2010-12-23 23:25:20 Question:BF561 & ST16C2552 ?
HappyBlackfin Blackfin (CHINA)
Message: 96974
Processor: BF561 0.5
ucLinux Release:Linux version 2.6.28.10-ADI-2009R1 (root@LinuxS1) (gcc version 4.1.2(ADI SVN))#79 SMP
Hardware resource:
Address map:
BF561 A2 to ST16C2552 A0
BF561 A3 to ST16C2552 A1
BF561 A4 to ST16C2552 A2
BF561 A5 to ST16C2552 CHSEL (such as A3)
BF561 #AMS3 to ST16C2552 #CS
Interrupt map:
BF561 PF12 to ST16C2552 INTB
BF561 PF11 to ST16C2552 INTA
Source code:
\mach=bf561\boards\ezkit.c we add:
#if defined(CONFIG_SERIAL_8250) || defined(CONFIG_SERIAL_8250_MODULE)
#include <linux/serial_8250.h>
#include <linux/serial.h>
static struct plat_serial8250_port serial8250_platform_data [] = {
{ .membase = (void *)0x2C000000,
.mapbase = 0x2C000000,
.irq = IRQ_PF12,
.flags = UPF_BOOT_AUTOCONF | UART_CONFIG_TYPE,
.iotype = UPIO_MEM,
.regshift = 2,
.uartclk = 14745000,
}, {
.membase = (void *)0x2C000008,
.mapbase = 0x2C000008,
.irq = IRQ_PF11,
.flags = UPF_BOOT_AUTOCONF | UART_CONFIG_TYPE,
.iotype = UPIO_MEM,
.regshift = 2,
.uartclk = 14745000,
}, {
}
};
static struct platform_device serial8250_device = {
.id = PLAT8250_DEV_PLATFORM,
.name = "serial8250",
.dev = {
.platform_data = serial8250_platform_data,
},
};
#endif
.................
static struct platform_device *ezkit_devices[] __initdata = {
........
#if defined(CONFIG_SERIAL_8250) || defined(CONFIG_SERIAL_8250_MODULE)
&serial8250_device,
#endif
.......
}
Boot info：
Serial: 8250/16550 driver2 ports, IRQ sharing disabled
serial8250.0: ttyS0 at MMIO 0x2c000000 (irq = 85) is a 16550A
Serial: Blackfin serial driver
bfin-uart.1: ttyBF0 at MMIO 0xffc00400 (irq = 35) is a BFIN-UART
Test:
root:/> echo "hellolinux for blackfin" > /dev/ttyS0
Then can see signal on ST16C2552 UART B TX pin.
Question:
Why only one UART register successful?
How to do?
Thanks!