I have just completed a U-BOOT port of the IBM 440GX to my
board.However, I have yet to find a linux distro that supports the on
board RGMII bridge & the (gigabit) ethernet ports. Does anyone know
of a lcomplete linux port (including gigabits) for the IBM 440GX
Note: the MAC address passing from U-Boot and proper calibrating of
decrementer don't work. Please, apply the attached patch.
--
Pavel Bartusek
pba@sysgo.com
Software Engineering
SYSGO Real-Time Solutions AG | Embedded and Real-Time Software
Lise-Meitner-Str.15
89081 Ulm, Germany
Voice: +49-731-9533-1295
FAX: +49-731-94683-10
www.sysgo.com | www.elinos.com | www.osek.de
--- linux-2.5-ocp/include/asm-ppc/ibm44x.h 2004-05-27 11:05:13.000000000 +0200
+++ linux-2.5-ocp/include/asm-ppc/ibm44x.h 2004-06-05 17:59:35.000000000 +0200
@@ -62,6 +62,12 @@
* SPRN definitions
*/
#define SPRN_CPC0_GPIO 0xe5/BEARLRL
+#ifdef CONFIG_440GX
+#define SPRN_MCSRR0 0x23a
+#define SPRN_MCSRR1 0x23b
+#define SPRN_MCSR 0x23c
+#define SPRN_CCR1 0x378
+#endif
/*
* DCRN definitions
--- linux-2.5-ocp/arch/ppc/platforms/4xx/ocotea.c.ori 2004-05-27 11:02:13.000000000 +0200
+++ linux-2.5-ocp/arch/ppc/platforms/4xx/ocotea.c 2004-06-05 17:43:20.000000000 +0200
@@ -63,8 +63,16 @@ static void __init
ocotea_calibrate_decr(void)
{
unsigned int freq;
+ struct ibm44x_clocks clocks;
- freq = OCOTEA_SYSCLK;
+ if (mfspr(SPRN_CCR1) & 0x00000080) {
+ /* CPU timers increment at TMR_CLK pin frequency */
+ freq = OCOTEA_SYSCLK;
+ } else {
+ /* CPU timers increment at CPU clock frequency */
+ ibm440gx_get_clocks(&clocks, 33333333, 6 * 1843200);
+ freq = clocks.cpu;
+ }
tb_ticks_per_jiffy = freq / HZ;
tb_to_us = mulhwu_scale_factor(freq, 1000000);
@@ -240,8 +248,6 @@ ocotea_early_serial_map(const struct ibm
static void __init
ocotea_setup_arch(void)
{
- unsigned char *addr;
- unsigned long long mac64;
struct ocp_def *def;
struct ocp_func_emac_data *emacdata;
int i;
@@ -259,6 +265,10 @@ ocotea_setup_arch(void)
* the phy_map/phy_mode.
*/
/* Set phy_map, phy_mode, and mac_addr for each EMAC */
+#ifndef CONFIG_U_BOOT
+ unsigned char *addr;
+ unsigned long long mac64;
+
addr = ioremap64(OCOTEA_MAC_BASE, OCOTEA_MAC_SIZE);
for (i=0; i<4; i++) {
mac64 = simple_strtoull(addr+OCOTEA_MAC_OFFSET*i, 0, 16);
@@ -275,7 +285,34 @@ ocotea_setup_arch(void)
memcpy(emacdata->mac_addr, (char *)&mac64+2, 6);
}
iounmap(addr);
-
+#else
+ for (i=0; i<4; i++) {
+ def = ocp_get_one_device(OCP_VENDOR_IBM, OCP_FUNC_EMAC, i);
+ emacdata = def->additions;
+ if (i < 2) {
+ emacdata->phy_map = 0x00000001; /* Skip 0x00 */
+ emacdata->phy_mode = PHY_MODE_SMII;
+ }
+ else {
+ emacdata->phy_map = 0x0000ffff; /* Skip 0x00-0x0f */
+ emacdata->phy_mode = PHY_MODE_RGMII;
+ }
+ switch (i) {
+ case 0:
+ memcpy(emacdata->mac_addr, bd->bi_enetaddr, 6);
+ break;
+ case 1:
+ memcpy(emacdata->mac_addr, bd->bi_enet1addr, 6);
+ break;
+ case 2:
+ memcpy(emacdata->mac_addr, bd->bi_enet2addr, 6);
+ break;
+ case 3:
+ memcpy(emacdata->mac_addr, bd->bi_enet3addr, 6);
+ break;
+ }
+ }
+#endif
ibm440gx_tah_enable();
#if !defined(CONFIG_BDI_SWITCH)
Don Palmer
Pavel Bartusek