TQM8548: Basic support for the TQM8548 modules

This patch adds basic support for the TQM8548 module from TQ-Components
(http://www.tqc.de/) including DDR2 SDRAM initialisation and support for
eTSEC 3 and 4

Furthermore Flash buffer write has been enabled to speed up output to
the Flash by approx. a factor of 10.

Signed-off-by: Thomas Waehner <thomas.waehner@tqs.de>
Signed-off-by: Wolfgang Grandegger <wg@grandegger.com>

6 files changed, 334 insertions, 33 deletions

diff --git a/MAKEALL b/MAKEALL
index 3cb1d24..8fb1e86 100755
--- a/MAKEALL
+++ b/MAKEALL
@@ -360,6 +360,7 @@ LIST_85xx="		\
 	stxssa		\
 	TQM8540		\
 	TQM8541		\
+	TQM8548		\
 	TQM8555		\
 	TQM8560		\
 "
diff --git a/Makefile b/Makefile
index c0b73e1..894466b 100644
--- a/Makefile
+++ b/Makefile
@@ -2230,6 +2230,7 @@ stxssa_4M_config:	unconfig
 
 TQM8540_config		\
 TQM8541_config		\
+TQM8548_config		\
 TQM8555_config		\
 TQM8560_config:		unconfig
 	@mkdir -p $(obj)include
diff --git a/board/tqc/tqm85xx/sdram.c b/board/tqc/tqm85xx/sdram.c
index e005d84..442ff66 100644
--- a/board/tqc/tqm85xx/sdram.c
+++ b/board/tqc/tqm85xx/sdram.c
@@ -30,16 +30,27 @@
 struct sdram_conf_s {
 	unsigned long size;
 	unsigned long reg;
+#ifdef CONFIG_TQM8548
+	unsigned long refresh;
+#endif /* CONFIG_TQM8548 */
 };
 
 typedef struct sdram_conf_s sdram_conf_t;
 
+#ifdef CONFIG_TQM8548
+sdram_conf_t ddr_cs_conf[] = {
+	{(512 << 20), 0x80044102, 0x0001A000},	/* 512MB, 13x10(4)	*/
+	{(256 << 20), 0x80040102, 0x00014000},	/* 256MB, 13x10(4)	*/
+	{(128 << 20), 0x80040101, 0x0000C000},	/* 128MB, 13x9(4)	*/
+};
+#else /* !CONFIG_TQM8548 */
 sdram_conf_t ddr_cs_conf[] = {
 	{(512 << 20), 0x80000202},	/* 512MB, 14x10(4)	*/
 	{(256 << 20), 0x80000102},	/* 256MB, 13x10(4)	*/
 	{(128 << 20), 0x80000101},	/* 128MB, 13x9(4)	*/
 	{( 64 << 20), 0x80000001},	/*  64MB, 12x9(4)	*/
 };
+#endif /* CONFIG_TQM8548 */
 
 #define	N_DDR_CS_CONF (sizeof(ddr_cs_conf) / sizeof(ddr_cs_conf[0]))
 
@@ -56,8 +67,12 @@ long int sdram_setup (int casl)
 {
 	int i;
 	volatile ccsr_ddr_t *ddr = (void *)(CFG_MPC85xx_DDR_ADDR);
+#ifdef CONFIG_TQM8548
+	volatile ccsr_gur_t *gur = (void *)(CFG_MPC85xx_GUTS_ADDR);
+#else /* !CONFIG_TQM8548 */
 	unsigned long cfg_ddr_timing1;
 	unsigned long cfg_ddr_mode;
+#endif /* CONFIG_TQM8548 */
 
 	/*
 	 * Disable memory controller.
@@ -65,6 +80,122 @@ long int sdram_setup (int casl)
 	ddr->cs0_config = 0;
 	ddr->sdram_cfg = 0;
 
+#ifdef CONFIG_TQM8548
+	ddr->cs0_bnds = (ddr_cs_conf[0].size - 1) >> 24;
+	ddr->cs0_config = ddr_cs_conf[0].reg;
+	ddr->timing_cfg_3 = 0x00010000;
+
+	/* TIMING CFG 1, 533MHz
+	 * PRETOACT: 4 Clocks
+	 * ACTTOPRE: 12 Clocks
+	 * ACTTORW:  4 Clocks
+	 * CASLAT:   4 Clocks
+	 * REFREC:   34 Clocks
+	 * WRREC:    4 Clocks
+	 * ACTTOACT: 3 Clocks
+	 * WRTORD:   2 Clocks
+	 */
+	ddr->timing_cfg_1 = 0x4C47A432;
+
+	/* TIMING CFG 2, 533MHz
+	 * ADD_LAT:       3 Clocks
+	 * CPO:           READLAT + 1
+	 * WR_LAT:        3 Clocks
+	 * RD_TO_PRE:     2 Clocks
+	 * WR_DATA_DELAY: 1/2 Clock
+	 * CKE_PLS:       1 Clock
+	 * FOUR_ACT:      13 Clocks
+	 */
+	ddr->timing_cfg_2 = 0x3318484D;
+
+	/* DDR SDRAM Mode, 533MHz
+	 * MRS:          Extended Mode Register
+	 * OUT:          Outputs enabled
+	 * RDQS:         no
+	 * DQS:          enabled
+	 * OCD:          default state
+	 * RTT:          75 Ohms
+	 * Posted CAS:   3 Clocks
+	 * ODS:          reduced strength
+	 * DLL:          enabled
+	 * MR:           Mode Register
+	 * PD:           fast exit
+	 * WR:           4 Clocks
+	 * DLL:          no DLL reset
+	 * TM:           normal
+	 * CAS latency:  4 Clocks
+	 * BT:           sequential
+	 * Burst length: 4
+	 */
+	ddr->sdram_mode = 0x439E0642;
+
+	/* DDR SDRAM Interval, 533MHz
+	 * REFINT:  1040 Clocks
+	 * BSTOPRE: 256
+	 */
+	ddr->sdram_interval = (1040 << 16) | 0x100;
+
+	/*
+	 * workaround for erratum DD10 of MPC8458 family below rev. 2.0:
+	 * DDR IO receiver must be set to an acceptable bias point by modifying
+	 * a hidden register.
+	 */
+	if (SVR_REV (get_svr ()) < 0x20) {
+		gur->ddrioovcr = 0x90000000;	/* enable, VSEL 1.8V */
+	}
+
+	/* DDR SDRAM CFG 2
+	 * FRC_SR:      normal mode
+	 * SR_IE:       no self-refresh interrupt
+	 * DLL_RST_DIS: don't care, leave at reset value
+	 * DQS_CFG:     differential DQS signals
+	 * ODT_CFG:     assert ODT to internal IOs only during reads to DRAM
+	 * LVWx_CFG:    don't care, leave at reset value
+	 * NUM_PR:      1 refresh will be issued at a time
+	 * DM_CFG:      don't care, leave at reset value
+	 * D_INIT:      no data initialization
+	 */
+	ddr->sdram_cfg_2 = 0x04401000;
+
+	/* DDR SDRAM MODE 2
+	 * MRS: Extended Mode Register 2
+	 */
+	ddr->sdram_mode_2 = 0x8000C000;
+
+	/* DDR SDRAM CLK CNTL
+	 * CLK_ADJUST: 1/2 Clock 0x02000000
+	 * CLK_ADJUST: 5/8 Clock 0x02800000
+	 */
+	ddr->sdram_clk_cntl = 0x02800000;
+
+	/* wait for clock stabilization */
+	asm ("sync;isync;msync");
+	udelay(1000);
+
+	/* DDR SDRAM CLK CNTL
+	 * MEM_EN:       enabled
+	 * SREN:         don't care, leave at reset value
+	 * ECC_EN:       no error report
+	 * RD_EN:        no register DIMMs
+	 * SDRAM_TYPE:   DDR2
+	 * DYN_PWR:      no power management
+	 * 32_BE:        don't care, leave at reset value
+	 * 8_BE:         4 beat burst
+	 * NCAP:         don't care, leave at reset value
+	 * 2T_EN:        1T Timing
+	 * BA_INTLV_CTL: no interleaving
+	 * x32_EN:       x16 organization
+	 * PCHB8:        MA[10] for auto-precharge
+	 * HSE:          half strength for single and 2-layer stacks
+	 * (full strength for 3- and 4-layer stacks no yet considered)
+	 * MEM_HALT:     no halt
+	 * BI:           automatic initialization
+	 */
+	ddr->sdram_cfg = 0x83000008;
+	asm ("sync; isync; msync");
+	udelay(1000);
+
+#else /* !CONFIG_TQM8548 */
 	switch (casl) {
 	case 20:
 		cfg_ddr_timing1 = 0x47405331 | (3 << 16);
@@ -97,6 +228,7 @@ long int sdram_setup (int casl)
 	ddr->sdram_cfg = 0xc2000000;		/* unbuffered,no DYN_PWR */
 	asm ("sync; isync; msync");
 	udelay (1000);
+#endif /* CONFIG_TQM8548 */
 
 	for (i = 0; i < N_DDR_CS_CONF; i++) {
 		ddr->cs0_config = ddr_cs_conf[i].reg;
@@ -108,11 +240,25 @@ long int sdram_setup (int casl)
 			 */
 			ddr->cs0_bnds = (ddr_cs_conf[i].size - 1) >> 24;
 
-			return ddr_cs_conf[i].size;
+			break;
 		}
 	}
 
-	return 0;		/* nothing found !              */
+#ifdef CONFIG_TQM8548
+	if (i < N_DDR_CS_CONF) {
+		/* Adjust refresh rate for DDR2 */
+
+		ddr->timing_cfg_3 = ddr_cs_conf[i].refresh & 0x00070000;
+
+		ddr->timing_cfg_1 = (ddr->timing_cfg_1 & 0xFFFF0FFF) |
+		    (ddr_cs_conf[i].refresh & 0x0000F000);
+
+		return ddr_cs_conf[i].size;
+	}
+#endif /* CONFIG_TQM8548 */
+
+	/* return size if detected, else return 0 */
+	return (i < N_DDR_CS_CONF) ? ddr_cs_conf[i].size : 0;
 }
 
 void board_add_ram_info (int use_default)
diff --git a/board/tqc/tqm85xx/tqm85xx.c b/board/tqc/tqm85xx/tqm85xx.c
index 17df3bb..f96cec3 100644
--- a/board/tqc/tqm85xx/tqm85xx.c
+++ b/board/tqc/tqm85xx/tqm85xx.c
@@ -1,4 +1,9 @@
 /*
+ * (C) Copyright 2008 Wolfgang Grandegger <wg@denx.de>
+ *
+ * (C) Copyright 2006
+ * Thomas Waehner, TQ-Systems GmbH, thomas.waehner@tqs.de.
+ *
  * (C) Copyright 2005
  * Stefan Roese, DENX Software Engineering, sr@denx.de.
  *
@@ -357,6 +362,30 @@ static void upmc_write (u_char addr, uint val)
 }
 #endif /* CONFIG_CAN_DRIVER */
 
+uint get_lbc_clock (void)
+{
+	volatile ccsr_lbc_t *lbc = (void *)(CFG_MPC85xx_LBC_ADDR);
+	sys_info_t sys_info;
+	ulong clkdiv = lbc->lcrr & 0x0f;
+
+	get_sys_info (&sys_info);
+
+	if (clkdiv == 2 || clkdiv == 4 || clkdiv == 8) {
+#ifdef CONFIG_MPC8548
+		/*
+		 * Yes, the entire PQ38 family use the same
+		 * bit-representation for twice the clock divider value.
+		 */
+		clkdiv *= 2;
+#endif
+		return sys_info.freqSystemBus / clkdiv;
+	}
+
+	puts("Invalid clock divider value in CFG_LBC_LCRR\n");
+
+	return 0;
+}
+
 /*
  * Initialize Local Bus
  */
@@ -364,10 +393,71 @@ void local_bus_init (void)
 {
 	volatile ccsr_gur_t *gur = (void *)(CFG_MPC85xx_GUTS_ADDR);
 	volatile ccsr_lbc_t *lbc = (void *)(CFG_MPC85xx_LBC_ADDR);
+	uint lbc_mhz = get_lbc_clock ()  / 1000000;
+
+#ifdef CONFIG_MPC8548
+	uint svr = get_svr ();
+	uint lcrr;
+
+	/*
+	 * MPC revision < 2.0
+	 * According to MPC8548E_Device_Errata Rev. L, Erratum LBIU1:
+	 * Modify engineering use only register at address 0xE_0F20.
+	 * "1. Read register at offset 0xE_0F20
+	 * 2. And value with 0x0000_FFFF
+	 * 3. OR result with 0x0000_0004
+	 * 4. Write result back to offset 0xE_0F20."
+	 *
+	 * According to MPC8548E_Device_Errata Rev. L, Erratum LBIU2:
+	 * Modify engineering use only register at address 0xE_0F20.
+	 * "1. Read register at offset 0xE_0F20
+	 * 2. And value with 0xFFFF_FFDF
+	 * 3. Write result back to offset 0xE_0F20."
+	 *
+	 * Since it is the same register, we do the modification in one step.
+	 */
+	if (SVR_MAJ (svr) < 2) {
+		uint dummy = gur->lbiuiplldcr1;
+		dummy &= 0x0000FFDF;
+		dummy |= 0x00000004;
+		gur->lbiuiplldcr1 = dummy;
+	}
 
-	uint clkdiv;
-	uint lbc_hz;
-	sys_info_t sysinfo;
+	lcrr = CFG_LBC_LCRR;
+
+	/*
+	 * Local Bus Clock > 83.3 MHz. According to timing
+	 * specifications set LCRR[EADC] to 2 delay cycles.
+	 */
+	if (lbc_mhz > 83) {
+		lcrr &= ~LCRR_EADC;
+		lcrr |= LCRR_EADC_2;
+	}
+
+	/*
+	 * According to MPC8548ERMAD Rev. 1.3, 13.3.1.16, 13-30
+	 * disable PLL bypass for Local Bus Clock > 83 MHz.
+	 */
+	if (lbc_mhz >= 66)
+		lcrr &= (~LCRR_DBYP);	/* DLL Enabled */
+
+	else
+		lcrr |= LCRR_DBYP;	/* DLL Bypass */
+
+	lbc->lcrr = lcrr;
+	asm ("sync;isync;msync");
+
+	/*
+	 * According to MPC8548ERMAD Rev.1.3 read back LCRR
+	 * and terminate with isync
+	 */
+	lcrr = lbc->lcrr;
+	asm ("isync;");
+
+	/* let DLL stabilize */
+	udelay (500);
+
+#else /* !CONFIG_MPC8548 */
 
 	/*
 	 * Errata LBC11.
@@ -378,16 +468,12 @@ void local_bus_init (void)
 	 * Between 66 and 133, the DLL is enabled with an override workaround.
 	 */
 
-	get_sys_info (&sysinfo);
-	clkdiv = lbc->lcrr & 0x0f;
-	lbc_hz = sysinfo.freqSystemBus / 1000000 / clkdiv;
-
-	if (lbc_hz < 66) {
-		lbc->lcrr = CFG_LBC_LCRR | 0x80000000;	/* DLL Bypass */
+	if (lbc_mhz < 66) {
+		lbc->lcrr = CFG_LBC_LCRR | LCRR_DBYP;	/* DLL Bypass */
 		lbc->ltedr = 0xa4c80000;	/* DK: !!! */
 
-	} else if (lbc_hz >= 133) {
-		lbc->lcrr = CFG_LBC_LCRR & (~0x80000000);	/* DLL Enabled */
+	} else if (lbc_mhz >= 133) {
+		lbc->lcrr = CFG_LBC_LCRR & (~LCRR_DBYP);	/* DLL Enabled */
 
 	} else {
 		/*
@@ -402,7 +488,7 @@ void local_bus_init (void)
 			lbc->lcrr = 0x10000004;
 		}
 
-		lbc->lcrr = CFG_LBC_LCRR & (~0x80000000);	/* DLL Enabled */
+		lbc->lcrr = CFG_LBC_LCRR & (~LCRR_DBYP);	/* DLL Enabled */
 		udelay (200);
 
 		/*
@@ -413,13 +499,14 @@ void local_bus_init (void)
 		gur->lbcdllcr = (((temp_lbcdll & 0xff) << 16) | 0x80000000);
 		asm ("sync;isync;msync");
 	}
+#endif /* !CONFIG_MPC8548 */
 
 #ifdef	CONFIG_CAN_DRIVER
 	/*
 	 * According to timing specifications EAD must be
 	 * set if Local Bus Clock is > 83 MHz.
 	 */
-	if (lbc_hz > 83)
+	if (lbc_mhz > 83)
 		out_be32 (&lbc->or2, CFG_OR2_CAN | OR_UPM_EAD);
 	else
 		out_be32 (&lbc->or2, CFG_OR2_CAN);
diff --git a/drivers/input/ps2ser.c b/drivers/input/ps2ser.c
index 4e304f7..c1741ea 100644
--- a/drivers/input/ps2ser.c
+++ b/drivers/input/ps2ser.c
@@ -49,7 +49,8 @@ DECLARE_GLOBAL_DATA_PTR;
 #error CONFIG_PS2SERIAL must be in 1 ... 6
 #endif
 
-#elif defined(CONFIG_MPC8540) || defined(CONFIG_MPC8541) || defined(CONFIG_MPC8555)
+#elif defined(CONFIG_MPC8540) || defined(CONFIG_MPC8541) || \
+      defined(CONFIG_MPC8548) || defined(CONFIG_MPC8555)
 
 #if CONFIG_PS2SERIAL == 1
 #define COM_BASE (CFG_CCSRBAR+0x4500)
@@ -65,7 +66,9 @@ static int	ps2ser_getc_hw(void);
 static void	ps2ser_interrupt(void *dev_id);
 
 extern struct	serial_state rs_table[]; /* in serial.c */
-#if !defined(CONFIG_MPC5xxx) && !defined(CONFIG_MPC8540) && !defined(CONFIG_MPC8541) && !defined(CONFIG_MPC8555)
+#if !defined(CONFIG_MPC5xxx) && !defined(CONFIG_MPC8540) && \
+    !defined(CONFIG_MPC8541) && !defined(CONFIG_MPC8548) && \
+    !defined(CONFIG_MPC8555)
 static struct	serial_state *state;
 #endif
 
@@ -120,7 +123,8 @@ int ps2ser_init(void)
 	return (0);
 }
 
-#elif defined(CONFIG_MPC8540) || defined(CONFIG_MPC8541) || defined(CONFIG_MPC8555)
+#elif defined(CONFIG_MPC8540) || defined(CONFIG_MPC8541) || \
+      defined(CONFIG_MPC8548) || defined(CONFIG_MPC8555)
 int ps2ser_init(void)
 {
 	NS16550_t com_port = (NS16550_t)COM_BASE;
@@ -186,7 +190,8 @@ void ps2ser_putc(int chr)
 {
 #ifdef CONFIG_MPC5xxx
 	volatile struct mpc5xxx_psc *psc = (struct mpc5xxx_psc *)PSC_BASE;
-#elif defined(CONFIG_MPC8540) || defined(CONFIG_MPC8541) || defined(CONFIG_MPC8555)
+#elif defined(CONFIG_MPC8540) || defined(CONFIG_MPC8541) || \
+      defined(CONFIG_MPC8548) || defined(CONFIG_MPC8555)
 	NS16550_t com_port = (NS16550_t)COM_BASE;
 #endif
 #ifdef DEBUG
@@ -197,7 +202,8 @@ void ps2ser_putc(int chr)
 	while (!(psc->psc_status & PSC_SR_TXRDY));
 
 	psc->psc_buffer_8 = chr;
-#elif defined(CONFIG_MPC8540) || defined(CONFIG_MPC8541) || defined(CONFIG_MPC8555)
+#elif defined(CONFIG_MPC8540) || defined(CONFIG_MPC8541) || \
+      defined(CONFIG_MPC8548) || defined(CONFIG_MPC8555)
 	while ((com_port->lsr & LSR_THRE) == 0);
 	com_port->thr = chr;
 #else
@@ -211,7 +217,8 @@ static int ps2ser_getc_hw(void)
 {
 #ifdef CONFIG_MPC5xxx
 	volatile struct mpc5xxx_psc *psc = (struct mpc5xxx_psc *)PSC_BASE;
-#elif defined(CONFIG_MPC8540) || defined(CONFIG_MPC8541) || defined(CONFIG_MPC8555)
+#elif defined(CONFIG_MPC8540) || defined(CONFIG_MPC8541) || \
+      defined(CONFIG_MPC8548) || defined(CONFIG_MPC8555)
 	NS16550_t com_port = (NS16550_t)COM_BASE;
 #endif
 	int res = -1;
@@ -220,7 +227,8 @@ static int ps2ser_getc_hw(void)
 	if (psc->psc_status & PSC_SR_RXRDY) {
 		res = (psc->psc_buffer_8);
 	}
-#elif defined(CONFIG_MPC8540) || defined(CONFIG_MPC8541) || defined(CONFIG_MPC8555)
+#elif defined(CONFIG_MPC8540) || defined(CONFIG_MPC8541) || \
+      defined(CONFIG_MPC8548) || defined(CONFIG_MPC8555)
 	if (com_port->lsr & LSR_DR) {
 		res = com_port->rbr;
 	}
@@ -279,7 +287,8 @@ static void ps2ser_interrupt(void *dev_id)
 {
 #ifdef CONFIG_MPC5xxx
 	volatile struct mpc5xxx_psc *psc = (struct mpc5xxx_psc *)PSC_BASE;
-#elif defined(CONFIG_MPC8540) || defined(CONFIG_MPC8541) || defined(CONFIG_MPC8555)
+#elif defined(CONFIG_MPC8540) || defined(CONFIG_MPC8541) || \
+      defined(CONFIG_MPC8548) || defined(CONFIG_MPC8555)
 	NS16550_t com_port = (NS16550_t)COM_BASE;
 #endif
 	int chr;
@@ -289,7 +298,8 @@ static void ps2ser_interrupt(void *dev_id)
 		chr = ps2ser_getc_hw();
 #ifdef CONFIG_MPC5xxx
 		status = psc->psc_status;
-#elif defined(CONFIG_MPC8540) || defined(CONFIG_MPC8541) || defined(CONFIG_MPC8555)
+#elif defined(CONFIG_MPC8540) || defined(CONFIG_MPC8541) || \
+      defined(CONFIG_MPC8548) || defined(CONFIG_MPC8555)
 		status = com_port->lsr;
 #else
 		status = ps2ser_in(UART_IIR);
@@ -305,7 +315,8 @@ static void ps2ser_interrupt(void *dev_id)
 		}
 #ifdef CONFIG_MPC5xxx
 	} while (status & PSC_SR_RXRDY);
-#elif defined(CONFIG_MPC8540) || defined(CONFIG_MPC8541) || defined(CONFIG_MPC8555)
+#elif defined(CONFIG_MPC8540) || defined(CONFIG_MPC8541) || \
+      defined(CONFIG_MPC8548) || defined(CONFIG_MPC8555)
 	} while (status & LSR_DR);
 #else
 	} while (status & UART_IIR_RDI);
diff --git a/include/configs/TQM85xx.h b/include/configs/TQM85xx.h
index 6320f00..a02d001 100644
--- a/include/configs/TQM85xx.h
+++ b/include/configs/TQM85xx.h
@@ -1,4 +1,7 @@
 /*
+ * (C) Copyright 2007
+ * Thomas Waehner, TQ-System GmbH, thomas.waehner@tqs.de.
+ *
  * (C) Copyright 2005
  * Stefan Roese, DENX Software Engineering, sr@denx.de.
  *
@@ -27,7 +30,7 @@
  */
 
 /*
- * TQM85xx (8560/40/55/41) board configuration file
+ * TQM85xx (8560/40/55/41/48) board configuration file
  */
 
 #ifndef __CONFIG_H
@@ -44,9 +47,9 @@
 #define CONFIG_MISC_INIT_R	1	/* Call misc_init_r		*/
 
 /*
- * Only MPC8540 doesn't have CPM module
+ * MPC8540 and MPC8548 don't have CPM module
  */
-#ifndef CONFIG_MPC8540
+#if !defined(CONFIG_MPC8540) && !defined(CONFIG_MPC8548)
 #define CONFIG_CPM2		1	/* has CPM2			*/
 #endif
 
@@ -58,8 +61,8 @@
  * sysclk for MPC85xx
  *
  * Two valid values are:
- *    33000000
- *    66000000
+ *    33333333
+ *    66666666
  *
  * Most PCI cards are still 33Mhz, so in the presence of PCI, 33MHz
  * is likely the desired value here, so that is now the default.
@@ -106,16 +109,19 @@
 #define CONFIG_DDR_DEFAULT_CL	25		/* CAS latency 2,5	*/
 #endif /* CONFIG_TQM8540 || CONFIG_TQM8560 */
 
-#if defined(CONFIG_TQM8541) || defined(CONFIG_TQM8555)
+#if defined(CONFIG_TQM8541) || defined(CONFIG_TQM8555) || \
+    defined(CONFIG_TQM8548)
 #define CONFIG_DDR_DEFAULT_CL	30		/* CAS latency 3	*/
-#endif /* CONFIG_TQM8541 || CONFIG_TQM8555 */
+#endif /* CONFIG_TQM8541 || CONFIG_TQM8555 || CONFIG_TQM8548 */
 
 /*
  * Old TQM85xx boards have 'M' type Spansion Flashes from the S29GLxxxM
  * series while new boards have 'N' type Flashes from the S29GLxxxN
  * series, which have bigger sectors: 2 x 128 instead of 2 x 64 KB.
  */
-#undef CONFIG_TQM_FLASH_N_TYPE
+#ifdef CONFIG_TQM8548
+#define CONFIG_TQM_FLASH_N_TYPE
+#endif /* CONFIG_TQM8548 */
 
 /*
  * Flash on the Local Bus
@@ -127,6 +133,25 @@
 #define CFG_LBC_FLASH_BASE	CFG_FLASH1	/* Localbus flash start	*/
 #define CFG_FLASH_BASE		CFG_LBC_FLASH_BASE  /* start of FLASH	*/
 
+/* Default ORx timings are for <= 41.7 MHz Local Bus Clock.
+ *
+ * Note: According to timing specifications external addr latch delay
+ * (EAD, bit #0) must be set if Local Bus Clock is > 83 MHz.
+ *
+ * For other Local Bus Clocks see following table:
+ *
+ * Clock/MHz   CFG_ORx_PRELIM
+ * 166         0x.....CA5
+ * 133         0x.....C85
+ * 100         0x.....C65
+ *  83         0x.....FA2
+ *  66         0x.....C82
+ *  50         0x.....C60
+ *  42         0x.....040
+ *  33         0x.....030
+ *  25         0x.....020
+ *
+ */
 #define CFG_BR0_PRELIM		0xfc001801	/* port size 32bit	*/
 #define CFG_OR0_PRELIM		0xfc000040	/* 64MB Flash		*/
 #define CFG_BR1_PRELIM		0xf8001801	/* port size 32bit	*/
@@ -136,6 +161,7 @@
 #define CFG_FLASH_CFI_DRIVER		/* Use common CFI driver	*/
 #define CFG_FLASH_EMPTY_INFO		/* print 'E' for empty sector	*/
 #define CFG_FLASH_QUIET_TEST	1	/* don't warn upon unknown flash*/
+#define CFG_FLASH_USE_BUFFER_WRITE	1 /* speed up output to Flash	*/
 
 #define CFG_MAX_FLASH_BANKS	2	/* number of banks		*/
 #define CFG_MAX_FLASH_SECT	512	/* sectors per device		*/
@@ -145,6 +171,14 @@
 
 #define CFG_MONITOR_BASE	TEXT_BASE	/* start of monitor	*/
 
+/*
+ * Note: when changing the Local Bus clock divider you have to
+ * change the timing values in CFG_ORx_PRELIM.
+ *
+ * LCRR[00:03] CLKDIV: System (CCB) clock divider. Valid values are 2, 4, 8.
+ * LCRR[16:17] EADC  : External address delay cycles. It should be set to 2
+ *                     for Local Bus Clock > 83.3 MHz.
+ */
 #define CFG_LBC_LCRR		0x00030008	/* LB clock ratio reg	*/
 #define CFG_LBC_LBCR		0x00000000	/* LB config reg	*/
 #define CFG_LBC_LSRT		0x20000000	/* LB sdram refresh timer */
@@ -296,6 +330,27 @@
 #define CONFIG_HAS_ETH1
 #define CONFIG_HAS_ETH2
 
+#ifdef CONFIG_TQM8548
+/*
+ * TQM8548 has 4 ethernet ports. 4 ETSEC's.
+ *
+ * On the STK85xx Starterkit the ETSEC3/4 ports are on an
+ * additional adapter (AIO) between module and Starterkit.
+ */
+#define CONFIG_TSEC3	1
+#define CONFIG_TSEC3_NAME	"TSEC2"
+#define CONFIG_TSEC4	1
+#define CONFIG_TSEC4_NAME	"TSEC3"
+#define TSEC3_PHY_ADDR		4
+#define TSEC4_PHY_ADDR		5
+#define TSEC3_PHYIDX		0
+#define TSEC4_PHYIDX		0
+#define TSEC3_FLAGS		(TSEC_GIGABIT | TSEC_REDUCED)
+#define TSEC4_FLAGS		(TSEC_GIGABIT | TSEC_REDUCED)
+#define CONFIG_HAS_ETH3
+#define CONFIG_HAS_ETH4
+#endif	/* CONFIG_TQM8548 */
+
 /* Options are TSEC[0-1], FEC */
 #define CONFIG_ETHPRIME		"TSEC0"