1 /*
2 * MPC86xx HPCN board specific routines
3 *
4 * Recode: ZHANG WEI <wei.zhang@freescale.com>
5 * Initial author: Xianghua Xiao <x.xiao@freescale.com>
6 *
7 * Copyright 2006 Freescale Semiconductor Inc.
8 *
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the
11 * Free Software Foundation; either version 2 of the License, or (at your
12 * option) any later version.
13 */
14
15 #include <linux/stddef.h>
16 #include <linux/kernel.h>
17 #include <linux/pci.h>
18 #include <linux/kdev_t.h>
19 #include <linux/delay.h>
20 #include <linux/seq_file.h>
21 #include <linux/of_platform.h>
22 #include <linux/memblock.h>
23
24 #include <asm/system.h>
25 #include <asm/time.h>
26 #include <asm/machdep.h>
27 #include <asm/pci-bridge.h>
28 #include <asm/prom.h>
29 #include <mm/mmu_decl.h>
30 #include <asm/udbg.h>
31 #include <asm/swiotlb.h>
32
33 #include <asm/mpic.h>
34
35 #include <sysdev/fsl_pci.h>
36 #include <sysdev/fsl_soc.h>
37
38 #include "mpc86xx.h"
39
40 #undef DEBUG
41
42 #ifdef DEBUG
43 #define DBG(fmt...) do { printk(KERN_ERR fmt); } while(0)
44 #else
45 #define DBG(fmt...) do { } while(0)
46 #endif
47
48 #ifdef CONFIG_PCI
49 extern int uli_exclude_device(struct pci_controller *hose,
50 u_char bus, u_char devfn);
51
mpc86xx_exclude_device(struct pci_controller * hose,u_char bus,u_char devfn)52 static int mpc86xx_exclude_device(struct pci_controller *hose,
53 u_char bus, u_char devfn)
54 {
55 struct device_node* node;
56 struct resource rsrc;
57
58 node = hose->dn;
59 of_address_to_resource(node, 0, &rsrc);
60
61 if ((rsrc.start & 0xfffff) == 0x8000) {
62 return uli_exclude_device(hose, bus, devfn);
63 }
64
65 return PCIBIOS_SUCCESSFUL;
66 }
67 #endif /* CONFIG_PCI */
68
69
70 static void __init
mpc86xx_hpcn_setup_arch(void)71 mpc86xx_hpcn_setup_arch(void)
72 {
73 #ifdef CONFIG_PCI
74 struct device_node *np;
75 struct pci_controller *hose;
76 #endif
77 dma_addr_t max = 0xffffffff;
78
79 if (ppc_md.progress)
80 ppc_md.progress("mpc86xx_hpcn_setup_arch()", 0);
81
82 #ifdef CONFIG_PCI
83 for_each_compatible_node(np, "pci", "fsl,mpc8641-pcie") {
84 struct resource rsrc;
85 of_address_to_resource(np, 0, &rsrc);
86 if ((rsrc.start & 0xfffff) == 0x8000)
87 fsl_add_bridge(np, 1);
88 else
89 fsl_add_bridge(np, 0);
90 hose = pci_find_hose_for_OF_device(np);
91 max = min(max, hose->dma_window_base_cur +
92 hose->dma_window_size);
93 }
94
95 ppc_md.pci_exclude_device = mpc86xx_exclude_device;
96
97 #endif
98
99 printk("MPC86xx HPCN board from Freescale Semiconductor\n");
100
101 #ifdef CONFIG_SMP
102 mpc86xx_smp_init();
103 #endif
104
105 #ifdef CONFIG_SWIOTLB
106 if (memblock_end_of_DRAM() > max) {
107 ppc_swiotlb_enable = 1;
108 set_pci_dma_ops(&swiotlb_dma_ops);
109 ppc_md.pci_dma_dev_setup = pci_dma_dev_setup_swiotlb;
110 }
111 #endif
112 }
113
114
115 static void
mpc86xx_hpcn_show_cpuinfo(struct seq_file * m)116 mpc86xx_hpcn_show_cpuinfo(struct seq_file *m)
117 {
118 uint svid = mfspr(SPRN_SVR);
119
120 seq_printf(m, "Vendor\t\t: Freescale Semiconductor\n");
121
122 seq_printf(m, "SVR\t\t: 0x%x\n", svid);
123 }
124
125
126 /*
127 * Called very early, device-tree isn't unflattened
128 */
mpc86xx_hpcn_probe(void)129 static int __init mpc86xx_hpcn_probe(void)
130 {
131 unsigned long root = of_get_flat_dt_root();
132
133 if (of_flat_dt_is_compatible(root, "fsl,mpc8641hpcn"))
134 return 1; /* Looks good */
135
136 /* Be nice and don't give silent boot death. Delete this in 2.6.27 */
137 if (of_flat_dt_is_compatible(root, "mpc86xx")) {
138 pr_warning("WARNING: your dts/dtb is old. You must update before the next kernel release\n");
139 return 1;
140 }
141
142 return 0;
143 }
144
145 static long __init
mpc86xx_time_init(void)146 mpc86xx_time_init(void)
147 {
148 unsigned int temp;
149
150 /* Set the time base to zero */
151 mtspr(SPRN_TBWL, 0);
152 mtspr(SPRN_TBWU, 0);
153
154 temp = mfspr(SPRN_HID0);
155 temp |= HID0_TBEN;
156 mtspr(SPRN_HID0, temp);
157 asm volatile("isync");
158
159 return 0;
160 }
161
162 static __initdata struct of_device_id of_bus_ids[] = {
163 { .compatible = "simple-bus", },
164 { .compatible = "fsl,srio", },
165 { .compatible = "gianfar", },
166 {},
167 };
168
declare_of_platform_devices(void)169 static int __init declare_of_platform_devices(void)
170 {
171 of_platform_bus_probe(NULL, of_bus_ids, NULL);
172
173 return 0;
174 }
175 machine_device_initcall(mpc86xx_hpcn, declare_of_platform_devices);
176 machine_arch_initcall(mpc86xx_hpcn, swiotlb_setup_bus_notifier);
177
define_machine(mpc86xx_hpcn)178 define_machine(mpc86xx_hpcn) {
179 .name = "MPC86xx HPCN",
180 .probe = mpc86xx_hpcn_probe,
181 .setup_arch = mpc86xx_hpcn_setup_arch,
182 .init_IRQ = mpc86xx_init_irq,
183 .show_cpuinfo = mpc86xx_hpcn_show_cpuinfo,
184 .get_irq = mpic_get_irq,
185 .restart = fsl_rstcr_restart,
186 .time_init = mpc86xx_time_init,
187 .calibrate_decr = generic_calibrate_decr,
188 .progress = udbg_progress,
189 #ifdef CONFIG_PCI
190 .pcibios_fixup_bus = fsl_pcibios_fixup_bus,
191 #endif
192 };
193