2 * MPC85xx setup and early boot code plus other random bits.
4 * Maintained by Kumar Gala (see MAINTAINERS for contact information)
6 * Copyright 2005 Freescale Semiconductor Inc.
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
14 #include <linux/config.h>
15 #include <linux/stddef.h>
16 #include <linux/kernel.h>
17 #include <linux/init.h>
18 #include <linux/errno.h>
19 #include <linux/reboot.h>
20 #include <linux/pci.h>
21 #include <linux/kdev_t.h>
22 #include <linux/major.h>
23 #include <linux/console.h>
24 #include <linux/delay.h>
25 #include <linux/seq_file.h>
26 #include <linux/root_dev.h>
27 #include <linux/initrd.h>
28 #include <linux/module.h>
29 #include <linux/fsl_devices.h>
31 #include <asm/system.h>
32 #include <asm/pgtable.h>
34 #include <asm/atomic.h>
37 #include <asm/machdep.h>
39 #include <asm/bootinfo.h>
40 #include <asm/pci-bridge.h>
41 #include <asm/mpc85xx.h>
43 #include <mm/mmu_decl.h>
47 #include <asm/i8259.h>
49 #include <sysdev/fsl_soc.h>
53 unsigned long isa_io_base = 0;
54 unsigned long isa_mem_base = 0;
57 static int cds_pci_slot = 2;
58 static volatile u8 *cadmus;
63 #define ARCADIA_HOST_BRIDGE_IDSEL 17
64 #define ARCADIA_2ND_BRIDGE_IDSEL 3
66 extern int mpc85xx_pci2_busno;
69 mpc85xx_exclude_device(u_char bus, u_char devfn)
71 if (bus == 0 && PCI_SLOT(devfn) == 0)
72 return PCIBIOS_DEVICE_NOT_FOUND;
73 if (mpc85xx_pci2_busno)
74 if (bus == (mpc85xx_pci2_busno) && PCI_SLOT(devfn) == 0)
75 return PCIBIOS_DEVICE_NOT_FOUND;
76 /* We explicitly do not go past the Tundra 320 Bridge */
77 if ((bus == 1) && (PCI_SLOT(devfn) == ARCADIA_2ND_BRIDGE_IDSEL))
78 return PCIBIOS_DEVICE_NOT_FOUND;
79 if ((bus == 0) && (PCI_SLOT(devfn) == ARCADIA_2ND_BRIDGE_IDSEL))
80 return PCIBIOS_DEVICE_NOT_FOUND;
82 return PCIBIOS_SUCCESSFUL;
86 mpc85xx_cds_pcibios_fixup(void)
91 if ((dev = pci_get_device(PCI_VENDOR_ID_VIA,
92 PCI_DEVICE_ID_VIA_82C586_1, NULL))) {
94 * U-Boot does not set the enable bits
95 * for the IDE device. Force them on here.
97 pci_read_config_byte(dev, 0x40, &c);
98 c |= 0x03; /* IDE: Chip Enable Bits */
99 pci_write_config_byte(dev, 0x40, c);
102 * Since only primary interface works, force the
103 * IDE function to standard primary IDE interrupt
107 pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq);
112 * Force legacy USB interrupt routing
114 if ((dev = pci_get_device(PCI_VENDOR_ID_VIA,
115 PCI_DEVICE_ID_VIA_82C586_2, NULL))) {
117 pci_write_config_byte(dev, PCI_INTERRUPT_LINE, 10);
121 if ((dev = pci_get_device(PCI_VENDOR_ID_VIA,
122 PCI_DEVICE_ID_VIA_82C586_2, dev))) {
124 pci_write_config_byte(dev, PCI_INTERRUPT_LINE, 11);
128 /* Now map all the PCI irqs */
130 for_each_pci_dev(dev)
131 pci_read_irq_line(dev);
134 #ifdef CONFIG_PPC_I8259
135 #warning The i8259 PIC support is currently broken
136 static void mpc85xx_8259_cascade(unsigned int irq, struct
137 irq_desc *desc, struct pt_regs *regs)
139 unsigned int cascade_irq = i8259_irq(regs);
141 if (cascade_irq != NO_IRQ)
142 generic_handle_irq(cascade_irq, regs);
144 desc->chip->eoi(irq);
146 #endif /* PPC_I8259 */
147 #endif /* CONFIG_PCI */
149 void __init mpc85xx_cds_pic_init(void)
153 struct device_node *np = NULL;
154 struct device_node *cascade_node = NULL;
157 np = of_find_node_by_type(np, "open-pic");
160 printk(KERN_ERR "Could not find open-pic node\n");
164 if (of_address_to_resource(np, 0, &r)) {
165 printk(KERN_ERR "Failed to map mpic register space\n");
170 mpic = mpic_alloc(np, r.start,
171 MPIC_PRIMARY | MPIC_WANTS_RESET | MPIC_BIG_ENDIAN,
173 BUG_ON(mpic == NULL);
175 /* Return the mpic node */
178 mpic_assign_isu(mpic, 0, r.start + 0x10200);
179 mpic_assign_isu(mpic, 1, r.start + 0x10280);
180 mpic_assign_isu(mpic, 2, r.start + 0x10300);
181 mpic_assign_isu(mpic, 3, r.start + 0x10380);
182 mpic_assign_isu(mpic, 4, r.start + 0x10400);
183 mpic_assign_isu(mpic, 5, r.start + 0x10480);
184 mpic_assign_isu(mpic, 6, r.start + 0x10500);
185 mpic_assign_isu(mpic, 7, r.start + 0x10580);
187 /* Used only for 8548 so far, but no harm in
188 * allocating them for everyone */
189 mpic_assign_isu(mpic, 8, r.start + 0x10600);
190 mpic_assign_isu(mpic, 9, r.start + 0x10680);
191 mpic_assign_isu(mpic, 10, r.start + 0x10700);
192 mpic_assign_isu(mpic, 11, r.start + 0x10780);
194 /* External Interrupts */
195 mpic_assign_isu(mpic, 12, r.start + 0x10000);
196 mpic_assign_isu(mpic, 13, r.start + 0x10080);
197 mpic_assign_isu(mpic, 14, r.start + 0x10100);
201 #ifdef CONFIG_PPC_I8259
202 /* Initialize the i8259 controller */
203 for_each_node_by_type(np, "interrupt-controller")
204 if (device_is_compatible(np, "chrp,iic")) {
209 if (cascade_node == NULL) {
210 printk(KERN_DEBUG "Could not find i8259 PIC\n");
214 cascade_irq = irq_of_parse_and_map(cascade_node, 0);
215 if (cascade_irq == NO_IRQ) {
216 printk(KERN_ERR "Failed to map cascade interrupt\n");
220 i8259_init(cascade_node, 0);
221 of_node_put(cascade_node);
223 set_irq_chained_handler(cascade_irq, mpc85xx_8259_cascade);
224 #endif /* CONFIG_PPC_I8259 */
229 * Setup the architecture
232 mpc85xx_cds_setup_arch(void)
234 struct device_node *cpu;
236 struct device_node *np;
240 ppc_md.progress("mpc85xx_cds_setup_arch()", 0);
242 cpu = of_find_node_by_type(NULL, "cpu");
244 const unsigned int *fp;
246 fp = get_property(cpu, "clock-frequency", NULL);
248 loops_per_jiffy = *fp / HZ;
250 loops_per_jiffy = 500000000 / HZ;
254 cadmus = ioremap(CADMUS_BASE, CADMUS_SIZE);
255 cds_pci_slot = ((cadmus[CM_CSR] >> 6) & 0x3) + 1;
257 if (ppc_md.progress) {
259 snprintf(buf, 40, "CDS Version = 0x%x in slot %d\n",
260 cadmus[CM_VER], cds_pci_slot);
261 ppc_md.progress(buf, 0);
265 for (np = NULL; (np = of_find_node_by_type(np, "pci")) != NULL;)
268 ppc_md.pcibios_fixup = mpc85xx_cds_pcibios_fixup;
269 ppc_md.pci_exclude_device = mpc85xx_exclude_device;
272 #ifdef CONFIG_ROOT_NFS
275 ROOT_DEV = Root_HDA1;
281 mpc85xx_cds_show_cpuinfo(struct seq_file *m)
283 uint pvid, svid, phid1;
284 uint memsize = total_memory;
286 pvid = mfspr(SPRN_PVR);
287 svid = mfspr(SPRN_SVR);
289 seq_printf(m, "Vendor\t\t: Freescale Semiconductor\n");
290 seq_printf(m, "Machine\t\t: MPC85xx CDS (0x%x)\n", cadmus[CM_VER]);
291 seq_printf(m, "PVR\t\t: 0x%x\n", pvid);
292 seq_printf(m, "SVR\t\t: 0x%x\n", svid);
294 /* Display cpu Pll setting */
295 phid1 = mfspr(SPRN_HID1);
296 seq_printf(m, "PLL setting\t: 0x%x\n", ((phid1 >> 24) & 0x3f));
298 /* Display the amount of memory */
299 seq_printf(m, "Memory\t\t: %d MB\n", memsize / (1024 * 1024));
304 * Called very early, device-tree isn't unflattened
306 static int __init mpc85xx_cds_probe(void)
308 /* We always match for now, eventually we should look at
309 * the flat dev tree to ensure this is the board we are
315 define_machine(mpc85xx_cds) {
316 .name = "MPC85xx CDS",
317 .probe = mpc85xx_cds_probe,
318 .setup_arch = mpc85xx_cds_setup_arch,
319 .init_IRQ = mpc85xx_cds_pic_init,
320 .show_cpuinfo = mpc85xx_cds_show_cpuinfo,
321 .get_irq = mpic_get_irq,
322 .restart = mpc85xx_restart,
323 .calibrate_decr = generic_calibrate_decr,
324 .progress = udbg_progress,