Hi all,
I would like to take up the question about configuration again.
I believe that the situation is the same for a lot of people
out here: Get Linux working on some kind of new 8xx hardware.
Today we need to modify and add #ifdefs to different files.
I like the idea of some kind of central board specific file.
I'm relly happy the day I just add my board_name.h to mpc8xx.h
and everything works...or something else.
I suggested the following code to Dan Malek a while ago, and he didn't
like the idea with a lot of inline code in one .h file, right Dan?
Anyone else out there with another idea how to solve this problem?
Or is it a problem..?
Cheers /
Magnus
Code from my ads.h - board specific file for my ADS board.
/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
/* Macros and values needed by the ethernet driver - enet.c */
#include <linux/types.h>
#include <asm/residual.h>
#include <asm/8xx_immap.h>
#define PA_ENET_RXD ((ushort)0x0001)
#define PA_ENET_TXD ((ushort)0x0002)
#define PA_ENET_TCLK ((ushort)0x0100)
#define PA_ENET_RCLK ((ushort)0x0200)
#define PB_ENET_TENA ((ushort)0x00001000)
#define PC_ENET_CLSN ((ushort)0x0010)
#define PC_ENET_RENA ((ushort)0x0020)
#define SICR_ENET_MASK ((uint)0x000000ff)
#define SICR_ENET_CLKRT ((uint)0x0000002c) // T=CLK1, R=CLK2
#define PC_ENET_ETHLOOP ((ushort)0x0800)
#define PC_ENET_TPFLDL ((ushort)0x0400)
#define PC_ENET_TPSQEL ((ushort)0x0200)
/* tell the ethernet driver we want to use SCC1 */
extern __inline__ int enet_get_scc(unsigned int enet_nr)
{
switch(enet_nr) {
case 0: return 1; /* allow only one ethernet, use SCC1 */
default: return 0;
}
}
/* configure ethernet pins, clocks and the ethernet address */
extern __inline__ void enet_configure(unsigned int enet_nr,
immap_t *immap, unsigned char *eap)
{
bd_t *bd = (bd_t *)res;
int i;
/* Configure port A pins for Txd and Rxd.
*/
immap->im_ioport.iop_papar |= (PA_ENET_RXD | PA_ENET_TXD);
immap->im_ioport.iop_padir &= ~(PA_ENET_RXD | PA_ENET_TXD);
immap->im_ioport.iop_paodr &= ~PA_ENET_TXD;
/* Configure port C pins to enable CLSN and RENA.
*/
immap->im_ioport.iop_pcpar &= ~(PC_ENET_CLSN | PC_ENET_RENA);
immap->im_ioport.iop_pcdir &= ~(PC_ENET_CLSN | PC_ENET_RENA);
immap->im_ioport.iop_pcso |= (PC_ENET_CLSN | PC_ENET_RENA);
/* Configure port A for TCLK and RCLK.
*/
immap->im_ioport.iop_papar |= (PA_ENET_TCLK | PA_ENET_RCLK);
immap->im_ioport.iop_padir &= ~(PA_ENET_TCLK | PA_ENET_RCLK);
/* Port C is used to control the PHY, 68160.
*/
immap->im_ioport.iop_pcdir |=
(PC_ENET_ETHLOOP | PC_ENET_TPFLDL | PC_ENET_TPSQEL);
immap->im_ioport.iop_pcdat |= PC_ENET_TPFLDL;
immap->im_ioport.iop_pcdat &= ~(PC_ENET_ETHLOOP | PC_ENET_TPSQEL);
/* Configure Serial Interface clock routing.
* First, clear all SCC bits to zero, then set the ones we want.
*/
immap->im_cpm.cp_sicr &= ~SICR_ENET_MASK;
immap->im_cpm.cp_sicr |= SICR_ENET_CLKRT;
/* Set ethernet address
*/
for (i=0; i<6; i++)
eap[i] = bd->bi_enetaddr[i];
}
/* enable the ethernet transmitter */
extern __inline__ void enet_tena(unsigned int enet_nr, immap_t *immap)
{
immap->im_cpm.cp_pbpar |= PB_ENET_TENA;
immap->im_cpm.cp_pbdir |= PB_ENET_TENA;
*((uint *)BCSR1) &= ~BCSR1_ETHEN;
}
/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
/* Should there be a SMC at /dev/ttyS<uart_nr> ? */
extern __inline__ int uart_get_smc(unsigned int uart_nr)
{
switch(uart_nr) {
case 0: return 1; /* the first serial port is at SMC1 */
case 2: return 2;
default: return 0;
}
}
/* Or should it be a SCC ? */
extern __inline__ int uart_get_scc(unsigned int uart_nr)
{
switch(uart_nr) {
case 1: return 3;
default: return 0;
}
// return 0; /* we don't want any SCCs at all */
}
/* And what clock should it use ? */
/* Get clock source: 0 -> 3 = BRG1 -> BRG4, 4 -> 7 = CLK1 -> CLK4 */
extern __inline__ int uart_get_clksrc(unsigned int uart_nr)
{
return uart_nr + 1;
}
extern __inline__ int uart_console_get_smc(void)
{
return 1; /* console at SMC1 */
}
/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
