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>
38 #include "mpc8641_hpcn.h"
43 #define DBG(fmt...) do { printk(KERN_ERR fmt); } while(0)
45 #define DBG(fmt...) do { } while(0)
49 static void mpc86xx_8259_cascade(unsigned int irq, struct irq_desc *desc)
51 unsigned int cascade_irq = i8259_irq();
52 if (cascade_irq != NO_IRQ)
53 generic_handle_irq(cascade_irq);
56 #endif /* CONFIG_PCI */
59 mpc86xx_hpcn_init_irq(void)
62 struct device_node *np;
65 struct device_node *cascade_node = NULL;
69 /* Determine PIC address. */
70 np = of_find_node_by_type(NULL, "open-pic");
73 of_address_to_resource(np, 0, &res);
75 /* Alloc mpic structure and per isu has 16 INT entries. */
76 mpic1 = mpic_alloc(np, res.start,
77 MPIC_PRIMARY | MPIC_WANTS_RESET | MPIC_BIG_ENDIAN,
79 BUG_ON(mpic1 == NULL);
84 /* Initialize i8259 controller */
85 for_each_node_by_type(np, "interrupt-controller")
86 if (of_device_is_compatible(np, "chrp,iic")) {
90 if (cascade_node == NULL) {
91 printk(KERN_DEBUG "mpc86xxhpcn: no ISA interrupt controller\n");
95 cascade_irq = irq_of_parse_and_map(cascade_node, 0);
96 if (cascade_irq == NO_IRQ) {
97 printk(KERN_ERR "mpc86xxhpcn: failed to map cascade interrupt");
100 DBG("mpc86xxhpcn: cascade mapped to irq %d\n", cascade_irq);
102 i8259_init(cascade_node, 0);
103 of_node_put(cascade_node);
105 set_irq_chained_handler(cascade_irq, mpc86xx_8259_cascade);
110 extern int uses_fsl_uli_m1575;
111 extern int uli_exclude_device(struct pci_controller *hose,
112 u_char bus, u_char devfn);
114 static int mpc86xx_exclude_device(struct pci_controller *hose,
115 u_char bus, u_char devfn)
117 struct device_node* node;
118 struct resource rsrc;
120 node = (struct device_node *)hose->arch_data;
121 of_address_to_resource(node, 0, &rsrc);
123 if ((rsrc.start & 0xfffff) == 0x8000) {
124 return uli_exclude_device(hose, bus, devfn);
127 return PCIBIOS_SUCCESSFUL;
129 #endif /* CONFIG_PCI */
133 mpc86xx_hpcn_setup_arch(void)
135 struct device_node *np;
138 ppc_md.progress("mpc86xx_hpcn_setup_arch()", 0);
140 np = of_find_node_by_type(NULL, "cpu");
142 const unsigned int *fp;
144 fp = of_get_property(np, "clock-frequency", NULL);
146 loops_per_jiffy = *fp / HZ;
148 loops_per_jiffy = 50000000 / HZ;
153 for (np = NULL; (np = of_find_node_by_type(np, "pci")) != NULL;) {
154 struct resource rsrc;
155 of_address_to_resource(np, 0, &rsrc);
156 if ((rsrc.start & 0xfffff) == 0x8000)
157 fsl_add_bridge(np, 1);
159 fsl_add_bridge(np, 0);
161 uses_fsl_uli_m1575 = 1;
162 ppc_md.pci_exclude_device = mpc86xx_exclude_device;
166 printk("MPC86xx HPCN board from Freescale Semiconductor\n");
175 mpc86xx_hpcn_show_cpuinfo(struct seq_file *m)
177 struct device_node *root;
178 uint memsize = total_memory;
179 const char *model = "";
180 uint svid = mfspr(SPRN_SVR);
182 seq_printf(m, "Vendor\t\t: Freescale Semiconductor\n");
184 root = of_find_node_by_path("/");
186 model = of_get_property(root, "model", NULL);
187 seq_printf(m, "Machine\t\t: %s\n", model);
190 seq_printf(m, "SVR\t\t: 0x%x\n", svid);
191 seq_printf(m, "Memory\t\t: %d MB\n", memsize / (1024 * 1024));
196 * Called very early, device-tree isn't unflattened
198 static int __init mpc86xx_hpcn_probe(void)
200 unsigned long root = of_get_flat_dt_root();
202 if (of_flat_dt_is_compatible(root, "mpc86xx"))
203 return 1; /* Looks good */
210 mpc86xx_restart(char *cmd)
214 rstcr = ioremap(get_immrbase() + MPC86XX_RSTCR_OFFSET, 0x100);
218 /* Assert reset request to Reset Control Register */
219 out_be32(rstcr, 0x2);
226 mpc86xx_time_init(void)
230 /* Set the time base to zero */
234 temp = mfspr(SPRN_HID0);
236 mtspr(SPRN_HID0, temp);
237 asm volatile("isync");
242 define_machine(mpc86xx_hpcn) {
243 .name = "MPC86xx HPCN",
244 .probe = mpc86xx_hpcn_probe,
245 .setup_arch = mpc86xx_hpcn_setup_arch,
246 .init_IRQ = mpc86xx_hpcn_init_irq,
247 .show_cpuinfo = mpc86xx_hpcn_show_cpuinfo,
248 .get_irq = mpic_get_irq,
249 .restart = mpc86xx_restart,
250 .time_init = mpc86xx_time_init,
251 .calibrate_decr = generic_calibrate_decr,
252 .progress = udbg_progress,
254 .pcibios_fixup_bus = fsl_pcibios_fixup_bus,