2 * Generic setup routines for Broadcom MIPS boards
4 * Copyright 2004, Broadcom Corporation
7 * THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
8 * KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
9 * SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
10 * FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
15 #include <linux/config.h>
16 #include <linux/init.h>
17 #include <linux/kernel.h>
18 #include <linux/serialP.h>
19 #include <linux/ide.h>
20 #include <asm/bootinfo.h>
22 #include <asm/reboot.h>
24 #ifdef CONFIG_MTD_PARTITIONS
25 #include <linux/mtd/mtd.h>
26 #include <linux/mtd/partitions.h>
36 extern void bcm947xx_time_init(void);
37 extern void bcm947xx_timer_setup(struct irqaction *irq);
39 #ifdef CONFIG_REMOTE_DEBUG
40 extern void set_debug_traps(void);
41 extern void rs_kgdb_hook(struct serial_state *);
42 extern void breakpoint(void);
45 #if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE)
46 extern struct ide_ops std_ide_ops;
49 /* Global SB handle */
50 void *bcm947xx_sbh = NULL;
51 spinlock_t bcm947xx_sbh_lock = SPIN_LOCK_UNLOCKED;
52 EXPORT_SYMBOL(bcm947xx_sbh);
53 EXPORT_SYMBOL(bcm947xx_sbh_lock);
56 #define sbh bcm947xx_sbh
57 #define sbh_lock bcm947xx_sbh_lock
59 /* Kernel command line */
60 char arcs_cmdline[CL_SIZE] __initdata = CONFIG_CMDLINE;
63 bcm947xx_machine_restart(char *command)
65 printk("Please stand by while rebooting the system...\n");
67 /* Set the watchdog timer to reset immediately */
74 bcm947xx_machine_halt(void)
76 printk("System halted\n");
78 /* Disable interrupts and watchdog and spin forever */
86 static struct serial_struct rs = {
88 flags: ASYNC_BOOT_AUTOCONF,
89 io_type: SERIAL_IO_MEM,
93 serial_add(void *regs, uint irq, uint baud_base, uint reg_shift)
97 rs.baud_base = baud_base / 16;
98 rs.iomem_reg_shift = reg_shift;
100 early_serial_setup(&rs);
106 serial_setup(void *sbh)
108 sb_serial_init(sbh, serial_add);
110 #ifdef CONFIG_REMOTE_DEBUG
111 /* Use the last port for kernel debugging */
117 #endif /* CONFIG_SERIAL */
124 /* Get global SB handle */
127 /* Initialize clocks and interrupts */
131 /* Initialize UARTs */
135 #if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE)
136 ide_ops = &std_ide_ops;
139 /* Override default command line arguments */
140 value = nvram_get("kernel_args");
141 if (value && strlen(value) && strncmp(value, "empty", 5))
142 strncpy(arcs_cmdline, value, sizeof(arcs_cmdline));
146 _machine_restart = bcm947xx_machine_restart;
147 _machine_halt = bcm947xx_machine_halt;
148 _machine_power_off = bcm947xx_machine_halt;
150 board_time_init = bcm947xx_time_init;
151 board_timer_setup = bcm947xx_timer_setup;
155 get_system_type(void)
157 return "Broadcom BCM947XX";
165 #ifdef CONFIG_MTD_PARTITIONS
167 static struct mtd_partition bcm947xx_parts[] = {
168 { name: "pmon", offset: 0, size: 0, mask_flags: MTD_WRITEABLE, },
169 { name: "linux", offset: 0, size: 0, },
170 { name: "rootfs", offset: 0, size: 0, },
171 { name: "nvram", offset: 0, size: 0, },
172 { name: "OpenWrt", offset: 0, size: 0, },
177 find_root(struct mtd_info *mtd, size_t size, struct mtd_partition *part)
179 struct trx_header *trx;
180 unsigned char buf[512];
184 trx = (struct trx_header *) buf;
186 for (off = (256*1024); off < size; off += mtd->erasesize) {
187 memset(buf, 0xe5, sizeof(buf));
192 if (MTD_READ(mtd, off, sizeof(buf), &len, buf) ||
196 /* found a TRX header */
197 if (le32_to_cpu(trx->magic) == TRX_MAGIC) {
198 part->offset = le32_to_cpu(trx->offsets[2]) ? :
199 le32_to_cpu(trx->offsets[1]);
200 part->size = le32_to_cpu(trx->len);
202 part->size -= part->offset;
210 "%s: Couldn't find root filesystem\n",
218 struct mtd_partition * __init
219 init_mtd_partitions(struct mtd_info *mtd, size_t size)
223 bcm947xx_parts[0].offset=0;
224 bcm947xx_parts[0].size=256*1024;
227 bcm947xx_parts[3].offset = size - ROUNDUP(NVRAM_SPACE, mtd->erasesize);
228 bcm947xx_parts[3].size = size - bcm947xx_parts[3].offset;
230 /* Size linux (kernel and rootfs) */
231 bcm947xx_parts[1].offset = bcm947xx_parts[0].size;
232 bcm947xx_parts[1].size = bcm947xx_parts[3].offset - bcm947xx_parts[1].offset;
234 /* Find and size rootfs */
235 if (find_root(mtd,size,&bcm947xx_parts[2])==0) {
237 bcm947xx_parts[2].size = bcm947xx_parts[3].offset - bcm947xx_parts[2].offset;
238 bcm947xx_parts[4].name = NULL;
241 /* calculate leftover flash, and assign it to the jffs2 partition */
242 bcm947xx_parts[4].offset = bcm947xx_parts[2].offset + bcm947xx_parts[2].size;
243 bcm947xx_parts[4].offset = ROUNDUP(bcm947xx_parts[4].offset, mtd->erasesize);
244 bcm947xx_parts[4].size = bcm947xx_parts[3].offset - bcm947xx_parts[4].offset;
247 return bcm947xx_parts;
250 EXPORT_SYMBOL(init_mtd_partitions);