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/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