4 * Board setup routines for the Freescale Taiga platform
7 * jacob.pan@freescale.com
8 * Author: Xianghua Xiao
10 * Maintainer: Roy Zang <tie-fei.zang@freescale.com>
11 * Add Flat Device Tree support fot mpc7448hpc2 board
13 * Copyright 2004-2006 Freescale Semiconductor, Inc.
15 * This file is licensed under
16 * the terms of the GNU General Public License version 2. This program
17 * is licensed "as is" without any warranty of any kind, whether express
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>
36 #include <asm/system.h>
38 #include <asm/machdep.h>
41 #include <asm/tsi108.h>
42 #include <asm/pci-bridge.h>
44 #include <mm/mmu_decl.h>
45 #include "mpc7448_hpc2.h"
46 #include <asm/tsi108_irq.h>
51 #define DBG(fmt...) do { printk(fmt); } while(0)
53 #define DBG(fmt...) do { } while(0)
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
;
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);
65 extern int tsi108_irq_cascade(struct pt_regs
*regs
, void *unused
);
68 * Define all of the IRQ senses and polarities. Taken from the
70 * Note: Likely, this table and the following function should be
71 * obtained and derived from the OF Device Tree.
74 static u_char mpc7448_hpc2_pic_initsenses
[] __initdata
= {
75 /* External on-board sources */
76 (IRQ_SENSE_LEVEL
| IRQ_POLARITY_NEGATIVE
), /* INT[0] XINT0 from FPGA */
77 (IRQ_SENSE_LEVEL
| IRQ_POLARITY_NEGATIVE
), /* INT[1] XINT1 from FPGA */
78 (IRQ_SENSE_LEVEL
| IRQ_POLARITY_NEGATIVE
), /* INT[2] PHY_INT from both GIGE */
79 (IRQ_SENSE_LEVEL
| IRQ_POLARITY_NEGATIVE
), /* INT[3] RESERVED */
80 /* Internal Tsi108/109 interrupt sources */
81 (IRQ_SENSE_EDGE
| IRQ_POLARITY_POSITIVE
), /* Reserved IRQ */
82 (IRQ_SENSE_EDGE
| IRQ_POLARITY_POSITIVE
), /* Reserved IRQ */
83 (IRQ_SENSE_EDGE
| IRQ_POLARITY_POSITIVE
), /* Reserved IRQ */
84 (IRQ_SENSE_EDGE
| IRQ_POLARITY_POSITIVE
), /* Reserved IRQ */
85 (IRQ_SENSE_EDGE
| IRQ_POLARITY_POSITIVE
), /* DMA0 */
86 (IRQ_SENSE_EDGE
| IRQ_POLARITY_POSITIVE
), /* DMA1 */
87 (IRQ_SENSE_EDGE
| IRQ_POLARITY_POSITIVE
), /* DMA2 */
88 (IRQ_SENSE_EDGE
| IRQ_POLARITY_POSITIVE
), /* DMA3 */
89 (IRQ_SENSE_EDGE
| IRQ_POLARITY_POSITIVE
), /* UART0 */
90 (IRQ_SENSE_EDGE
| IRQ_POLARITY_POSITIVE
), /* UART1 */
91 (IRQ_SENSE_EDGE
| IRQ_POLARITY_POSITIVE
), /* I2C */
92 (IRQ_SENSE_EDGE
| IRQ_POLARITY_POSITIVE
), /* GPIO */
93 (IRQ_SENSE_LEVEL
| IRQ_POLARITY_POSITIVE
), /* GIGE0 */
94 (IRQ_SENSE_LEVEL
| IRQ_POLARITY_POSITIVE
), /* GIGE1 */
95 (IRQ_SENSE_EDGE
| IRQ_POLARITY_POSITIVE
), /* Reserved IRQ */
96 (IRQ_SENSE_EDGE
| IRQ_POLARITY_POSITIVE
), /* HLP */
97 (IRQ_SENSE_EDGE
| IRQ_POLARITY_POSITIVE
), /* SDC */
98 (IRQ_SENSE_EDGE
| IRQ_POLARITY_POSITIVE
), /* Processor IF */
99 (IRQ_SENSE_EDGE
| IRQ_POLARITY_POSITIVE
), /* Reserved IRQ */
100 (IRQ_SENSE_LEVEL
| IRQ_POLARITY_POSITIVE
), /* PCI/X block */
103 int mpc7448_hpc2_exclude_device(u_char bus
, u_char devfn
)
105 if (bus
== 0 && PCI_SLOT(devfn
) == 0)
106 return PCIBIOS_DEVICE_NOT_FOUND
;
108 return PCIBIOS_SUCCESSFUL
;
112 * find pci slot by devfn in interrupt map of OF tree
114 u8
find_slot_by_devfn(unsigned int *interrupt_map
, unsigned int devfn
)
118 for (i
= 0; i
< 4; i
++){
119 tmp
= interrupt_map
[i
*4*7];
120 if ((tmp
>> 11) == (devfn
>> 3))
127 * Scans the interrupt map for pci device
129 void mpc7448_hpc2_fixup_irq(struct pci_dev
*dev
)
131 struct pci_controller
*hose
;
132 struct device_node
*node
;
133 unsigned int *interrupt
;
139 /* Lookup the hose */
140 busnr
= dev
->bus
->number
;
141 hose
= pci_bus_to_hose(busnr
);
143 printk(KERN_ERR
"No pci hose found\n");
145 /* Check it has an OF node associated */
146 node
= (struct device_node
*) hose
->arch_data
;
148 printk(KERN_ERR
"No pci node found\n");
150 interrupt
= (unsigned int *) get_property(node
, "interrupt-map", &len
);
151 slot
= find_slot_by_devfn(interrupt
, dev
->devfn
);
152 pci_read_config_byte(dev
, PCI_INTERRUPT_PIN
, &pin
);
153 if (pin
== 0 || pin
> 4)
156 dev
->irq
= interrupt
[slot
*4*7 + pin
*7 + 5];
157 DBG("TSI_PCI: dev->irq = 0x%x\n", dev
->irq
);
159 /* temporary pci irq map fixup*/
161 void __init
mpc7448_hpc2_pcibios_fixup(void)
163 struct pci_dev
*dev
= NULL
;
164 for_each_pci_dev(dev
) {
165 mpc7448_hpc2_fixup_irq(dev
);
166 pci_write_config_byte(dev
, PCI_INTERRUPT_LINE
, dev
->irq
);
170 static void __init
mpc7448_hpc2_setup_arch(void)
172 struct device_node
*cpu
;
173 struct device_node
*np
;
175 ppc_md
.progress("mpc7448_hpc2_setup_arch():set_bridge", 0);
177 cpu
= of_find_node_by_type(NULL
, "cpu");
181 fp
= (int *)get_property(cpu
, "clock-frequency", NULL
);
183 loops_per_jiffy
= *fp
/ HZ
;
185 loops_per_jiffy
= 50000000 / HZ
;
188 tsi108_csr_vir_base
= get_vir_csrbase();
190 #ifdef CONFIG_ROOT_NFS
193 ROOT_DEV
= Root_HDA1
;
196 #ifdef CONFIG_BLK_DEV_INITRD
197 ROOT_DEV
= Root_RAM0
;
200 /* setup PCI host bridge */
202 for (np
= NULL
; (np
= of_find_node_by_type(np
, "pci")) != NULL
;)
203 tsi108_setup_pci(np
);
205 ppc_md
.pci_exclude_device
= mpc7448_hpc2_exclude_device
;
207 ppc_md
.progress("tsi108: resources set", 0x100);
210 printk(KERN_INFO
"MPC7448HPC2 (TAIGA) Platform\n");
212 "Jointly ported by Freescale and Tundra Semiconductor\n");
214 "Enabling L2 cache then enabling the HID0 prefetch engine.\n");
218 * Interrupt setup and service. Interrrupts on the mpc7448_hpc2 come
219 * from the four external INT pins, PCI interrupts are routed via
220 * PCI interrupt control registers, it generates internal IRQ23
222 * Interrupt routing on the Taiga Board:
223 * TSI108:PB_INT[0] -> CPU0:INT#
224 * TSI108:PB_INT[1] -> CPU0:MCP#
225 * TSI108:PB_INT[2] -> N/C
226 * TSI108:PB_INT[3] -> N/C
228 static void __init
mpc7448_hpc2_init_IRQ(void)
231 phys_addr_t mpic_paddr
= 0;
232 struct device_node
*tsi_pic
;
234 tsi_pic
= of_find_node_by_type(NULL
, "open-pic");
237 void *prop
= get_property(tsi_pic
, "reg", &size
);
238 mpic_paddr
= of_translate_address(tsi_pic
, prop
);
241 if (mpic_paddr
== 0) {
242 printk("%s: No tsi108 PIC found !\n", __FUNCTION__
);
246 DBG("%s: tsi108pic phys_addr = 0x%x\n", __FUNCTION__
,
249 mpic
= mpic_alloc(mpic_paddr
,
250 MPIC_PRIMARY
| MPIC_BIG_ENDIAN
| MPIC_WANTS_RESET
|
251 MPIC_SPV_EOI
| MPIC_MOD_ID(MPIC_ID_TSI108
),
252 0, /* num_sources used */
254 0, /* num_sources used */
255 NR_IRQS
- 4 /* XXXX */,
256 mpc7448_hpc2_pic_initsenses
,
257 sizeof(mpc7448_hpc2_pic_initsenses
), "Tsi108_PIC");
259 BUG_ON(mpic
== NULL
); /* XXXX */
262 mpic_setup_cascade(IRQ_TSI108_PCI
, tsi108_irq_cascade
, mpic
);
263 tsi108_pci_int_init();
265 /* Configure MPIC outputs to CPU0 */
266 tsi108_write_reg(TSI108_MPIC_OFFSET
+ 0x30c, 0);
269 void mpc7448_hpc2_show_cpuinfo(struct seq_file
*m
)
271 seq_printf(m
, "vendor\t\t: Freescale Semiconductor\n");
272 seq_printf(m
, "machine\t\t: MPC7448hpc2\n");
275 void mpc7448_hpc2_restart(char *cmd
)
279 /* Set exception prefix high - to the firmware */
280 _nmask_and_or_msr(0, MSR_IP
);
282 for (;;) ; /* Spin until reset happens */
285 void mpc7448_hpc2_power_off(void)
288 for (;;) ; /* No way to shut power off with software */
291 void mpc7448_hpc2_halt(void)
293 mpc7448_hpc2_power_off();
297 * Called very early, device-tree isn't unflattened
299 static int __init
mpc7448_hpc2_probe(void)
301 unsigned long root
= of_get_flat_dt_root();
303 if (!of_flat_dt_is_compatible(root
, "mpc74xx"))
308 static int mpc7448_machine_check_exception(struct pt_regs
*regs
)
310 extern void tsi108_clear_pci_cfg_error(void);
311 const struct exception_table_entry
*entry
;
313 /* Are we prepared to handle this fault */
314 if ((entry
= search_exception_tables(regs
->nip
)) != NULL
) {
315 tsi108_clear_pci_cfg_error();
317 regs
->nip
= entry
->fixup
;
323 define_machine(mpc7448_hpc2
){
324 .name
= "MPC7448 HPC2",
325 .probe
= mpc7448_hpc2_probe
,
326 .setup_arch
= mpc7448_hpc2_setup_arch
,
327 .init_IRQ
= mpc7448_hpc2_init_IRQ
,
328 .show_cpuinfo
= mpc7448_hpc2_show_cpuinfo
,
329 .get_irq
= mpic_get_irq
,
330 .pcibios_fixup
= mpc7448_hpc2_pcibios_fixup
,
331 .restart
= mpc7448_hpc2_restart
,
332 .calibrate_decr
= generic_calibrate_decr
,
333 .machine_check_exception
= mpc7448_machine_check_exception
,
334 .progress
= udbg_progress
,