/* ddr_init() - initializes ddr */
void __ddr_init_samsung(void)
{
u32 ddr_size;
const struct ddr_regs *ddr_regs = 0;
ddr_size = ( get_hwid() & 0x18 ) >> 3;
switch (ddr_size) {
case DDR_SIZE_512MB:
ddr_regs = &ddr_regs_samsung2G_400_mhz;
break;
case DDR_SIZE_1GB:
default:
ddr_regs = &ddr_regs_samsung4G_400_mhz;
}
/*
* DMM Configuration:
* 1GB - 128 byte interleaved
* We also need to make sure the whole 2GB of the DMM are mapped
* to workaround i614.
*/
__raw_writel(0x80640300, DMM_BASE + DMM_LISA_MAP_1);
__raw_writel(0x80760300, DMM_BASE + DMM_LISA_MAP_0);
/* same memory part on both EMIFs */
do_ddr_init(ddr_regs, ddr_regs);
}
/* ddr_init() - initializes ddr */
void __ddr_init_elpida(void)
{
u32 rev,ddr_size;
const struct ddr_regs *ddr_regs = 0;
rev = omap_revision();
ddr_size = ( get_hwid() & 0x18 ) >> 3;
if (rev == OMAP4430_ES1_0)
ddr_regs = &ddr_regs_elpida2G_380_mhz;
else if (rev == OMAP4430_ES2_0)
ddr_regs = &ddr_regs_elpida2G_200_mhz_2cs;
else if (rev >= OMAP4430_ES2_1 && rev < OMAP4470_ES1_0)
ddr_regs = &ddr_regs_elpida2G_400_mhz_2cs;
else if (rev >= OMAP4470_ES1_0)
if (ddr_size == DDR_SIZE_2GB) {
#ifdef CORE_233MHZ
ddr_regs = &ddr_regs_elpida4G_466_mhz_2cs;
#else
ddr_regs = &ddr_regs_elpida4G_400_mhz_2cs;
#endif
} else {
#ifdef CORE_233MHZ
ddr_regs = &ddr_regs_elpida4G_466_mhz_1cs;
#else
ddr_regs = &ddr_regs_elpida4G_400_mhz_1cs;
#endif
}
/*
* DMM DMM_LISA_MAP_i registers fields description
* [31:24] SYS_ADDR
* [22:20] SYS_SIZE
* [19:18] SDRC_INTLDMM
* [17:16] SDRC_ADDRSPC
* [9:8] SDRC_MAP
* [7:0] SDRC_ADDR
*/
/* TI Errata i614 - DMM Hang Issue During Unmapped Accesses
* CRITICALITY: Medium
* REVISIONS IMPACTED: OMAP4430 all
* DESCRIPTION
* DMM replies with an OCP error response in case of unmapped access.
* DMM can generate unmapped access at the end of a mapped section.
* A hang occurs if an unmapped access is issued after a mapped access.
*
* WORKAROUND
* Define LISA section to have response error when unmapped addresses.
* Define LISA section in such a way that all transactions reach the
* EMIF, which will return an error response.
*
* For W/A configure DMM Section 0 size equal to 2048 MB and map it on
* SDRC_ADDRSPC=0, and move original SDRAM configuration
* to section 1 with higher priority.
*
* This W/A has been applied for all OMAP4 CPUs - It doesn't any harm
* on 4460, and even desirable than hitting an un-mapped area in DMM.
* This makes the code simpler and easier to understand and
* the settings will be more uniform.
**/
/* TRAP for catching accesses to the umapped memory */
__raw_writel(0x80720100, DMM_BASE + DMM_LISA_MAP_0);
__raw_writel(0x00000000, DMM_BASE + DMM_LISA_MAP_2);
/* TRAP for catching accesses to the memory actually used by TILER */
__raw_writel(0xFF020100, DMM_BASE + DMM_LISA_MAP_1);
if (rev == OMAP4430_ES1_0)
/* original DMM configuration
* - 512 MB, 128 byte interleaved, EMIF1&2, SDRC_ADDRSPC=0 */
__raw_writel(0x80540300, DMM_BASE + DMM_LISA_MAP_3);
else if (rev < OMAP4460_ES1_0)
/* original DMM configuration
* - 1024 MB, 128 byte interleaved, EMIF1&2, SDRC_ADDRSPC=0 */
__raw_writel(0x80640300, DMM_BASE + DMM_LISA_MAP_3);
else {
/* OMAP4460 and higher: original DMM configuration
* - 1024 MB, 128 byte interleaved, EMIF1&2, SDRC_ADDRSPC=0 */
if (ddr_size == DDR_SIZE_2GB)
__raw_writel(0x80740300, DMM_BASE + DMM_LISA_MAP_3);
else
__raw_writel(0x80640300, DMM_BASE + DMM_LISA_MAP_3);
__raw_writel(0x80720100, MA_BASE + DMM_LISA_MAP_0);
__raw_writel(0xFF020100, MA_BASE + DMM_LISA_MAP_1);
__raw_writel(0x00000000, MA_BASE + DMM_LISA_MAP_2);
if (ddr_size == DDR_SIZE_2GB)
__raw_writel(0x80740300, MA_BASE + DMM_LISA_MAP_3);
else
__raw_writel(0x80640300, MA_BASE + DMM_LISA_MAP_3);
}
/* same memory part on both EMIFs */
do_ddr_init(ddr_regs, ddr_regs);
/* Pull Dn enabled for "Weak driver control" on LPDDR
* Interface.
*/
if (rev >= OMAP4460_ES1_0) {
__raw_writel(0x9c9c9c9c, CONTROL_LPDDR2IO1_0);
__raw_writel(0x9c9c9c9c, CONTROL_LPDDR2IO1_1);
__raw_writel(0x9c989c00, CONTROL_LPDDR2IO1_2);
__raw_writel(0xa0888c03, CONTROL_LPDDR2IO1_3);
__raw_writel(0x9c9c9c9c, CONTROL_LPDDR2IO2_0);
__raw_writel(0x9c9c9c9c, CONTROL_LPDDR2IO2_1);
__raw_writel(0x9c989c00, CONTROL_LPDDR2IO2_2);
__raw_writel(0xa0888c03, CONTROL_LPDDR2IO2_3);
}
#ifdef CORE_233MHZ
/*
* Slew Rate should be set to “FASTEST” and
* Impedance Control to “Drv12”:
* CONTROL_LPDDR2IOx_2[LPDDR2IO1_GR10_SR] = 0
* CONTROL_LPDDR2IOx_2[LPDDR2IO1_GR10_I] = 7
* where x=[1-2]
*/
if (rev >= OMAP4470_ES1_0) {
__raw_writel(0x9c3c9c00, CONTROL_LPDDR2IO1_2);
__raw_writel(0x9c3c9c00, CONTROL_LPDDR2IO2_2);
}
#endif
}
