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c5d56332 ZR |
1 | /* |
2 | * mpc7448_hpc2.c | |
3 | * | |
c4342ff9 | 4 | * Board setup routines for the Freescale mpc7448hpc2(taiga) platform |
c5d56332 ZR |
5 | * |
6 | * Author: Jacob Pan | |
7 | * jacob.pan@freescale.com | |
8 | * Author: Xianghua Xiao | |
9 | * x.xiao@freescale.com | |
10 | * Maintainer: Roy Zang <tie-fei.zang@freescale.com> | |
11 | * Add Flat Device Tree support fot mpc7448hpc2 board | |
12 | * | |
13 | * Copyright 2004-2006 Freescale Semiconductor, Inc. | |
14 | * | |
c4342ff9 ZR |
15 | * This program is free software; you can redistribute it and/or |
16 | * modify it under the terms of the GNU General Public License | |
17 | * as published by the Free Software Foundation; either version | |
18 | * 2 of the License, or (at your option) any later version. | |
c5d56332 ZR |
19 | */ |
20 | ||
21 | #include <linux/config.h> | |
22 | #include <linux/stddef.h> | |
23 | #include <linux/kernel.h> | |
24 | #include <linux/pci.h> | |
25 | #include <linux/kdev_t.h> | |
26 | #include <linux/console.h> | |
27 | #include <linux/delay.h> | |
28 | #include <linux/irq.h> | |
29 | #include <linux/ide.h> | |
30 | #include <linux/seq_file.h> | |
31 | #include <linux/root_dev.h> | |
32 | #include <linux/serial.h> | |
33 | #include <linux/tty.h> | |
34 | #include <linux/serial_core.h> | |
35 | ||
36 | #include <asm/system.h> | |
37 | #include <asm/time.h> | |
38 | #include <asm/machdep.h> | |
39 | #include <asm/prom.h> | |
40 | #include <asm/udbg.h> | |
41 | #include <asm/tsi108.h> | |
42 | #include <asm/pci-bridge.h> | |
43 | #include <asm/reg.h> | |
44 | #include <mm/mmu_decl.h> | |
45 | #include "mpc7448_hpc2.h" | |
46 | #include <asm/tsi108_irq.h> | |
47 | #include <asm/mpic.h> | |
48 | ||
49 | #undef DEBUG | |
50 | #ifdef DEBUG | |
51 | #define DBG(fmt...) do { printk(fmt); } while(0) | |
52 | #else | |
53 | #define DBG(fmt...) do { } while(0) | |
54 | #endif | |
55 | ||
56 | #ifndef CONFIG_PCI | |
57 | isa_io_base = MPC7448_HPC2_ISA_IO_BASE; | |
58 | isa_mem_base = MPC7448_HPC2_ISA_MEM_BASE; | |
59 | pci_dram_offset = MPC7448_HPC2_PCI_MEM_OFFSET; | |
60 | #endif | |
61 | ||
62 | extern int tsi108_setup_pci(struct device_node *dev); | |
63 | extern void _nmask_and_or_msr(unsigned long nmask, unsigned long or_val); | |
64 | extern void tsi108_pci_int_init(void); | |
c4342ff9 ZR |
65 | extern void tsi108_irq_cascade(unsigned int irq, struct irq_desc *desc, |
66 | struct pt_regs *regs); | |
c5d56332 ZR |
67 | |
68 | int mpc7448_hpc2_exclude_device(u_char bus, u_char devfn) | |
69 | { | |
70 | if (bus == 0 && PCI_SLOT(devfn) == 0) | |
71 | return PCIBIOS_DEVICE_NOT_FOUND; | |
72 | else | |
73 | return PCIBIOS_SUCCESSFUL; | |
74 | } | |
75 | ||
76 | /* | |
77 | * find pci slot by devfn in interrupt map of OF tree | |
78 | */ | |
79 | u8 find_slot_by_devfn(unsigned int *interrupt_map, unsigned int devfn) | |
80 | { | |
81 | int i; | |
82 | unsigned int tmp; | |
83 | for (i = 0; i < 4; i++){ | |
84 | tmp = interrupt_map[i*4*7]; | |
85 | if ((tmp >> 11) == (devfn >> 3)) | |
86 | return i; | |
87 | } | |
88 | return i; | |
89 | } | |
90 | ||
91 | /* | |
92 | * Scans the interrupt map for pci device | |
93 | */ | |
94 | void mpc7448_hpc2_fixup_irq(struct pci_dev *dev) | |
95 | { | |
96 | struct pci_controller *hose; | |
97 | struct device_node *node; | |
98 | unsigned int *interrupt; | |
99 | int busnr; | |
100 | int len; | |
101 | u8 slot; | |
102 | u8 pin; | |
103 | ||
104 | /* Lookup the hose */ | |
105 | busnr = dev->bus->number; | |
106 | hose = pci_bus_to_hose(busnr); | |
107 | if (!hose) | |
108 | printk(KERN_ERR "No pci hose found\n"); | |
109 | ||
110 | /* Check it has an OF node associated */ | |
111 | node = (struct device_node *) hose->arch_data; | |
112 | if (!node) | |
113 | printk(KERN_ERR "No pci node found\n"); | |
114 | ||
115 | interrupt = (unsigned int *) get_property(node, "interrupt-map", &len); | |
116 | slot = find_slot_by_devfn(interrupt, dev->devfn); | |
117 | pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin); | |
118 | if (pin == 0 || pin > 4) | |
119 | pin = 1; | |
120 | pin--; | |
121 | dev->irq = interrupt[slot*4*7 + pin*7 + 5]; | |
122 | DBG("TSI_PCI: dev->irq = 0x%x\n", dev->irq); | |
123 | } | |
124 | /* temporary pci irq map fixup*/ | |
125 | ||
126 | void __init mpc7448_hpc2_pcibios_fixup(void) | |
127 | { | |
128 | struct pci_dev *dev = NULL; | |
129 | for_each_pci_dev(dev) { | |
130 | mpc7448_hpc2_fixup_irq(dev); | |
131 | pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq); | |
132 | } | |
133 | } | |
134 | ||
135 | static void __init mpc7448_hpc2_setup_arch(void) | |
136 | { | |
137 | struct device_node *cpu; | |
138 | struct device_node *np; | |
139 | if (ppc_md.progress) | |
140 | ppc_md.progress("mpc7448_hpc2_setup_arch():set_bridge", 0); | |
141 | ||
142 | cpu = of_find_node_by_type(NULL, "cpu"); | |
143 | if (cpu != 0) { | |
144 | unsigned int *fp; | |
145 | ||
146 | fp = (int *)get_property(cpu, "clock-frequency", NULL); | |
147 | if (fp != 0) | |
148 | loops_per_jiffy = *fp / HZ; | |
149 | else | |
150 | loops_per_jiffy = 50000000 / HZ; | |
151 | of_node_put(cpu); | |
152 | } | |
153 | tsi108_csr_vir_base = get_vir_csrbase(); | |
154 | ||
155 | #ifdef CONFIG_ROOT_NFS | |
156 | ROOT_DEV = Root_NFS; | |
157 | #else | |
158 | ROOT_DEV = Root_HDA1; | |
159 | #endif | |
160 | ||
161 | #ifdef CONFIG_BLK_DEV_INITRD | |
162 | ROOT_DEV = Root_RAM0; | |
163 | #endif | |
164 | ||
165 | /* setup PCI host bridge */ | |
166 | #ifdef CONFIG_PCI | |
167 | for (np = NULL; (np = of_find_node_by_type(np, "pci")) != NULL;) | |
168 | tsi108_setup_pci(np); | |
169 | ||
170 | ppc_md.pci_exclude_device = mpc7448_hpc2_exclude_device; | |
171 | if (ppc_md.progress) | |
172 | ppc_md.progress("tsi108: resources set", 0x100); | |
173 | #endif | |
174 | ||
175 | printk(KERN_INFO "MPC7448HPC2 (TAIGA) Platform\n"); | |
176 | printk(KERN_INFO | |
177 | "Jointly ported by Freescale and Tundra Semiconductor\n"); | |
178 | printk(KERN_INFO | |
179 | "Enabling L2 cache then enabling the HID0 prefetch engine.\n"); | |
180 | } | |
181 | ||
182 | /* | |
183 | * Interrupt setup and service. Interrrupts on the mpc7448_hpc2 come | |
184 | * from the four external INT pins, PCI interrupts are routed via | |
185 | * PCI interrupt control registers, it generates internal IRQ23 | |
186 | * | |
187 | * Interrupt routing on the Taiga Board: | |
188 | * TSI108:PB_INT[0] -> CPU0:INT# | |
189 | * TSI108:PB_INT[1] -> CPU0:MCP# | |
190 | * TSI108:PB_INT[2] -> N/C | |
191 | * TSI108:PB_INT[3] -> N/C | |
192 | */ | |
193 | static void __init mpc7448_hpc2_init_IRQ(void) | |
194 | { | |
195 | struct mpic *mpic; | |
196 | phys_addr_t mpic_paddr = 0; | |
c4342ff9 ZR |
197 | unsigned int cascade_pci_irq; |
198 | struct device_node *tsi_pci; | |
c5d56332 ZR |
199 | struct device_node *tsi_pic; |
200 | ||
201 | tsi_pic = of_find_node_by_type(NULL, "open-pic"); | |
202 | if (tsi_pic) { | |
203 | unsigned int size; | |
204 | void *prop = get_property(tsi_pic, "reg", &size); | |
205 | mpic_paddr = of_translate_address(tsi_pic, prop); | |
206 | } | |
207 | ||
208 | if (mpic_paddr == 0) { | |
209 | printk("%s: No tsi108 PIC found !\n", __FUNCTION__); | |
210 | return; | |
211 | } | |
212 | ||
213 | DBG("%s: tsi108pic phys_addr = 0x%x\n", __FUNCTION__, | |
214 | (u32) mpic_paddr); | |
215 | ||
c4342ff9 | 216 | mpic = mpic_alloc(tsi_pic, mpic_paddr, |
c5d56332 | 217 | MPIC_PRIMARY | MPIC_BIG_ENDIAN | MPIC_WANTS_RESET | |
7233593b | 218 | MPIC_SPV_EOI | MPIC_NO_PTHROU_DIS | MPIC_REGSET_TSI108, |
c5d56332 | 219 | 0, /* num_sources used */ |
c5d56332 | 220 | 0, /* num_sources used */ |
c4342ff9 | 221 | "Tsi108_PIC"); |
c5d56332 ZR |
222 | |
223 | BUG_ON(mpic == NULL); /* XXXX */ | |
c5d56332 | 224 | mpic_init(mpic); |
c4342ff9 ZR |
225 | |
226 | tsi_pci = of_find_node_by_type(NULL, "pci"); | |
227 | if (tsi_pci == 0) { | |
228 | printk("%s: No tsi108 pci node found !\n", __FUNCTION__); | |
229 | return; | |
230 | } | |
231 | ||
232 | cascade_pci_irq = irq_of_parse_and_map(tsi_pci, 0); | |
233 | set_irq_data(cascade_pci_irq, mpic); | |
234 | set_irq_chained_handler(cascade_pci_irq, tsi108_irq_cascade); | |
235 | ||
c5d56332 ZR |
236 | tsi108_pci_int_init(); |
237 | ||
238 | /* Configure MPIC outputs to CPU0 */ | |
239 | tsi108_write_reg(TSI108_MPIC_OFFSET + 0x30c, 0); | |
c4342ff9 | 240 | of_node_put(tsi_pic); |
c5d56332 ZR |
241 | } |
242 | ||
243 | void mpc7448_hpc2_show_cpuinfo(struct seq_file *m) | |
244 | { | |
245 | seq_printf(m, "vendor\t\t: Freescale Semiconductor\n"); | |
246 | seq_printf(m, "machine\t\t: MPC7448hpc2\n"); | |
247 | } | |
248 | ||
249 | void mpc7448_hpc2_restart(char *cmd) | |
250 | { | |
251 | local_irq_disable(); | |
252 | ||
253 | /* Set exception prefix high - to the firmware */ | |
254 | _nmask_and_or_msr(0, MSR_IP); | |
255 | ||
256 | for (;;) ; /* Spin until reset happens */ | |
257 | } | |
258 | ||
259 | void mpc7448_hpc2_power_off(void) | |
260 | { | |
261 | local_irq_disable(); | |
262 | for (;;) ; /* No way to shut power off with software */ | |
263 | } | |
264 | ||
265 | void mpc7448_hpc2_halt(void) | |
266 | { | |
267 | mpc7448_hpc2_power_off(); | |
268 | } | |
269 | ||
270 | /* | |
271 | * Called very early, device-tree isn't unflattened | |
272 | */ | |
273 | static int __init mpc7448_hpc2_probe(void) | |
274 | { | |
275 | unsigned long root = of_get_flat_dt_root(); | |
276 | ||
277 | if (!of_flat_dt_is_compatible(root, "mpc74xx")) | |
278 | return 0; | |
279 | return 1; | |
280 | } | |
281 | ||
282 | static int mpc7448_machine_check_exception(struct pt_regs *regs) | |
283 | { | |
284 | extern void tsi108_clear_pci_cfg_error(void); | |
285 | const struct exception_table_entry *entry; | |
286 | ||
287 | /* Are we prepared to handle this fault */ | |
288 | if ((entry = search_exception_tables(regs->nip)) != NULL) { | |
289 | tsi108_clear_pci_cfg_error(); | |
290 | regs->msr |= MSR_RI; | |
291 | regs->nip = entry->fixup; | |
292 | return 1; | |
293 | } | |
294 | return 0; | |
295 | ||
296 | } | |
c4342ff9 | 297 | |
c5d56332 ZR |
298 | define_machine(mpc7448_hpc2){ |
299 | .name = "MPC7448 HPC2", | |
300 | .probe = mpc7448_hpc2_probe, | |
301 | .setup_arch = mpc7448_hpc2_setup_arch, | |
302 | .init_IRQ = mpc7448_hpc2_init_IRQ, | |
303 | .show_cpuinfo = mpc7448_hpc2_show_cpuinfo, | |
304 | .get_irq = mpic_get_irq, | |
305 | .pcibios_fixup = mpc7448_hpc2_pcibios_fixup, | |
306 | .restart = mpc7448_hpc2_restart, | |
307 | .calibrate_decr = generic_calibrate_decr, | |
308 | .machine_check_exception= mpc7448_machine_check_exception, | |
309 | .progress = udbg_progress, | |
310 | }; |