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>

3 files changed, 130 insertions, 3 deletions

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 @@ int checkcpu(void)
 }
 
 
+/**
+ * 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 @@ unsigned long get_tbclk(void)
 #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 @@ void cpu_init_f (volatile immap_t * im)
 	/* 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 @@ long int spd_sdram()
 
 
         /* 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 @@ long int spd_sdram()
 		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");