OMAP242x H4 board update
- fix for ES2 differences.
- switch to using the cfi_flash driver.
- fix SRAM build address.
- fix for GP device operation.
- unlock SRAM for GP devices.
- display more device information.
- fix potential deadlock in omap24xx_i2c driver.
- fix DLL load values to match dpllout*1 operation.
- fix 2nd chip select init for combo DDR device.
- add support for CFI Intel 28F256L18 on H4 board.
Patch by Richard Woodruff, 03 Mar 2005
diff --git a/board/omap2420h4/mem.c b/board/omap2420h4/mem.c
index 9ae595b..62eb6e3 100644
--- a/board/omap2420h4/mem.c
+++ b/board/omap2420h4/mem.c
@@ -48,7 +48,7 @@
*********************************************************************************/
void prcm_init(void)
{
- u32 rev,div;
+ u32 div;
void (*f_lock_pll) (u32, u32, u32, u32);
extern void *_end_vect, *_start;
@@ -64,11 +64,7 @@
__raw_writel(DSP_DIV, CM_CLKSEL_DSP); /* set dsp and iva dividers */
__raw_writel(GFX_DIV, CM_CLKSEL_GFX); /* set gfx dividers */
- rev = get_cpu_rev();
- if (rev == CPU_2420_ES1 || rev == CPU_2422_ES1)
- div = BUS_DIV_ES1;
- else
- div = BUS_DIV;
+ div = BUS_DIV;
__raw_writel(div, CM_CLKSEL1_CORE);/* set L3/L4/USB/Display/Vlnc/SSi dividers */
sdelay(1000);
@@ -99,6 +95,23 @@
sdelay(1000);
}
+/**************************************************************************
+ * make_cs1_contiguous() - for es2 and above remap cs1 behind cs0 to allow
+ * command line mem=xyz use all memory with out discontigious support
+ * compiled in. Could do it at the ATAG, but there really is two banks...
+ * Called as part of 2nd phase DDR init.
+ **************************************************************************/
+void make_cs1_contiguous(void)
+{
+ u32 size, a_add_low, a_add_high;
+
+ size = get_sdr_cs_size(SDRC_CS0_OSET);
+ size /= SZ_32M; /* find size to offset CS1 */
+ a_add_high = (size & 3) << 8; /* set up low field */
+ a_add_low = (size & 0x3C) >> 2; /* set up high field */
+ __raw_writel((a_add_high|a_add_low),SDRC_CS_CFG);
+
+}
/********************************************************
* mem_ok() - test used to see if timings are correct
@@ -122,6 +135,7 @@
return(1);
}
+
/********************************************************
* sdrc_init() - init the sdrc chip selects CS0 and CS1
* - early init routines, called from flash or
@@ -148,28 +162,29 @@
**************************************************************************/
void do_sdrc_init(u32 offset, u32 early)
{
- u32 cpu, bug=0, rev, common=0, cs0=0, pmask=0, pass_type;
+ u32 cpu, dllen=0, rev, common=0, cs0=0, pmask=0, pass_type, mtype;
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_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
+ H4_2422_SDRC_ACTIM_CTRLB_0, H4_2422_SDRC_RFR_CTRL, H4_2422_SDRC_MR_0_DDR,
+ 0, H4_2422_SDRC_DLLAB_CTRL
};
static const sdrc_data_t sdrc_2420 =
{
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
+ H4_2420_SDRC_RFR_CTRL, H4_2420_SDRC_MR_0_DDR, H4_2420_SDRC_MR_0_SDR,
+ H4_2420_SDRC_DLLAB_CTRL
};
if (offset == SDRC_CS0_OSET)
cs0 = common = 1; /* int regs shared between both chip select */
cpu = get_cpu_type();
+ rev = get_cpu_rev();
/* 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
@@ -197,9 +212,15 @@
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;
- pass_type = COMBO_DDR; /* CS1 config */
+
+ if (!early && (((mtype = get_mem_type()) == DDR_COMBO)||(mtype == DDR_STACKED))) {
+ if(mtype == DDR_COMBO){
+ pmask = BIT2;/* combo part has a shared CKE signal, can't use feature */
+ pass_type = COMBO_DDR; /* CS1 config */
+ __raw_writel((__raw_readl(SDRC_POWER)) & ~pmask, SDRC_POWER);
+ }
+ if(rev != CPU_2420_2422_ES1) /* for es2 and above smooth things out */
+ make_cs1_contiguous();
}
next_mem_type:
@@ -208,11 +229,10 @@
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)) & ~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);
+ __raw_writel((__raw_readl(SDRC_POWER)|BIT6), SDRC_POWER);
#endif
}
@@ -224,15 +244,16 @@
__raw_writel(sdata->sdrc_mdcfg_0_sdr, 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;
- }
+ a = sdata->sdrc_actim_ctrla_0;
+ b = sdata->sdrc_actim_ctrlb_0;
+ r = sdata->sdrc_dllab_ctrl;
+
+ /* work around ES1 DDR issues */
+ if((pass_type != IP_SDR) && (rev == CPU_2420_2422_ES1)){
+ a = H4_242x_SDRC_ACTIM_CTRLA_0_ES1;
+ b = H4_242x_SDRC_ACTIM_CTRLB_0_ES1;
+ r = H4_242x_SDRC_RFR_CTRL_ES1;
+ }
if (cs0) {
__raw_writel(a, SDRC_ACTIM_CTRLA_0);
@@ -241,7 +262,6 @@
__raw_writel(a, SDRC_ACTIM_CTRLA_1);
__raw_writel(b, SDRC_ACTIM_CTRLB_1);
}
-
__raw_writel(r, SDRC_RFR_CTRL+offset);
/* init sequence for mDDR/mSDR using manual commands (DDR is a bit different) */
@@ -263,18 +283,22 @@
__raw_writel(sdata->sdrc_mr_0_ddr, SDRC_MR_0+offset);
/* NOTE: ES1 242x _BUG_ DLL + External Bandwidth fix*/
- rev = get_cpu_rev();
- if (rev == CPU_2420_ES1 || rev == CPU_2422_ES1){
- bug = BIT0;
+ if (rev == CPU_2420_2422_ES1){
+ dllen = (BIT0|BIT3); /* es1 clear both bit0 and bit3 */
__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% */
+ else
+ dllen = BIT0|BIT1; /* es2, clear bit0, and 1 (set phase to 72) */
+
+ /* enable & load up DLL with good value for 75MHz, and set phase to 90
+ * ES1 recommends 90 phase, ES2 recommends 72 phase.
+ */
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);
+ __raw_writel(sdata->sdrc_dllab_ctrl, SDRC_DLLA_CTRL);
+ __raw_writel(sdata->sdrc_dllab_ctrl & ~(BIT2|dllen), SDRC_DLLA_CTRL);
+ __raw_writel(sdata->sdrc_dllab_ctrl, SDRC_DLLB_CTRL);
+ __raw_writel(sdata->sdrc_dllab_ctrl & ~(BIT2|dllen) , SDRC_DLLB_CTRL);
}
sdelay(90000);
@@ -291,12 +315,18 @@
*****************************************************/
void gpmc_init(void)
{
- u32 mux=0, mtype, mwidth;
+ u32 mux=0, mtype, mwidth, rev, tval;
+
+ rev = get_cpu_rev();
+ if (rev == CPU_2420_2422_ES1)
+ tval = 1;
+ else
+ tval = 0; /* disable bit switched meaning */
/* global settings */
__raw_writel(0x10, GPMC_SYSCONFIG); /* smart idle */
__raw_writel(0x0, GPMC_IRQENABLE); /* isr's sources masked */
- __raw_writel(0x1, GPMC_TIMEOUT_CONTROL);/* timeout disable */
+ __raw_writel(tval, GPMC_TIMEOUT_CONTROL);/* timeout disable */
#ifdef CFG_NAND_BOOT
__raw_writel(0x001, GPMC_CONFIG); /* set nWP, disable limited addr */
#else