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authorWolfgang Grandegger <wg@grandegger.com>2008-06-05 13:12:07 +0200
committerAndrew Fleming-AFLEMING <afleming@freescale.com>2008-06-11 00:01:43 -0500
commit1287e0c55a2ee2c575ac9ce8e4302cd4085be876 (patch)
tree55bcfa2cfcb7c444a6da3be9c6f17cf3773e9a67 /board/tqc/tqm85xx
parent25991353204c78b094c3c1fec90182dcd607ab8f (diff)
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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>
Diffstat (limited to 'board/tqc/tqm85xx')
-rw-r--r--board/tqc/tqm85xx/sdram.c150
-rw-r--r--board/tqc/tqm85xx/tqm85xx.c113
2 files changed, 248 insertions, 15 deletions
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);