mpc83xx: Add support for the MPC8349E-mITX
PREREQUISITE PATCHES:
* This patch can only be applied after the following patches have been applied:
1) DNX#2006090742000024 "Add support for multiple I2C buses"
2) DNX#2006090742000033 "Multi-bus I2C implementation of MPC834x"
3) DNX#2006091242000041 "Additional MPC8349 support for multibus i2c"
4) DNX#2006091242000078 "Add support for variable flash memory sizes on 83xx systems"
5) DNX#2006091242000069 "Add support for Errata DDR6 on MPC 834x systems"
CHANGELOG:
* Add support for the Freescale MPC8349E-mITX reference design platform.
The second TSEC (Vitesse 7385 switch) is not supported at this time.
Signed-off-by: Timur Tabi <timur@freescale.com>
diff --git a/cpu/mpc83xx/cpu.c b/cpu/mpc83xx/cpu.c
index 8d543d5..4e82a8b 100644
--- a/cpu/mpc83xx/cpu.c
+++ b/cpu/mpc83xx/cpu.c
@@ -69,9 +69,72 @@
}
+/**
+ * Program a UPM with the code supplied in the table.
+ *
+ * The 'dummy' variable is used to increment the MAD. 'dummy' is
+ * supposed to be a pointer to the memory of the device being
+ * programmed by the UPM. The data in the MDR is written into
+ * memory and the MAD is incremented every time there's a read
+ * from 'dummy'. Unfortunately, the current prototype for this
+ * function doesn't allow for passing the address of this
+ * device, and changing the prototype will break a number lots
+ * of other code, so we need to use a round-about way of finding
+ * the value for 'dummy'.
+ *
+ * The value can be extracted from the base address bits of the
+ * Base Register (BR) associated with the specific UPM. To find
+ * that BR, we need to scan all 8 BRs until we find the one that
+ * has its MSEL bits matching the UPM we want. Once we know the
+ * right BR, we can extract the base address bits from it.
+ *
+ * The MxMR and the BR and OR of the chosen bank should all be
+ * configured before calling this function.
+ *
+ * Parameters:
+ * upm: 0=UPMA, 1=UPMB, 2=UPMC
+ * table: Pointer to an array of values to program
+ * size: Number of elements in the array. Must be 64 or less.
+*/
void upmconfig (uint upm, uint *table, uint size)
{
- hang(); /* FIXME: upconfig() needed? */
+#if defined(CONFIG_MPC834X)
+ volatile immap_t *immap = (immap_t *) CFG_IMMRBAR;
+ volatile lbus83xx_t *lbus = &immap->lbus;
+ volatile uchar *dummy = NULL;
+ const u32 msel = (upm + 4) << BR_MSEL_SHIFT; /* What the MSEL field in BRn should be */
+ volatile u32 *mxmr = &lbus->mamr + upm; /* Pointer to mamr, mbmr, or mcmr */
+ uint i;
+
+ /* Scan all the banks to determine the base address of the device */
+ for (i = 0; i < 8; i++) {
+ if ((lbus->bank[i].br & BR_MSEL) == msel) {
+ dummy = (uchar *) (lbus->bank[i].br & BR_BA);
+ break;
+ }
+ }
+
+ if (!dummy) {
+ printf("Error: %s() could not find matching BR\n", __FUNCTION__);
+ hang();
+ }
+
+ /* Set the OP field in the MxMR to "write" and the MAD field to 000000 */
+ *mxmr = (*mxmr & 0xCFFFFFC0) | 0x10000000;
+
+ for (i = 0; i < size; i++) {
+ lbus->mdr = table[i];
+ __asm__ __volatile__ ("sync");
+ *dummy; /* Write the value to memory and increment MAD */
+ __asm__ __volatile__ ("sync");
+ }
+
+ /* Set the OP field in the MxMR to "normal" and the MAD field to 000000 */
+ *mxmr &= 0xCFFFFFC0;
+#else
+ printf("Error: %s() not defined for this configuration.\n", __FUNCTION__);
+ hang();
+#endif
}
@@ -150,9 +213,21 @@
#if defined(CONFIG_WATCHDOG)
void watchdog_reset (void)
{
- hang(); /* FIXME: implement watchdog_reset()? */
+#ifdef CONFIG_MPC834X
+ int re_enable = disable_interrupts();
+
+ /* Reset the 83xx watchdog */
+ volatile immap_t *immr = (immap_t *) CFG_IMMRBAR;
+ immr->wdt.swsrr = 0x556c;
+ immr->wdt.swsrr = 0xaa39;
+
+ if (re_enable)
+ enable_interrupts ();
+#else
+ hang();
+#endif
}
-#endif /* CONFIG_WATCHDOG */
+#endif
#if defined(CONFIG_OF_FLAT_TREE)
void
diff --git a/cpu/mpc83xx/cpu_init.c b/cpu/mpc83xx/cpu_init.c
index 6ed0992..999fe71 100644
--- a/cpu/mpc83xx/cpu_init.c
+++ b/cpu/mpc83xx/cpu_init.c
@@ -46,6 +46,37 @@
/* Clear initial global data */
memset ((void *) gd, 0, sizeof (gd_t));
+ /* system performance tweaking */
+
+#ifdef CFG_ACR_PIPE_DEP
+ /* Arbiter pipeline depth */
+ im->arbiter.acr = (im->arbiter.acr & ~ACR_PIPE_DEP) | (3 << ACR_PIPE_DEP_SHIFT);
+#endif
+
+#ifdef CFG_SPCR_TSEC1EP
+ /* TSEC1 Emergency priority */
+ im->sysconf.spcr = (im->sysconf.spcr & ~SPCR_TSEC1EP) | (3 << SPCR_TSEC1EP_SHIFT);
+#endif
+
+#ifdef CFG_SPCR_TSEC2EP
+ /* TSEC2 Emergency priority */
+ im->sysconf.spcr = (im->sysconf.spcr & ~SPCR_TSEC2EP) | (3 << SPCR_TSEC2EP_SHIFT);
+#endif
+
+#ifdef CFG_SCCR_TSEC1CM
+ /* TSEC1 clock mode */
+ im->clk.sccr = (im->clk.sccr & ~SCCR_TSEC1CM) | (1 << SCCR_TSEC1CM_SHIFT);
+#endif
+#ifdef CFG_SCCR_TSEC2CM
+ /* TSEC2 & I2C1 clock mode */
+ im->clk.sccr = (im->clk.sccr & ~SCCR_TSEC2CM) | (1 << SCCR_TSEC2CM_SHIFT);
+#endif
+
+#ifdef CFG_ACR_RPTCNT
+ /* Arbiter repeat count */
+ im->arbiter.acr = ((im->arbiter.acr & ~(ACR_RPTCNT)) | (3 << ACR_RPTCNT_SHIFT));
+#endif
+
/* RSR - Reset Status Register - clear all status (4.6.1.3) */
gd->reset_status = im->reset.rsr;
im->reset.rsr = ~(RSR_RES);
diff --git a/cpu/mpc83xx/spd_sdram.c b/cpu/mpc83xx/spd_sdram.c
index 8ee4234..3dfde8a 100644
--- a/cpu/mpc83xx/spd_sdram.c
+++ b/cpu/mpc83xx/spd_sdram.c
@@ -133,6 +133,26 @@
/* Read SPD parameters with I2C */
+#ifdef CFG_83XX_DDR_USES_CS0
+ ddr->csbnds[0].csbnds = (banksize(spd.row_dens) >> 24) - 1;
+ ddr->cs_config[0] = ( 1 << 31
+ | (spd.nrow_addr - 12) << 8
+ | (spd.ncol_addr - 8) );
+ debug("\n");
+ debug("cs0_bnds = 0x%08x\n",ddr->csbnds[0].csbnds);
+ debug("cs0_config = 0x%08x\n",ddr->cs_config[0]);
+
+ if (spd.nrows == 2) {
+ ddr->csbnds[1].csbnds = ( (banksize(spd.row_dens) >> 8)
+ | ((banksize(spd.row_dens) >> 23) - 1) );
+ ddr->cs_config[1] = ( 1<<31
+ | (spd.nrow_addr-12) << 8
+ | (spd.ncol_addr-8) );
+ debug("cs1_bnds = 0x%08x\n",ddr->csbnds[1].csbnds);
+ debug("cs1_config = 0x%08x\n",ddr->cs_config[1]);
+ }
+
+#else
CFG_READ_SPD(SPD_EEPROM_ADDRESS, 0, 1, (uchar *) & spd, sizeof (spd));
#ifdef SPD_DEBUG
spd_debug(&spd);
@@ -180,6 +200,7 @@
debug("cs3_bnds = 0x%08x\n",ddr->csbnds[3].csbnds);
debug("cs3_config = 0x%08x\n",ddr->cs_config[3]);
}
+#endif
if (spd.mem_type != 0x07) {
puts("No DDR module found!\n");
