Hi Laurent and all,
Because many people have sent private mail to me to ask about using
UART1 on DM355. I'd like to re-send the solution to the mailing list so that in
the future, some one will easily find this.
Reagards,
Viet Hoang.
In order to use UART1 on DM355:
1. Add some code to function board_init() (
arch/arm/mach-davinci/board-dm355-evm.c) as below:
static void board_init(void)
{
volatile int *ptr_pgmgt,*ptr_ier; //Added for UART1
board_setup_psc(DAVINCI_GPSC_ARMDOMAIN, DAVINCI_LPSC_VPSSMSTR, 1);
board_setup_psc(DAVINCI_GPSC_ARMDOMAIN, DAVINCI_LPSC_VPSSSLV, 1);
board_setup_psc(DAVINCI_GPSC_ARMDOMAIN, DAVINCI_LPSC_TPCC, 1);
board_setup_psc(DAVINCI_GPSC_ARMDOMAIN, DAVINCI_LPSC_TPTC0, 1);
board_setup_psc(DAVINCI_GPSC_ARMDOMAIN, DAVINCI_LPSC_TPTC1, 1);
board_setup_psc(DAVINCI_GPSC_ARMDOMAIN, DAVINCI_LPSC_GPIO, 1);
board_setup_psc(DAVINCI_GPSC_ARMDOMAIN, DAVINCI_LPSC_McBSP1, 1);
board_setup_psc(DAVINCI_GPSC_ARMDOMAIN, DAVINCI_LPSC_SPI, 1);
// Turn on WatchDog timer LPSC. Needed for RESET to work
board_setup_psc(DAVINCI_GPSC_ARMDOMAIN, DAVINCI_LPSC_TIMER2, 1);
// Added for UART1
board_setup_psc(DAVINCI_GPSC_ARMDOMAIN, DAVINCI_LPSC_UART1, 1);
davinci_serial_init(&serial_device);
davinci_writel(0x56837210, DAVINCI_VPSS_REGS_BASE + 0x810);
davinci_writel(0x7b3c0004, DAVINCI_VPSS_REGS_BASE + 0x814);
//Enable UART1
ptr_pgmgt = (volatile int *)IO_ADDRESS(DAVINCI_UART1_BASE+0x30) ;
ptr_ier = (volatile int *)IO_ADDRESS(DAVINCI_UART1_BASE+0x4);
*ptr_pgmgt = 0x0; //reset tx and rx
*ptr_ier = 0x0; //disable int
int del = 0;
for(del = 0; del < 100000 ; del++) // For delay
*ptr_pgmgt =0x6001;
// Initialize the clock configurations
davinci_clk_init();
//End UART1
}2. Rebuild the kernel, then you can use /dev/tts/0 or /dev/tts/1 for UART0 /
UART1; Or you can use mknod to create /dev/ttyS1 for your UART1.
############################
--- On Tue, 16/9/08, Laurent Meyer <[EMAIL PROTECTED]> wrote:
From: Laurent Meyer <[EMAIL PROTECTED]>
Subject: uart1 on dm355
To: [EMAIL PROTECTED]
Date: Tuesday, 16 September, 2008, 10:57 PM
Hi,
I saw on the mailling list that you had problems using uart1 and uart2 on
dm355, i run in the same problem as you, did you solve your problem ?
Thanks.
--
Laurent MEYER.
Resp projets Borea SAS
Tél: +331 75 43 78 43
Email: [EMAIL PROTECTED]
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