                         par_io_of_config(np);
148 
149                 for_each_node_by_name(np, "ucc")
150                         par_io_of_config(np);
151 
152                 /* Only apply this quirk when par_io is available */
153                 np = of_find_compatible_node(NULL, "network", "ucc_geth");
154                 if (np != NULL) {
155                         quirk_mpc8360e_qe_enet10();
156                         of_node_put(np);
157                 }
158         }
159 #endif  /* CONFIG_QUICC_ENGINE */
160 }
161 
162 machine_device_initcall(mpc83xx_km, mpc83xx_declare_of_platform_devices);
163 
164 /* list of the supported boards */
165 static char *board[] __initdata = {
166         "Keymile,KMETER1",
167         "Keymile,kmpbec8321",
168         NULL
169 };
170 
171 /*
172  * Called very early, MMU is off, device-tree isn't unflattened
173  */
174 static int __init mpc83xx_km_probe(void)
175 {
176         unsigned long node = of_get_flat_dt_root();
177         int i = 0;
178 
179         while (board[i]) {
180                 if (of_flat_dt_is_compatible(node, board[i]))
181                         break;
182                 i++;
183         }
184         return (board[i] != NULL);
185 }
186 
187 define_machine(mpc83xx_km) {
188         .name           = "mpc83xx-km-platform",
189         .probe          = mpc83xx_km_probe,
190         .setup_arch     = mpc83xx_km_setup_arch,
191         .init_IRQ       = mpc83xx_ipic_and_qe_init_IRQ,
192         .get_irq        = ipic_get_irq,
193         .restart        = mpc83xx_restart,
194         .time_init      = mpc83xx_time_init,
195         .calibrate_decr = generic_calibrate_decr,
196         .progress       = udbg_progress,
197 };
198 

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