2 * MPC86xx HPCN board specific routines
4 * Recode: ZHANG WEI <wei.zhang@freescale.com>
5 * Initial author: Xianghua Xiao <x.xiao@freescale.com>
7 * Copyright 2006 Freescale Semiconductor Inc.
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.
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>
22 #include <asm/system.h>
24 #include <asm/machdep.h>
25 #include <asm/pci-bridge.h>
26 #include <asm/mpc86xx.h>
28 #include <mm/mmu_decl.h>
30 #include <asm/i8259.h>
34 #include <sysdev/fsl_pci.h>
35 #include <sysdev/fsl_soc.h>
42 #define DBG(fmt...) do { printk(KERN_ERR fmt); } while(0)
44 #define DBG(fmt...) do { } while(0)
48 static void mpc86xx_8259_cascade(unsigned int irq, struct irq_desc *desc)
50 unsigned int cascade_irq = i8259_irq();
51 if (cascade_irq != NO_IRQ)
52 generic_handle_irq(cascade_irq);
55 #endif /* CONFIG_PCI */
58 mpc86xx_hpcn_init_irq(void)
61 struct device_node *np;
64 struct device_node *cascade_node = NULL;
68 /* Determine PIC address. */
69 np = of_find_node_by_type(NULL, "open-pic");
72 of_address_to_resource(np, 0, &res);
74 /* Alloc mpic structure and per isu has 16 INT entries. */
75 mpic1 = mpic_alloc(np, res.start,
76 MPIC_PRIMARY | MPIC_WANTS_RESET | MPIC_BIG_ENDIAN,
78 BUG_ON(mpic1 == NULL);
83 /* Initialize i8259 controller */
84 for_each_node_by_type(np, "interrupt-controller")
85 if (of_device_is_compatible(np, "chrp,iic")) {
89 if (cascade_node == NULL) {
90 printk(KERN_DEBUG "mpc86xxhpcn: no ISA interrupt controller\n");
94 cascade_irq = irq_of_parse_and_map(cascade_node, 0);
95 if (cascade_irq == NO_IRQ) {
96 printk(KERN_ERR "mpc86xxhpcn: failed to map cascade interrupt");
99 DBG("mpc86xxhpcn: cascade mapped to irq %d\n", cascade_irq);
101 i8259_init(cascade_node, 0);
102 of_node_put(cascade_node);
104 set_irq_chained_handler(cascade_irq, mpc86xx_8259_cascade);
109 extern int uses_fsl_uli_m1575;
110 extern int uli_exclude_device(struct pci_controller *hose,
111 u_char bus, u_char devfn);
113 static int mpc86xx_exclude_device(struct pci_controller *hose,
114 u_char bus, u_char devfn)
116 struct device_node* node;
117 struct resource rsrc;
119 node = (struct device_node *)hose->arch_data;
120 of_address_to_resource(node, 0, &rsrc);
122 if ((rsrc.start & 0xfffff) == 0x8000) {
123 return uli_exclude_device(hose, bus, devfn);
126 return PCIBIOS_SUCCESSFUL;
128 #endif /* CONFIG_PCI */
132 mpc86xx_hpcn_setup_arch(void)
135 struct device_node *np;
139 ppc_md.progress("mpc86xx_hpcn_setup_arch()", 0);
142 for_each_compatible_node(np, "pci", "fsl,mpc8641-pcie") {
143 struct resource rsrc;
144 of_address_to_resource(np, 0, &rsrc);
145 if ((rsrc.start & 0xfffff) == 0x8000)
146 fsl_add_bridge(np, 1);
148 fsl_add_bridge(np, 0);
151 uses_fsl_uli_m1575 = 1;
152 ppc_md.pci_exclude_device = mpc86xx_exclude_device;
156 printk("MPC86xx HPCN board from Freescale Semiconductor\n");
165 mpc86xx_hpcn_show_cpuinfo(struct seq_file *m)
167 struct device_node *root;
168 uint memsize = total_memory;
169 const char *model = "";
170 uint svid = mfspr(SPRN_SVR);
172 seq_printf(m, "Vendor\t\t: Freescale Semiconductor\n");
174 root = of_find_node_by_path("/");
176 model = of_get_property(root, "model", NULL);
177 seq_printf(m, "Machine\t\t: %s\n", model);
180 seq_printf(m, "SVR\t\t: 0x%x\n", svid);
181 seq_printf(m, "Memory\t\t: %d MB\n", memsize / (1024 * 1024));
186 * Called very early, device-tree isn't unflattened
188 static int __init mpc86xx_hpcn_probe(void)
190 unsigned long root = of_get_flat_dt_root();
192 if (of_flat_dt_is_compatible(root, "mpc86xx"))
193 return 1; /* Looks good */
199 mpc86xx_time_init(void)
203 /* Set the time base to zero */
207 temp = mfspr(SPRN_HID0);
209 mtspr(SPRN_HID0, temp);
210 asm volatile("isync");
215 define_machine(mpc86xx_hpcn) {
216 .name = "MPC86xx HPCN",
217 .probe = mpc86xx_hpcn_probe,
218 .setup_arch = mpc86xx_hpcn_setup_arch,
219 .init_IRQ = mpc86xx_hpcn_init_irq,
220 .show_cpuinfo = mpc86xx_hpcn_show_cpuinfo,
221 .get_irq = mpic_get_irq,
222 .restart = fsl_rstcr_restart,
223 .time_init = mpc86xx_time_init,
224 .calibrate_decr = generic_calibrate_decr,
225 .progress = udbg_progress,
227 .pcibios_fixup_bus = fsl_pcibios_fixup_bus,