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Diffstat (limited to 'board/omap2420h4/mem.c')
-rw-r--r--board/omap2420h4/mem.c250
1 files changed, 146 insertions, 104 deletions
diff --git a/board/omap2420h4/mem.c b/board/omap2420h4/mem.c
index 5e23d61..3ce38cc 100644
--- a/board/omap2420h4/mem.c
+++ b/board/omap2420h4/mem.c
@@ -38,9 +38,8 @@
*************************************************************/
void sdelay (unsigned long loops)
{
- __asm__ volatile ("1:\n"
- "subs %0, %1, #1\n"
- "bne 1b":"=r" (loops):"0" (loops));
+ __asm__ volatile ("1:\n" "subs %0, %1, #1\n"
+ "bne 1b":"=r" (loops):"0" (loops));
}
/*********************************************************************************
@@ -50,12 +49,10 @@ void sdelay (unsigned long loops)
void prcm_init(void)
{
u32 rev,div;
-#ifdef CONFIG_PARTIAL_SRAM
void (*f_lock_pll) (u32, u32, u32, u32);
extern void *_end_vect, *_start;
f_lock_pll = (void *)((u32)&_end_vect - (u32)&_start + SRAM_VECT_CODE);
-#endif
__raw_writel(0, CM_FCLKEN1_CORE); /* stop all clocks to reduce ringing */
__raw_writel(0, CM_FCLKEN2_CORE); /* may not be necessary */
@@ -75,45 +72,33 @@ void prcm_init(void)
__raw_writel(div, CM_CLKSEL1_CORE);/* set L3/L4/USB/Display/Vlnc/SSi dividers */
sdelay(1000);
-#ifndef CONFIG_PARTIAL_SRAM
- /* If running fully from SRAM this is OK. The Flash bus drops out for just a little.
- * but then comes back. If running from Flash this sequence kills you, thus you need
- * to run it using CONFIG_PARTIAL_SRAM.
- */
- __raw_writel(MODE_BYPASS_FAST, CM_CLKEN_PLL); /* go to bypass, fast relock */
- wait_on_value(BIT0|BIT1, BIT1, CM_IDLEST_CKGEN, LDELAY); /* wait till in bypass */
-
- /* set clock selection and dpll dividers. */
- __raw_writel(DPLL_VAL, CM_CLKSEL1_PLL); /* set pll for target rate */
- __raw_writel(COMMIT_DIVIDERS, PRCM_CLKCFG_CTRL); /* commit dividers */
- sdelay(10000);
- __raw_writel(DPLL_LOCK, CM_CLKEN_PLL); /* enable dpll */
- sdelay(10000);
- wait_on_value(BIT0|BIT1, BIT2, CM_IDLEST_CKGEN, LDELAY); /*wait for dpll lock */
-#else
-/* if running from flash, need to jump to small relocated code area in SRAM.
- * This is the only safe spot to do configurations from.
- */
- (*f_lock_pll)(PRCM_CLKCFG_CTRL, CM_CLKEN_PLL, DPLL_LOCK, CM_IDLEST_CKGEN);
-#endif
+ if(running_in_sram()){
+ /* If running fully from SRAM this is OK. The Flash bus drops out for just a little.
+ * but then comes back. If running from Flash this sequence kills you, thus you need
+ * to run it using CONFIG_PARTIAL_SRAM.
+ */
+ __raw_writel(MODE_BYPASS_FAST, CM_CLKEN_PLL); /* go to bypass, fast relock */
+ wait_on_value(BIT0|BIT1, BIT0, CM_IDLEST_CKGEN, LDELAY); /* wait till in bypass */
+ sdelay(1000);
+ /* set clock selection and dpll dividers. */
+ __raw_writel(DPLL_VAL, CM_CLKSEL1_PLL); /* set pll for target rate */
+ __raw_writel(COMMIT_DIVIDERS, PRCM_CLKCFG_CTRL); /* commit dividers */
+ sdelay(10000);
+ __raw_writel(DPLL_LOCK, CM_CLKEN_PLL); /* enable dpll */
+ sdelay(10000);
+ wait_on_value(BIT0|BIT1, BIT1, CM_IDLEST_CKGEN, LDELAY); /*wait for dpll lock */
+ }else if(running_in_flash()){
+ /* if running from flash, need to jump to small relocated code area in SRAM.
+ * This is the only safe spot to do configurations from.
+ */
+ (*f_lock_pll)(PRCM_CLKCFG_CTRL, CM_CLKEN_PLL, DPLL_LOCK, CM_IDLEST_CKGEN);
+ }
__raw_writel(DPLL_LOCK|APLL_LOCK, CM_CLKEN_PLL); /* enable apll */
wait_on_value(BIT8, BIT8, CM_IDLEST_CKGEN, LDELAY); /* wait for apll lock */
sdelay(1000);
}
-/***********************************************
- * memif_init() - init the gpmc and sdrc
- * - early init routines, called from flash or
- * SRAM.
- ***********************************************/
-void memif_init(void)
-{
- sdrc_init();
-#ifndef CONFIG_PARTIAL_SRAM /* don't init if calling from flash */
- gpmc_init();
-#endif
-}
/********************************************************
* mem_ok() - test used to see if timings are correct
@@ -121,11 +106,17 @@ void memif_init(void)
* we are currently using.
*******************************************************/
u32 mem_ok(void)
-{ u32 val;
- __raw_writel(0x0,OMAP2420_SDRC_CS0+0x400); /* clear pos A */
- __raw_writel(0x12345678, OMAP2420_SDRC_CS0);/* pattern to pos B */
- val = __raw_readl(OMAP2420_SDRC_CS0+0x400); /* get pos A value */
- if (val != 0) /* see if pos A value changed*/
+{
+ u32 val1, val2;
+ u32 pattern = 0x12345678;
+
+ __raw_writel(0x0,OMAP2420_SDRC_CS0+0x400); /* clear pos A */
+ __raw_writel(pattern, OMAP2420_SDRC_CS0); /* pattern to pos B */
+ __raw_writel(0x0,OMAP2420_SDRC_CS0+4); /* remove pattern off the bus */
+ val1 = __raw_readl(OMAP2420_SDRC_CS0+0x400); /* get pos A value */
+ val2 = __raw_readl(OMAP2420_SDRC_CS0); /* get val2 */
+
+ if ((val1 != 0) || (val2 != pattern)) /* see if pos A value changed*/
return(0);
else
return(1);
@@ -142,122 +133,157 @@ void sdrc_init(void)
do_sdrc_init(SDRC_CS0_OSET, EARLY_INIT); /* only init up first bank here */
}
-/**********************************************************
+/*************************************************************************
* do_sdrc_init(): initialize the SDRAM for use.
* -called from low level code with stack only.
* -code sets up SDRAM timing and muxing for 2422 or 2420.
* -optimal settings can be placed here, or redone after i2c
* inspection of board info
*
- * !!! When ES1 comes out need to conditionalize RFR value!!!
- **********************************************************/
+ * This is a bit ugly, but should handle all memory moduels
+ * used with the H4. The first time though this code from s_init()
+ * we configure the first chip select. Later on we come back and
+ * will configure the 2nd chip select if it exists.
+ *
+ **************************************************************************/
void do_sdrc_init(u32 offset, u32 early)
{
- u32 cpu, bug=0, rev, shared=0, cs0=0, pmask=0,first=1;
+ u32 cpu, bug=0, rev, common=0, cs0=0, pmask=0, pass_type;
sdrc_data_t *sdata; /* do not change type */
+ u32 a, b, r;
static const sdrc_data_t sdrc_2422 =
{
- H4_2422_SDRC_SHARING, H4_2422_SDRC_MDCFG_0, H4_2422_SDRC_ACTIM_CTRLA_0,
- H4_2422_SDRC_ACTIM_CTRLB_0, H4_2422_SDRC_RFR_CTRL_ES1, H4_2422_SDRC_MR_0,
- H4_2422_SDRC_DLLA_CTRL, H4_2422_SDRC_DLLB_CTRL
+ H4_2422_SDRC_SHARING, H4_2422_SDRC_MDCFG_0_DDR, 0 , H4_2422_SDRC_ACTIM_CTRLA_0,
+ H4_2422_SDRC_ACTIM_CTRLB_0, H4_2422_SDRC_RFR_CTRL_ES1, H4_2422_SDRC_MR_0_DDR,
+ 0, H4_2422_SDRC_DLLA_CTRL, H4_2422_SDRC_DLLB_CTRL
};
static const sdrc_data_t sdrc_2420 =
{
- H4_2420_SDRC_SHARING, H4_2420_SDRC_MDCFG_0, H4_2420_SDRC_ACTIM_CTRLA_0,
- H4_2420_SDRC_ACTIM_CTRLB_0, H4_2420_SDRC_RFR_CTRL_ES1, H4_2420_SDRC_MR_0,
+ H4_2420_SDRC_SHARING, H4_2420_SDRC_MDCFG_0_DDR, H4_2420_SDRC_MDCFG_0_SDR,
+ H4_2420_SDRC_ACTIM_CTRLA_0, H4_2420_SDRC_ACTIM_CTRLB_0,
+ H4_2420_SDRC_RFR_CTRL_ES1, H4_2420_SDRC_MR_0_DDR, H4_2420_SDRC_MR_0_SDR,
H4_2420_SDRC_DLLA_CTRL, H4_2420_SDRC_DLLB_CTRL
};
if (offset == SDRC_CS0_OSET)
- cs0 = shared = 1; /* int regs shared between both chip select */
+ cs0 = common = 1; /* int regs shared between both chip select */
cpu = get_cpu_type();
- /* warning generated, though code generation is correct. this may bite later, but is ok for now.
- * there is only so much C code you can do on stack only operation.
+ /* warning generated, though code generation is correct. this may bite later,
+ * but is ok for now. there is only so much C code you can do on stack only
+ * operation.
*/
- if (cpu == CPU_2422)
- sdata = &sdrc_2422;
- else
- sdata = &sdrc_2420;
- __asm__ __volatile__("": : :"memory");
-#ifdef CONFIG_PARTIAL_SRAM
- /* u-boot is compiled to run in DDR at 8xxxxxxx. If we use data here which is not pc relative
- * we need to get the address correct. We need to find the current flash mapping to dress up
- * the initial pointer load. As long as this is const data we should be ok.
- */
- if(early)
- sdata = (sdrc_data_t *)(((u32)sdata & 0x0003FFFF) | get_gpmc0_base());
-#endif
+ if (cpu == CPU_2422){
+ sdata = (sdrc_data_t *)&sdrc_2422;
+ pass_type = STACKED;
+ }
+ else{
+ sdata = (sdrc_data_t *)&sdrc_2420;
+ pass_type = IP_DDR;
+ }
- men_combo:
+ __asm__ __volatile__("": : :"memory"); /* limit compiler scope */
- if (!early && get_mem_type() == DDR_COMBO) { /* combo part has a shared CKE signal, can't use feature */
+ /* u-boot is compiled to run in DDR or SRAM at 8xxxxxxx or 4xxxxxxx.
+ * If we are running in flash prior to relocation and we use data
+ * here which is not pc relative we need to get the address correct.
+ * We need to find the current flash mapping to dress up the initial
+ * pointer load. As long as this is const data we should be ok.
+ */
+ if((early) && running_in_flash()){
+ sdata = (sdrc_data_t *)(((u32)sdata & 0x0003FFFF) | get_gpmc0_base());
+ /* NOR internal boot offset is 0x4000 from xloader signature */
+ if(running_from_internal_boot())
+ sdata = (sdrc_data_t *)((u32)sdata + 0x4000);
+ }
+ if (!early && (get_mem_type() == DDR_COMBO)) {/* combo part has a shared CKE signal, can't use feature */
pmask = BIT2;
- first = 0; /* trigger ddr_combo init */
+ pass_type = COMBO_DDR; /* CS1 config */
}
- if (shared) {
- __raw_writel(__raw_readl(SMS_SYSCONFIG)|SMART_IDLE, SMS_SYSCONFIG);
- __raw_writel(SMART_IDLE|SOFTRESET, SDRC_SYSCONFIG); /* reset sdrc */
- wait_on_value(BIT0, BIT0, SDRC_STATUS, 12000000); /* wait till reset done set */
- __raw_writel(SMART_IDLE, SDRC_SYSCONFIG); /* clear soft reset */
+next_mem_type:
+ if (common) { /* do a SDRC reset between types to clear regs*/
+ __raw_writel(SOFTRESET, SDRC_SYSCONFIG); /* reset sdrc */
+ wait_on_value(BIT0, BIT0, SDRC_STATUS, 12000000);/* wait till reset done set */
+ __raw_writel(0, SDRC_SYSCONFIG); /* clear soft reset */
__raw_writel(sdata->sdrc_sharing, SDRC_SHARING);
- __raw_writel((__raw_readl(SDRC_POWER)|SMART_IDLE) & ~pmask, SDRC_POWER);
+ __raw_writel((__raw_readl(SDRC_POWER)) & ~pmask, SDRC_POWER);
+#ifdef POWER_SAVE
+ __raw_writel(__raw_readl(SMS_SYSCONFIG)|SMART_IDLE, SMS_SYSCONFIG);
+ __raw_writel(sdata->sdrc_sharing|SMART_IDLE, SDRC_SHARING);
+ __raw_writel((__raw_readl(SDRC_POWER)|BIT6) & ~pmask, SDRC_POWER);
+#endif
+ }
+
+ if ((pass_type == IP_DDR) || (pass_type == STACKED)) /* (IP ddr-CS0),(2422-CS0/CS1) */
+ __raw_writel(sdata->sdrc_mdcfg_0_ddr, SDRC_MCFG_0+offset);
+ else if (pass_type == COMBO_DDR){ /* (combo-CS0/CS1) */
+ __raw_writel(H4_2420_COMBO_MDCFG_0_DDR,SDRC_MCFG_0+offset);
+ } else if (pass_type == IP_SDR){ /* ip sdr-CS0 */
+ __raw_writel(sdata->sdrc_mdcfg_0_sdr, SDRC_MCFG_0+offset);
}
- if (first)
- __raw_writel(sdata->sdrc_mdcfg_0, SDRC_MCFG_0+offset);
- else {
- __raw_writel((__raw_readl(SDRC_POWER)|SMART_IDLE) & ~pmask, SDRC_POWER);
- __raw_writel(H4_2420_COMBO_MDCFG_0,SDRC_MCFG_0+offset);
+
+ if(pass_type == IP_SDR){ /* SDRAM can run full speed only rated for 105MHz*/
+ a = H4_242X_SDRC_ACTIM_CTRLA_0_100MHz;
+ b = H4_242X_SDRC_ACTIM_CTRLB_0_100MHz;
+ r = H4_2420_SDRC_RFR_CTRL;
+ } else {
+ a = sdata->sdrc_actim_ctrla_0;
+ b = sdata->sdrc_actim_ctrlb_0;
+ r = sdata->sdrc_rfr_ctrl;
}
if (cs0) {
- __raw_writel(sdata->sdrc_actim_ctrla_0, SDRC_ACTIM_CTRLA_0);
- __raw_writel(sdata->sdrc_actim_ctrlb_0, SDRC_ACTIM_CTRLB_0);
+ __raw_writel(a, SDRC_ACTIM_CTRLA_0);
+ __raw_writel(b, SDRC_ACTIM_CTRLB_0);
} else {
- __raw_writel(sdata->sdrc_actim_ctrla_0, SDRC_ACTIM_CTRLA_1);
- __raw_writel(sdata->sdrc_actim_ctrlb_0, SDRC_ACTIM_CTRLB_1);
+ __raw_writel(a, SDRC_ACTIM_CTRLA_1);
+ __raw_writel(b, SDRC_ACTIM_CTRLB_1);
}
- __raw_writel(sdata->sdrc_rfr_ctrl, SDRC_RFR_CTRL+offset);
+ __raw_writel(r, SDRC_RFR_CTRL+offset);
- /* init sequence for _mDDR_ using manual commands (DDR is a bit different) */
+ /* init sequence for mDDR/mSDR using manual commands (DDR is a bit different) */
__raw_writel(CMD_NOP, SDRC_MANUAL_0+offset);
- sdelay(5000); /* susposed to be 100us per design spec for mddr*/
+ sdelay(5000); /* susposed to be 100us per design spec for mddr/msdr */
__raw_writel(CMD_PRECHARGE, SDRC_MANUAL_0+offset);
__raw_writel(CMD_AUTOREFRESH, SDRC_MANUAL_0+offset);
__raw_writel(CMD_AUTOREFRESH, SDRC_MANUAL_0+offset);
/*
* CSx SDRC Mode Register
- * Burst length = 4 - DDR memory
+ * Burst length = (4 - DDR) (2-SDR)
* Serial mode
* CAS latency = x
*/
- __raw_writel(sdata->sdrc_mr_0, SDRC_MR_0+offset);
+ if(pass_type == IP_SDR)
+ __raw_writel(sdata->sdrc_mr_0_sdr, SDRC_MR_0+offset);
+ else
+ __raw_writel(sdata->sdrc_mr_0_ddr, SDRC_MR_0+offset);
- /* NOTE: ES1 242x _BUG_ DLL */
+ /* NOTE: ES1 242x _BUG_ DLL + External Bandwidth fix*/
rev = get_cpu_rev();
- if (rev == CPU_2420_ES1 || rev == CPU_2422_ES1)
+ if (rev == CPU_2420_ES1 || rev == CPU_2422_ES1){
bug = BIT0;
+ __raw_writel((__raw_readl(SMS_CLASS_ARB0)|BURSTCOMPLETE_GROUP7)
+ ,SMS_CLASS_ARB0);/* enable bust complete for lcd */
+ }
/* enable & load up DLL with good value for 75MHz, and set phase to 90% */
- if (shared) {
+ if (common && (pass_type != IP_SDR)) {
__raw_writel(sdata->sdrc_dlla_ctrl, SDRC_DLLA_CTRL);
__raw_writel(sdata->sdrc_dlla_ctrl & ~(BIT2|bug), SDRC_DLLA_CTRL);
__raw_writel(sdata->sdrc_dllb_ctrl, SDRC_DLLB_CTRL);
__raw_writel(sdata->sdrc_dllb_ctrl & ~(BIT2|bug) , SDRC_DLLB_CTRL);
}
- sdelay(9000);
- if (!first || mem_ok()) /* passed test or 2nd bank init */
- return;
- else {
- first = 0;
- goto men_combo;
- }
-}
+ sdelay(90000);
+ if(mem_ok())
+ return; /* STACKED, other configued type */
+ ++pass_type; /* IPDDR->COMBODDR->IPSDR for CS0 */
+ goto next_mem_type;
+}
/*****************************************************
* gpmc_init(): init gpmc bus
@@ -272,7 +298,11 @@ void gpmc_init(void)
__raw_writel(0x10, GPMC_SYSCONFIG); /* smart idle */
__raw_writel(0x0, GPMC_IRQENABLE); /* isr's sources masked */
__raw_writel(0x1, GPMC_TIMEOUT_CONTROL);/* timeout disable */
+#ifdef CFG_NAND_BOOT
+ __raw_writel(0x001, GPMC_CONFIG); /* set nWP, disable limited addr */
+#else
__raw_writel(0x111, GPMC_CONFIG); /* set nWP, disable limited addr */
+#endif
/* discover bus connection from sysboot */
if (is_gpmc_muxed() == GPMC_MUXED)
@@ -283,11 +313,22 @@ void gpmc_init(void)
/* setup cs0 */
__raw_writel(0x0, GPMC_CONFIG7_0); /* disable current map */
sdelay(1000);
+
+#ifdef CFG_NAND_BOOT
+ __raw_writel(H4_24XX_GPMC_CONFIG1_0|mtype|mwidth, GPMC_CONFIG1_0);
+#else
__raw_writel(H4_24XX_GPMC_CONFIG1_0|mux|mtype|mwidth, GPMC_CONFIG1_0);
- /* __raw_writel(H4_24XX_GPMC_CONFIG2_0, GPMC_CONFIG2_0); */
+#endif
+
+#ifdef PRCM_CONFIG_III
+ __raw_writel(H4_24XX_GPMC_CONFIG2_0, GPMC_CONFIG2_0);
+#endif
__raw_writel(H4_24XX_GPMC_CONFIG3_0, GPMC_CONFIG3_0);
__raw_writel(H4_24XX_GPMC_CONFIG4_0, GPMC_CONFIG4_0);
- /* __raw_writel(H4_24XX_GPMC_CONFIG5_0, GPMC_CONFIG5_0); */
+#ifdef PRCM_CONFIG_III
+ __raw_writel(H4_24XX_GPMC_CONFIG5_0, GPMC_CONFIG5_0);
+ __raw_writel(H4_24XX_GPMC_CONFIG6_0, GPMC_CONFIG6_0);
+#endif
__raw_writel(H4_24XX_GPMC_CONFIG7_0, GPMC_CONFIG7_0);/* enable new mapping */
sdelay(2000);
@@ -303,3 +344,4 @@ void gpmc_init(void)
__raw_writel(H4_24XX_GPMC_CONFIG7_1, GPMC_CONFIG7_1); /* enable mapping */
sdelay(2000);
}
+
generated by cgit v1.1 at 2024-11-10 12:36:48 +0000