John Tyner wrote:
> Here is a patch to setup the serial ports early. It works fine on our
> walnut boards.
>
> --- arch/ppc/platforms/walnut.c.orig Thu Apr 11 12:55:55 2002
> +++ arch/ppc/platforms/walnut.c Thu Apr 11 12:58:35 2002
> @@ -31,6 +31,7 @@
> #include <linux/blk.h>
> #include <linux/pci.h>
> #include <linux/rtc.h>
> +#include <linux/serial.h>
>
> #include <asm/system.h>
> #include <asm/pci-bridge.h>
> @@ -247,6 +248,11 @@
> void __init
> board_init(void)
> {
> + struct serial_struct serial_req;
> + bd_t *bip = (bd_t *) __res;
> + u32 chrcr;
> + int div;
> + ulong bb;
> #ifdef CONFIG_PPC_RTC
> ppc_md.time_init = todc_time_init;
> ppc_md.set_rtc_time = todc_set_rtc_time;
> @@ -254,4 +260,40 @@
> ppc_md.nvram_read_val = todc_direct_read_val;
> ppc_md.nvram_write_val = todc_direct_write_val;
> #endif
> + chrcr = mfdcr(DCRN_CHCR0);
> + div = ((chrcr&0x3e)>>1)+1;
> + div *= 16;
> + bb = bip->bi_intfreq/div;
> +
> + if( !(chrcr & CHR0_U0EC) ){
> + memset(&serial_req, 0, sizeof(serial_req));
> + serial_req.line = 0;
> + serial_req.baud_base = bb;
> + serial_req.port = 0;
> + serial_req.irq = UART0_INT;
> + serial_req.flags = ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST;
> + serial_req.io_type = SERIAL_IO_MEM;
> + serial_req.iomem_base = (u8 *)UART0_IO_BASE;
> + serial_req.iomem_reg_shift = 0;
> +
> + if (early_serial_setup(&serial_req) != 0) {
> + printk("Early serial init of port 0 failed\n");
> + }
> + }
> +
> + if( !(chrcr & CHR0_U1EC) ){
> + memset(&serial_req, 0, sizeof(serial_req));
> + serial_req.line = 1;
> + serial_req.baud_base = bb;
> + serial_req.port = 1;
> + serial_req.irq = UART1_INT;
> + serial_req.flags = ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST;
> + serial_req.io_type = SERIAL_IO_MEM;
> + serial_req.iomem_base = (u8 *)UART1_IO_BASE;
> + serial_req.iomem_reg_shift = 0;
> +
> + if (early_serial_setup(&serial_req) != 0) {
> + printk("Early serial init of port 1 failed\n");
> + }
> + }
> }
>
>
>
>
>
I thought we all ready had an early boot for walnut?
armin
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