adding 16550 UART to board(mpc5200)
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adding 16550 UART to board(mpc5200)
by 9527
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Hi I am adding an add additional UART controller (XR16L2550) toMPC5200B, the board is similar to lite5200b, so I used the linux BSP of Freescale company provided for lite5200b. Kernel is 2.6.16.Before I add the UART driver(I used driver/serial/8250.c), the kernel boots fine, as soon as loading the UART driver, kernel will hang on "Freeing unused kernel: 100k init".I defined a structrue in arch/ppc/platform/lite5200.c as: static struct plat_serial8250_port serial8250_ports[] = { [0] = { .uartclk = 9600*16,
.iotype = UPIO_MEM, .mapbase = 0xfc000000, .flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP | UPF_SHARE_IRQ,
.irq = MPC52xx_IRQ1, }, [1] = { .uartclk = 9600*16,, .iotype = UPIO_MEM, .mapbase = 0xfc000008,
.flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP | UPF_SHARE_IRQ, .irq = MPC52xx_IRQ1,
}, [2] = { .uartclk = 9600*16,,
.iotype = UPIO_MEM, .mapbase = 0xfc000010, .flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP | UPF_SHARE_IRQ,
.irq = MPC52xx_IRQ2, }, [3] = { .uartclk = 9600*16,, .iotype = UPIO_MEM, .mapbase = 0xfc000018,
.flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP | UPF_SHARE_IRQ, .irq = MPC52xx_IRQ2,
}, [4] = { .uartclk = 9600*16,,
.iotype = UPIO_MEM, .mapbase = 0xfc000020, .flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP | UPF_SHARE_IRQ,
.irq = MPC52xx_IRQ3, },
[5] = { .uartclk = 9600*16,, .iotype = UPIO_MEM, .mapbase = 0xfc000028,
.flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP | UPF_SHARE_IRQ, .irq = MPC52xx_IRQ3,
}, {}, }; static struct platform_device serial8250_device = { .name = "serial8250",
.id = 0, .dev.platform_data = serial8250_ports, };
static int __init add_serial8250_devices(void) { return platform_device_register(&serial8250_device); } arch_initcall(add_serial8250_devices);
The boot message is : FT-Boot 1.2.0 (Sep 17 2008 - 09:16:55) CPU: MPC5200 v2.2, Core v1.4 at 462 MHz
Bus 132 MHz, IPB 132 MHz, PCI 33 MHz Board: FXALM（mpc52xx) I2C: 85 kHz, ready DRAM: 256 MB FLASH: (Bank#1 - 512 kB, Bank#2 - 16 MB) 16.5 MB In: serial
Out: serial Err: serial Net: FEC ETHERNET IDE: Bus 0: OK Device 0: Model: 128MB ATA Flash Disk Firm: ADAA408J Ser#: A161112339F000831558 Type: Hard Disk
Capacity: 122.1 MB = 0.1 GB (250112 x 512) Hit any key to stop autoboot: 0 Using FEC ETHERNET device TFTP from server 192.168.1.40; our IP address is 192.168.1.50
Filename '/tftpboot/uImage'. Load address: 0x200000 Loading: ################################################################# #################################################################
################################################################# ######################################################## done Bytes transferred = 1281939 (138f93 hex)
## Booting image at 00200000 ... Image Name: Linux-2.6.16 Created: 2008-11-19 19:22:59 UTC Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 1281875 Bytes = 1.2 MB
Load Address: 00000000 Entry Point: 00000000 Uncompressing Kernel Image ... OK id mach(): done MMU:enter MMU:hw init MMU:mapin MMU:setio
MMU:exit setup_arch: enter setup_arch: bootmem arch: exit bootinfo is find_bootinfo()<5>Linux version 2.6.16 (root@...) (gcc version 3.4.3) #50 Thu No8
Built 1 zonelists Kernel command line: console=ttyPSC0,9600 root=/dev/nfs rw nfsroot=192.168.1.40:/home/hyz/ltib-mpc5200-20070201 PID hash table entries: 2048 (order: 11, 32768 bytes) Console: colour dummy device 80x25
Dentry cache hash table entries: 65536 (order: 6, 262144 bytes) Inode-cache hash table entries: 32768 (order: 5, 131072 bytes) Memory: 256896k available (1968k kernel code, 664k data, 100k init, 0k highmem)
Mount-cache hash table entries: 512 NET: Registered protocol family 16 DMA: MPC52xx BestComm driver MPC52xx BestComm inited SCSI subsystem initialized
Installing knfsd (copyright (C) 1996 okir@...). JFFS2 version 2.2. (NAND) (C) 2001-2003 Red Hat, Inc.
io scheduler noop registered io scheduler anticipatory registered (default) io scheduler deadline registered io scheduler cfq registered Serial: 8250/16550 driver $Revision: 1.90 $ 6 ports, IRQ sharing enabled
serial8250.0: ttyS0 at MMIO 0xfc000000 (irq = 6) is a 16550A serial8250.0: ttyS1 at MMIO 0xfc000008 (irq = 6) is a 16550A
serial8250.0: ttyS2 at MMIO 0xfc000010 (irq = 7) is a 16550A serial8250.0: ttyS3 at MMIO 0xfc000018 (irq = 7) is a 16550A
serial8250.0: ttyS4 at MMIO 0xfc000020 (irq = 8) is a 16550A
serial8250.0: ttyS5 at MMIO 0xfc000028 (irq = 8) is a 16550A Serial: MPC52xx PSC driver ttyPSC0 at MMIO 0xf0002000 (irq = 40) is a MPC52xx PSC
ttyPSC1 at MMIO 0xf0002200 (irq = 41) is a MPC52xx PSC ttyPSC2 at MMIO 0xf0002400 (irq = 42) is a MPC52xx PSC ttyPSC3 at MMIO 0xf0002600 (irq = 50) is a MPC52xx PSC ttyPSC4 at MMIO 0xf0002800 (irq = 51) is a MPC52xx PSC
ttyPSC5 at MMIO 0xf0002c00 (irq = 43) is a MPC52xx PSC RAMDISK driver initialized: 16 RAM disks of 4096K size 1024 blocksize Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2 ide: Assuming 50MHz system bus speed for PIO modes; override with idebus=xx
ide: MPC52xx IDE/ATA driver eth0: Phy @ 0x0, type LXT971 (0x001378e2) hda: 128MB ATA Flash Disk, ATA DISK drive ide0 at 0xf0003a60-0xf0003a67,0xf0003a5c on irq 46 mpc52xx-ide: Setup successful for ide0 (mem=f0003a00-f0003aff irq=46)
hda: max request size: 128KiB hda: 250112 sectors (128 MB) w/1KiB Cache, CHS=977/8/32 hda: cache flushes not supported hda: hda1 flash chip on the Lite5200/Lite5200B: Found 1 x16 devices at 0x0 in 8-bit bank
Intel/Sharp Extended Query Table at 0x0031 Using buffer write method cfi_cmdset_0001: Erase suspend on write enabled Creating 1 MTD partitions on "flash chip on the Lite5200/Lite5200B":
0x00000000-0x01000000 : "Filesystem" mice: PS/2 mouse device common for all mice NET: Registered protocol family 2 IP route cache hash table entries: 4096 (order: 2, 16384 bytes)
TCP established hash table entries: 16384 (order: 4, 65536 bytes) TCP bind hash table entries: 16384 (order: 4, 65536 bytes) TCP: Hash tables configured (established 16384 bind 16384) TCP reno registered
TCP bic registered NET: Registered protocol family 1 NET: Registered protocol family 17 eth0: config: auto-negotiation on, 100HDX, 10HDX. IP-Config: Complete:
host=192.168.1.50, domain=, nis-domain=(none), bootserver=192.168.1.40, rootserver=192.168.1.40, rootpath=
Looking up port of RPC 100003/2 on 192.168.1.40 Looking up port of RPC 100005/1 on 192.168.1.40
VFS: Mounted root (nfs filesystem). Freeing unused kernel memory: 100k init Stoping here now~~~, I can't find reason and what I should do?
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