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
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 */
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 */
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
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
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