OMAP3 SDRC: add support for 2 SDRAM chip selects

Some OMAP3 boards (Beagle Cx, Overo, RX51, Pandora) have 2
SDRAM parts connected to the SDRC.

This patch adds the following:
- add a new argument of type omap_sdrc_params struct*
to omap2_init_common_hw and omap2_sdrc_init for the 2nd CS params
- adapted the OMAP boards files to the new prototype of
omap2_init_common_hw
- add the SDRC 2nd CS registers offsets defines
- adapt the sram sleep code to configure the SDRC for the 2nd CS

Note: If the 2nd param to omap2_init_common_hw is NULL, then the
parameters are not programmed into the SDRC CS1 registers

Tested on 3430 SDP and Beagleboard rev C2 and B5, with
suspend/resume and frequency changes (cpufreq).

Signed-off-by: Jean Pihet <jpihet@mvista.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>

21 files changed, 236 insertions, 102 deletions

diff --git a/arch/arm/mach-omap2/board-2430sdp.c b/arch/arm/mach-omap2/board-2430sdp.c
index 9c3fdcdf76c3..8ec2a132904d 100644
--- a/arch/arm/mach-omap2/board-2430sdp.c
+++ b/arch/arm/mach-omap2/board-2430sdp.c
@@ -141,7 +141,7 @@ static inline void board_smc91x_init(void)
 
 static void __init omap_2430sdp_init_irq(void)
 {
-        omap2_init_common_hw(NULL);
+        omap2_init_common_hw(NULL, NULL);
         omap_init_irq();
         omap_gpio_init();
 }
diff --git a/arch/arm/mach-omap2/board-3430sdp.c b/arch/arm/mach-omap2/board-3430sdp.c
index 496a90e4ea7a..ac262cd74503 100644
--- a/arch/arm/mach-omap2/board-3430sdp.c
+++ b/arch/arm/mach-omap2/board-3430sdp.c
@@ -169,7 +169,7 @@ static struct platform_device *sdp3430_devices[] __initdata = {
 
 static void __init omap_3430sdp_init_irq(void)
 {
-        omap2_init_common_hw(hyb18m512160af6_sdrc_params);
+        omap2_init_common_hw(hyb18m512160af6_sdrc_params, NULL);
         omap_init_irq();
         omap_gpio_init();
 }
diff --git a/arch/arm/mach-omap2/board-4430sdp.c b/arch/arm/mach-omap2/board-4430sdp.c
index 57e477bd89c6..b0c7402248f7 100644
--- a/arch/arm/mach-omap2/board-4430sdp.c
+++ b/arch/arm/mach-omap2/board-4430sdp.c
@@ -59,7 +59,7 @@ static void __init gic_init_irq(void)
 
 static void __init omap_4430sdp_init_irq(void)
 {
-        omap2_init_common_hw(NULL);
+        omap2_init_common_hw(NULL, NULL);
 #ifdef CONFIG_OMAP_32K_TIMER
         omap2_gp_clockevent_set_gptimer(1);
 #endif
diff --git a/arch/arm/mach-omap2/board-apollon.c b/arch/arm/mach-omap2/board-apollon.c
index 06dfba888b0c..dcfc20d03894 100644
--- a/arch/arm/mach-omap2/board-apollon.c
+++ b/arch/arm/mach-omap2/board-apollon.c
@@ -250,7 +250,7 @@ out:
 
 static void __init omap_apollon_init_irq(void)
 {
-        omap2_init_common_hw(NULL);
+        omap2_init_common_hw(NULL, NULL);
         omap_init_irq();
         omap_gpio_init();
         apollon_init_smc91x();
diff --git a/arch/arm/mach-omap2/board-generic.c b/arch/arm/mach-omap2/board-generic.c
index 3492162a65c3..fd00aa03690c 100644
--- a/arch/arm/mach-omap2/board-generic.c
+++ b/arch/arm/mach-omap2/board-generic.c
@@ -33,7 +33,7 @@
 
 static void __init omap_generic_init_irq(void)
 {
-        omap2_init_common_hw(NULL);
+        omap2_init_common_hw(NULL, NULL);
         omap_init_irq();
 }
 
diff --git a/arch/arm/mach-omap2/board-h4.c b/arch/arm/mach-omap2/board-h4.c
index e7d017cdc438..7b1d61d5bb2c 100644
--- a/arch/arm/mach-omap2/board-h4.c
+++ b/arch/arm/mach-omap2/board-h4.c
@@ -270,7 +270,7 @@ static void __init h4_init_flash(void)
 
 static void __init omap_h4_init_irq(void)
 {
-        omap2_init_common_hw(NULL);
+        omap2_init_common_hw(NULL, NULL);
         omap_init_irq();
         omap_gpio_init();
         h4_init_flash();
diff --git a/arch/arm/mach-omap2/board-ldp.c b/arch/arm/mach-omap2/board-ldp.c
index d8bc0a7dcb8d..ea383f88cb1b 100644
--- a/arch/arm/mach-omap2/board-ldp.c
+++ b/arch/arm/mach-omap2/board-ldp.c
@@ -270,7 +270,7 @@ static inline void __init ldp_init_smsc911x(void)
 
 static void __init omap_ldp_init_irq(void)
 {
-        omap2_init_common_hw(NULL);
+        omap2_init_common_hw(NULL, NULL);
         omap_init_irq();
         omap_gpio_init();
         ldp_init_smsc911x();
diff --git a/arch/arm/mach-omap2/board-omap3beagle.c b/arch/arm/mach-omap2/board-omap3beagle.c
index 991ac9c38032..4abefd9566e8 100644
--- a/arch/arm/mach-omap2/board-omap3beagle.c
+++ b/arch/arm/mach-omap2/board-omap3beagle.c
@@ -282,7 +282,8 @@ static int __init omap3_beagle_i2c_init(void)
 
 static void __init omap3_beagle_init_irq(void)
 {
-        omap2_init_common_hw(mt46h32m32lf6_sdrc_params);
+        omap2_init_common_hw(mt46h32m32lf6_sdrc_params,
+                             mt46h32m32lf6_sdrc_params);
         omap_init_irq();
 #ifdef CONFIG_OMAP_32K_TIMER
         omap2_gp_clockevent_set_gptimer(12);
diff --git a/arch/arm/mach-omap2/board-omap3evm.c b/arch/arm/mach-omap2/board-omap3evm.c
index d3cc145814d0..217e5a2861d3 100644
--- a/arch/arm/mach-omap2/board-omap3evm.c
+++ b/arch/arm/mach-omap2/board-omap3evm.c
@@ -279,7 +279,7 @@ struct spi_board_info omap3evm_spi_board_info[] = {
 
 static void __init omap3_evm_init_irq(void)
 {
-        omap2_init_common_hw(mt46h32m32lf6_sdrc_params);
+        omap2_init_common_hw(mt46h32m32lf6_sdrc_params, NULL);
         omap_init_irq();
         omap_gpio_init();
         omap3evm_init_smc911x();
diff --git a/arch/arm/mach-omap2/board-omap3pandora.c b/arch/arm/mach-omap2/board-omap3pandora.c
index e32aa23ce962..9b991ced3822 100644
--- a/arch/arm/mach-omap2/board-omap3pandora.c
+++ b/arch/arm/mach-omap2/board-omap3pandora.c
@@ -310,7 +310,8 @@ static int __init omap3pandora_i2c_init(void)
 
 static void __init omap3pandora_init_irq(void)
 {
-        omap2_init_common_hw(mt46h32m32lf6_sdrc_params);
+        omap2_init_common_hw(mt46h32m32lf6_sdrc_params,
+                             mt46h32m32lf6_sdrc_params);
         omap_init_irq();
         omap_gpio_init();
 }
diff --git a/arch/arm/mach-omap2/board-overo.c b/arch/arm/mach-omap2/board-overo.c
index dff5528fbfb5..44bc1c54cd03 100644
--- a/arch/arm/mach-omap2/board-overo.c
+++ b/arch/arm/mach-omap2/board-overo.c
@@ -360,7 +360,8 @@ static int __init overo_i2c_init(void)
 
 static void __init overo_init_irq(void)
 {
-        omap2_init_common_hw(mt46h32m32lf6_sdrc_params);
+        omap2_init_common_hw(mt46h32m32lf6_sdrc_params,
+                             mt46h32m32lf6_sdrc_params);
         omap_init_irq();
         omap_gpio_init();
 }
diff --git a/arch/arm/mach-omap2/board-rx51.c b/arch/arm/mach-omap2/board-rx51.c
index 374ff63c3eb2..591ae8a58054 100644
--- a/arch/arm/mach-omap2/board-rx51.c
+++ b/arch/arm/mach-omap2/board-rx51.c
@@ -61,7 +61,7 @@ static struct omap_board_config_kernel rx51_config[] = {
 
 static void __init rx51_init_irq(void)
 {
-        omap2_init_common_hw(NULL);
+        omap2_init_common_hw(NULL, NULL);
         omap_init_irq();
         omap_gpio_init();
 }
diff --git a/arch/arm/mach-omap2/board-zoom2.c b/arch/arm/mach-omap2/board-zoom2.c
index bcc0f7632dea..427b7b8b1237 100644
--- a/arch/arm/mach-omap2/board-zoom2.c
+++ b/arch/arm/mach-omap2/board-zoom2.c
@@ -25,7 +25,7 @@
 
 static void __init omap_zoom2_init_irq(void)
 {
-        omap2_init_common_hw(NULL);
+        omap2_init_common_hw(NULL, NULL);
         omap_init_irq();
         omap_gpio_init();
 }
diff --git a/arch/arm/mach-omap2/clock34xx.c b/arch/arm/mach-omap2/clock34xx.c
index 045da923e75b..1c6480d3ad62 100644
--- a/arch/arm/mach-omap2/clock34xx.c
+++ b/arch/arm/mach-omap2/clock34xx.c
@@ -725,7 +725,9 @@ static int omap3_core_dpll_m2_set_rate(struct clk *clk, unsigned long rate)
         u32 unlock_dll = 0;
         u32 c;
         unsigned long validrate, sdrcrate, mpurate;
-        struct omap_sdrc_params *sp;
+        struct omap_sdrc_params *sdrc_cs0;
+        struct omap_sdrc_params *sdrc_cs1;
+        int ret;
 
         if (!clk || !rate)
                 return -EINVAL;
@@ -743,8 +745,8 @@ static int omap3_core_dpll_m2_set_rate(struct clk *clk, unsigned long rate)
         else
                 sdrcrate >>= ((clk->rate / rate) >> 1);
 
-        sp = omap2_sdrc_get_params(sdrcrate);
-        if (!sp)
+        ret = omap2_sdrc_get_params(sdrcrate, &sdrc_cs0, &sdrc_cs1);
+        if (ret)
                 return -EINVAL;
 
         if (sdrcrate < MIN_SDRC_DLL_LOCK_FREQ) {
@@ -765,12 +767,29 @@ static int omap3_core_dpll_m2_set_rate(struct clk *clk, unsigned long rate)
 
         pr_debug("clock: changing CORE DPLL rate from %lu to %lu\n", clk->rate,
                  validrate);
-        pr_debug("clock: SDRC timing params used: %08x %08x %08x\n",
-                 sp->rfr_ctrl, sp->actim_ctrla, sp->actim_ctrlb);
-
-        omap3_configure_core_dpll(sp->rfr_ctrl, sp->actim_ctrla,
-                                  sp->actim_ctrlb, new_div, unlock_dll, c,
-                                  sp->mr, rate > clk->rate);
+        pr_debug("clock: SDRC CS0 timing params used:"
+                 " RFR %08x CTRLA %08x CTRLB %08x MR %08x\n",
+                 sdrc_cs0->rfr_ctrl, sdrc_cs0->actim_ctrla,
+                 sdrc_cs0->actim_ctrlb, sdrc_cs0->mr);
+        if (sdrc_cs1)
+                pr_debug("clock: SDRC CS1 timing params used: "
+                 " RFR %08x CTRLA %08x CTRLB %08x MR %08x\n",
+                 sdrc_cs1->rfr_ctrl, sdrc_cs1->actim_ctrla,
+                 sdrc_cs1->actim_ctrlb, sdrc_cs1->mr);
+
+        if (sdrc_cs1)
+                omap3_configure_core_dpll(
+                                  new_div, unlock_dll, c, rate > clk->rate,
+                                  sdrc_cs0->rfr_ctrl, sdrc_cs0->actim_ctrla,
+                                  sdrc_cs0->actim_ctrlb, sdrc_cs0->mr,
+                                  sdrc_cs1->rfr_ctrl, sdrc_cs1->actim_ctrla,
+                                  sdrc_cs1->actim_ctrlb, sdrc_cs1->mr);
+        else
+                omap3_configure_core_dpll(
+                                  new_div, unlock_dll, c, rate > clk->rate,
+                                  sdrc_cs0->rfr_ctrl, sdrc_cs0->actim_ctrla,
+                                  sdrc_cs0->actim_ctrlb, sdrc_cs0->mr,
+                                  0, 0, 0, 0);
 
         return 0;
 }
diff --git a/arch/arm/mach-omap2/io.c b/arch/arm/mach-omap2/io.c
index 3a86b0f66031..e9b9bcb19b4e 100644
--- a/arch/arm/mach-omap2/io.c
+++ b/arch/arm/mach-omap2/io.c
@@ -276,14 +276,15 @@ static int __init _omap2_init_reprogram_sdrc(void)
         return v;
 }
 
-void __init omap2_init_common_hw(struct omap_sdrc_params *sp)
+void __init omap2_init_common_hw(struct omap_sdrc_params *sdrc_cs0,
+                                 struct omap_sdrc_params *sdrc_cs1)
 {
         omap2_mux_init();
 #ifndef CONFIG_ARCH_OMAP4 /* FIXME: Remove this once the clkdev is ready */
         pwrdm_init(powerdomains_omap);
         clkdm_init(clockdomains_omap, clkdm_pwrdm_autodeps);
         omap2_clk_init();
-        omap2_sdrc_init(sp);
+        omap2_sdrc_init(sdrc_cs0, sdrc_cs1);
         _omap2_init_reprogram_sdrc();
 #endif
         gpmc_init();
diff --git a/arch/arm/mach-omap2/sdrc.c b/arch/arm/mach-omap2/sdrc.c
index 2045441e8385..2e9e38db30e9 100644
--- a/arch/arm/mach-omap2/sdrc.c
+++ b/arch/arm/mach-omap2/sdrc.c
@@ -32,7 +32,7 @@
 #include <mach/sdrc.h>
 #include "sdrc.h"
 
-static struct omap_sdrc_params *sdrc_init_params;
+static struct omap_sdrc_params *sdrc_init_params_cs0, *sdrc_init_params_cs1;
 
 void __iomem *omap2_sdrc_base;
 void __iomem *omap2_sms_base;
@@ -45,33 +45,49 @@ void __iomem *omap2_sms_base;
 /**
  * omap2_sdrc_get_params - return SDRC register values for a given clock rate
  * @r: SDRC clock rate (in Hz)
+ * @sdrc_cs0: chip select 0 ram timings **
+ * @sdrc_cs1: chip select 1 ram timings **
  *
  * Return pre-calculated values for the SDRC_ACTIM_CTRLA,
- * SDRC_ACTIM_CTRLB, SDRC_RFR_CTRL, and SDRC_MR registers, for a given
- * SDRC clock rate 'r'.  These parameters control various timing
- * delays in the SDRAM controller that are expressed in terms of the
- * number of SDRC clock cycles to wait; hence the clock rate
- * dependency. Note that sdrc_init_params must be sorted rate
- * descending.  Also assumes that both chip-selects use the same
- * timing parameters.  Returns a struct omap_sdrc_params * upon
- * success, or NULL upon failure.
+ *  SDRC_ACTIM_CTRLB, SDRC_RFR_CTRL and SDRC_MR registers in sdrc_cs[01]
+ *  structs,for a given SDRC clock rate 'r'.
+ * These parameters control various timing delays in the SDRAM controller
+ *  that are expressed in terms of the number of SDRC clock cycles to
+ *  wait; hence the clock rate dependency.
+ *
+ * Supports 2 different timing parameters for both chip selects.
+ *
+ * Note 1: the sdrc_init_params_cs[01] must be sorted rate descending.
+ * Note 2: If sdrc_init_params_cs_1 is not NULL it must be of same size
+ *  as sdrc_init_params_cs_0.
+ *
+ * Fills in the struct omap_sdrc_params * for each chip select.
+ * Returns 0 upon success or -1 upon failure.
  */
-struct omap_sdrc_params *omap2_sdrc_get_params(unsigned long r)
+int omap2_sdrc_get_params(unsigned long r,
+                          struct omap_sdrc_params **sdrc_cs0,
+                          struct omap_sdrc_params **sdrc_cs1)
 {
-        struct omap_sdrc_params *sp;
+        struct omap_sdrc_params *sp0, *sp1;
 
-        if (!sdrc_init_params)
-                return NULL;
+        if (!sdrc_init_params_cs0)
+                return -1;
 
-        sp = sdrc_init_params;
+        sp0 = sdrc_init_params_cs0;
+        sp1 = sdrc_init_params_cs1;
 
-        while (sp->rate && sp->rate != r)
-                sp++;
+        while (sp0->rate && sp0->rate != r) {
+                sp0++;
+                if (sdrc_init_params_cs1)
+                        sp1++;
+        }
 
-        if (!sp->rate)
-                return NULL;
+        if (!sp0->rate)
+                return -1;
 
-        return sp;
+        *sdrc_cs0 = sp0;
+        *sdrc_cs1 = sp1;
+        return 0;
 }
 
 
@@ -83,13 +99,15 @@ void __init omap2_set_globals_sdrc(struct omap_globals *omap2_globals)
 
 /**
  * omap2_sdrc_init - initialize SMS, SDRC devices on boot
- * @sp: pointer to a null-terminated list of struct omap_sdrc_params
+ * @sdrc_cs[01]: pointers to a null-terminated list of struct omap_sdrc_params
+ *  Support for 2 chip selects timings
  *
  * Turn on smart idle modes for SDRAM scheduler and controller.
  * Program a known-good configuration for the SDRC to deal with buggy
  * bootloaders.
  */
-void __init omap2_sdrc_init(struct omap_sdrc_params *sp)
+void __init omap2_sdrc_init(struct omap_sdrc_params *sdrc_cs0,
+                            struct omap_sdrc_params *sdrc_cs1)
 {
         u32 l;
 
@@ -103,7 +121,8 @@ void __init omap2_sdrc_init(struct omap_sdrc_params *sp)
         l |= (0x2 << 3);
         sdrc_write_reg(l, SDRC_SYSCONFIG);
 
-        sdrc_init_params = sp;
+        sdrc_init_params_cs0 = sdrc_cs0;
+        sdrc_init_params_cs1 = sdrc_cs1;
 
         /* XXX Enable SRFRONIDLEREQ here also? */
         l = (1 << SDRC_POWER_EXTCLKDIS_SHIFT) |
diff --git a/arch/arm/mach-omap2/sram34xx.S b/arch/arm/mach-omap2/sram34xx.S
index f41f8d96ddba..3aef7448b2a5 100644
--- a/arch/arm/mach-omap2/sram34xx.S
+++ b/arch/arm/mach-omap2/sram34xx.S
@@ -36,7 +36,7 @@
 
         .text
 
-/* r4 parameters */
+/* r1 parameters */
 #define SDRC_NO_UNLOCK_DLL              0x0
 #define SDRC_UNLOCK_DLL                 0x1
 
@@ -71,40 +71,71 @@
 
 /*
  * omap3_sram_configure_core_dpll - change DPLL3 M2 divider
- * r0 = new SDRC_RFR_CTRL register contents
- * r1 = new SDRC_ACTIM_CTRLA register contents
- * r2 = new SDRC_ACTIM_CTRLB register contents
- * r3 = new M2 divider setting (only 1 and 2 supported right now)
- * r4 = unlock SDRC DLL? (1 = yes, 0 = no).  Only unlock DLL for
+ *
+ * Params passed in registers:
+ *  r0 = new M2 divider setting (only 1 and 2 supported right now)
+ *  r1 = unlock SDRC DLL? (1 = yes, 0 = no).  Only unlock DLL for
  *      SDRC rates < 83MHz
- * r5 = number of MPU cycles to wait for SDRC to stabilize after
+ *  r2 = number of MPU cycles to wait for SDRC to stabilize after
  *      reprogramming the SDRC when switching to a slower MPU speed
- * r6 = new SDRC_MR_0 register value
- * r7 = increasing SDRC rate? (1 = yes, 0 = no)
+ *  r3 = increasing SDRC rate? (1 = yes, 0 = no)
+ *
+ * Params passed via the stack. The needed params will be copied in SRAM
+ *  before use by the code in SRAM (SDRAM is not accessible during SDRC
+ *  reconfiguration):
+ *  new SDRC_RFR_CTRL_0 register contents
+ *  new SDRC_ACTIM_CTRL_A_0 register contents
+ *  new SDRC_ACTIM_CTRL_B_0 register contents
+ *  new SDRC_MR_0 register value
+ *  new SDRC_RFR_CTRL_1 register contents
+ *  new SDRC_ACTIM_CTRL_A_1 register contents
+ *  new SDRC_ACTIM_CTRL_B_1 register contents
+ *  new SDRC_MR_1 register value
  *
+ * If the param SDRC_RFR_CTRL_1 is 0, the parameters
+ *  are not programmed into the SDRC CS1 registers
  */
 ENTRY(omap3_sram_configure_core_dpll)
         stmfd   sp!, {r1-r12, lr}       @ store regs to stack
-        ldr     r4, [sp, #52]           @ pull extra args off the stack
-        ldr     r5, [sp, #56]           @ load extra args from the stack
-        ldr     r6, [sp, #60]           @ load extra args from the stack
-        ldr     r7, [sp, #64]           @ load extra args from the stack
+
+                                        @ pull the extra args off the stack
+                                        @  and store them in SRAM
+        ldr     r4, [sp, #52]
+        str     r4, omap_sdrc_rfr_ctrl_0_val
+        ldr     r4, [sp, #56]
+        str     r4, omap_sdrc_actim_ctrl_a_0_val
+        ldr     r4, [sp, #60]
+        str     r4, omap_sdrc_actim_ctrl_b_0_val
+        ldr     r4, [sp, #64]
+        str     r4, omap_sdrc_mr_0_val
+        ldr     r4, [sp, #68]
+        str     r4, omap_sdrc_rfr_ctrl_1_val
+        cmp     r4, #0                  @ if SDRC_RFR_CTRL_1 is 0,
+        beq     skip_cs1_params         @  do not use cs1 params
+        ldr     r4, [sp, #72]
+        str     r4, omap_sdrc_actim_ctrl_a_1_val
+        ldr     r4, [sp, #76]
+        str     r4, omap_sdrc_actim_ctrl_b_1_val
+        ldr     r4, [sp, #80]
+        str     r4, omap_sdrc_mr_1_val
+skip_cs1_params:
         dsb                             @ flush buffered writes to interconnect
-        cmp     r7, #1                  @ if increasing SDRC clk rate,
+
+        cmp     r3, #1                  @ if increasing SDRC clk rate,
         bleq    configure_sdrc          @ program the SDRC regs early (for RFR)
-        cmp     r4, #SDRC_UNLOCK_DLL    @ set the intended DLL state
+        cmp     r1, #SDRC_UNLOCK_DLL    @ set the intended DLL state
         bleq    unlock_dll
         blne    lock_dll
         bl      sdram_in_selfrefresh    @ put SDRAM in self refresh, idle SDRC
         bl      configure_core_dpll     @ change the DPLL3 M2 divider
         bl      enable_sdrc             @ take SDRC out of idle
-        cmp     r4, #SDRC_UNLOCK_DLL    @ wait for DLL status to change
+        cmp     r1, #SDRC_UNLOCK_DLL    @ wait for DLL status to change
         bleq    wait_dll_unlock
         blne    wait_dll_lock
-        cmp     r7, #1                  @ if increasing SDRC clk rate,
+        cmp     r3, #1                  @ if increasing SDRC clk rate,
         beq     return_to_sdram         @ return to SDRAM code, otherwise,
         bl      configure_sdrc          @ reprogram SDRC regs now
-        mov     r12, r5
+        mov     r12, r2
         bl      wait_clk_stable         @ wait for SDRC to stabilize
 return_to_sdram:
         isb                             @ prevent speculative exec past here
@@ -149,7 +180,7 @@ configure_core_dpll:
         ldr     r12, [r11]
         ldr     r10, core_m2_mask_val   @ modify m2 for core dpll
         and     r12, r12, r10
-        orr     r12, r12, r3, lsl #CORE_DPLL_CLKOUT_DIV_SHIFT
+        orr     r12, r12, r0, lsl #CORE_DPLL_CLKOUT_DIV_SHIFT
         str     r12, [r11]
         ldr     r12, [r11]              @ posted-write barrier for CM
         bx      lr
@@ -187,15 +218,34 @@ wait_dll_unlock:
         bne     wait_dll_unlock
         bx      lr
 configure_sdrc:
-        ldr     r11, omap3_sdrc_rfr_ctrl
-        str     r0, [r11]
-        ldr     r11, omap3_sdrc_actim_ctrla
-        str     r1, [r11]
-        ldr     r11, omap3_sdrc_actim_ctrlb
-        str     r2, [r11]
+        ldr     r12, omap_sdrc_rfr_ctrl_0_val   @ fetch value from SRAM
+        ldr     r11, omap3_sdrc_rfr_ctrl_0      @ fetch addr from SRAM
+        str     r12, [r11]                      @ store
+        ldr     r12, omap_sdrc_actim_ctrl_a_0_val
+        ldr     r11, omap3_sdrc_actim_ctrl_a_0
+        str     r12, [r11]
+        ldr     r12, omap_sdrc_actim_ctrl_b_0_val
+        ldr     r11, omap3_sdrc_actim_ctrl_b_0
+        str     r12, [r11]
+        ldr     r12, omap_sdrc_mr_0_val
         ldr     r11, omap3_sdrc_mr_0
-        str     r6, [r11]
-        ldr     r6, [r11]               @ posted-write barrier for SDRC
+        str     r12, [r11]
+        ldr     r12, omap_sdrc_rfr_ctrl_1_val
+        cmp     r12, #0                 @ if SDRC_RFR_CTRL_1 is 0,
+        beq     skip_cs1_prog           @  do not program cs1 params
+        ldr     r11, omap3_sdrc_rfr_ctrl_1
+        str     r12, [r11]
+        ldr     r12, omap_sdrc_actim_ctrl_a_1_val
+        ldr     r11, omap3_sdrc_actim_ctrl_a_1
+        str     r12, [r11]
+        ldr     r12, omap_sdrc_actim_ctrl_b_1_val
+        ldr     r11, omap3_sdrc_actim_ctrl_b_1
+        str     r12, [r11]
+        ldr     r12, omap_sdrc_mr_1_val
+        ldr     r11, omap3_sdrc_mr_1
+        str     r12, [r11]
+skip_cs1_prog:
+        ldr     r12, [r11]              @ posted-write barrier for SDRC
         bx      lr
 
 omap3_sdrc_power:
@@ -206,14 +256,40 @@ omap3_cm_idlest1_core:
         .word OMAP34XX_CM_REGADDR(CORE_MOD, CM_IDLEST)
 omap3_cm_iclken1_core:
         .word OMAP34XX_CM_REGADDR(CORE_MOD, CM_ICLKEN1)
-omap3_sdrc_rfr_ctrl:
+
+omap3_sdrc_rfr_ctrl_0:
         .word OMAP34XX_SDRC_REGADDR(SDRC_RFR_CTRL_0)
-omap3_sdrc_actim_ctrla:
+omap3_sdrc_rfr_ctrl_1:
+        .word OMAP34XX_SDRC_REGADDR(SDRC_RFR_CTRL_1)
+omap3_sdrc_actim_ctrl_a_0:
         .word OMAP34XX_SDRC_REGADDR(SDRC_ACTIM_CTRL_A_0)
-omap3_sdrc_actim_ctrlb:
+omap3_sdrc_actim_ctrl_a_1:
+        .word OMAP34XX_SDRC_REGADDR(SDRC_ACTIM_CTRL_A_1)
+omap3_sdrc_actim_ctrl_b_0:
         .word OMAP34XX_SDRC_REGADDR(SDRC_ACTIM_CTRL_B_0)
+omap3_sdrc_actim_ctrl_b_1:
+        .word OMAP34XX_SDRC_REGADDR(SDRC_ACTIM_CTRL_B_1)
 omap3_sdrc_mr_0:
         .word OMAP34XX_SDRC_REGADDR(SDRC_MR_0)
+omap3_sdrc_mr_1:
+        .word OMAP34XX_SDRC_REGADDR(SDRC_MR_1)
+omap_sdrc_rfr_ctrl_0_val:
+        .word 0xDEADBEEF
+omap_sdrc_rfr_ctrl_1_val:
+        .word 0xDEADBEEF
+omap_sdrc_actim_ctrl_a_0_val:
+        .word 0xDEADBEEF
+omap_sdrc_actim_ctrl_a_1_val:
+        .word 0xDEADBEEF
+omap_sdrc_actim_ctrl_b_0_val:
+        .word 0xDEADBEEF
+omap_sdrc_actim_ctrl_b_1_val:
+        .word 0xDEADBEEF
+omap_sdrc_mr_0_val:
+        .word 0xDEADBEEF
+omap_sdrc_mr_1_val:
+        .word 0xDEADBEEF
+
 omap3_sdrc_dlla_status:
         .word OMAP34XX_SDRC_REGADDR(SDRC_DLLA_STATUS)
 omap3_sdrc_dlla_ctrl:
@@ -223,3 +299,4 @@ core_m2_mask_val:
 
 ENTRY(omap3_sram_configure_core_dpll_sz)
         .word   . - omap3_sram_configure_core_dpll
+
diff --git a/arch/arm/plat-omap/include/mach/io.h b/arch/arm/plat-omap/include/mach/io.h
index 73f483d56ca6..21fb0efdda86 100644
--- a/arch/arm/plat-omap/include/mach/io.h
+++ b/arch/arm/plat-omap/include/mach/io.h
@@ -228,7 +228,8 @@ extern void omap1_map_common_io(void);
 extern void omap1_init_common_hw(void);
 
 extern void omap2_map_common_io(void);
-extern void omap2_init_common_hw(struct omap_sdrc_params *sp);
+extern void omap2_init_common_hw(struct omap_sdrc_params *sdrc_cs0,
+                                 struct omap_sdrc_params *sdrc_cs1);
 
 #define __arch_ioremap(p,s,t)   omap_ioremap(p,s,t)
 #define __arch_iounmap(v)       omap_iounmap(v)
diff --git a/arch/arm/plat-omap/include/mach/sdrc.h b/arch/arm/plat-omap/include/mach/sdrc.h
index adc73522491f..0be18e4ff182 100644
--- a/arch/arm/plat-omap/include/mach/sdrc.h
+++ b/arch/arm/plat-omap/include/mach/sdrc.h
@@ -30,6 +30,10 @@
 #define SDRC_ACTIM_CTRL_A_0     0x09c
 #define SDRC_ACTIM_CTRL_B_0     0x0a0
 #define SDRC_RFR_CTRL_0         0x0a4
+#define SDRC_MR_1               0x0B4
+#define SDRC_ACTIM_CTRL_A_1     0x0C4
+#define SDRC_ACTIM_CTRL_B_1     0x0C8
+#define SDRC_RFR_CTRL_1         0x0D4
 
 /*
  * These values represent the number of memory clock cycles between
@@ -102,8 +106,11 @@ struct omap_sdrc_params {
         u32 mr;
 };
 
-void __init omap2_sdrc_init(struct omap_sdrc_params *sp);
-struct omap_sdrc_params *omap2_sdrc_get_params(unsigned long r);
+void __init omap2_sdrc_init(struct omap_sdrc_params *sdrc_cs0,
+                            struct omap_sdrc_params *sdrc_cs1);
+int omap2_sdrc_get_params(unsigned long r,
+                          struct omap_sdrc_params **sdrc_cs0,
+                          struct omap_sdrc_params **sdrc_cs1);
 
 #ifdef CONFIG_ARCH_OMAP2
 
diff --git a/arch/arm/plat-omap/include/mach/sram.h b/arch/arm/plat-omap/include/mach/sram.h
index 4d53cc59d7a3..8974e3fc2691 100644
--- a/arch/arm/plat-omap/include/mach/sram.h
+++ b/arch/arm/plat-omap/include/mach/sram.h
@@ -21,11 +21,12 @@ extern void omap2_sram_reprogram_sdrc(u32 perf_level, u32 dll_val,
                                       u32 mem_type);
 extern u32 omap2_set_prcm(u32 dpll_ctrl_val, u32 sdrc_rfr_val, int bypass);
 
-extern u32 omap3_configure_core_dpll(u32 sdrc_rfr_ctrl,
-                                     u32 sdrc_actim_ctrla,
-                                     u32 sdrc_actim_ctrlb, u32 m2,
-                                     u32 unlock_dll, u32 f, u32 sdrc_mr,
-                                     u32 inc);
+extern u32 omap3_configure_core_dpll(
+                        u32 m2, u32 unlock_dll, u32 f, u32 inc,
+                        u32 sdrc_rfr_ctrl_0, u32 sdrc_actim_ctrl_a_0,
+                        u32 sdrc_actim_ctrl_b_0, u32 sdrc_mr_0,
+                        u32 sdrc_rfr_ctrl_1, u32 sdrc_actim_ctrl_a_1,
+                        u32 sdrc_actim_ctrl_b_1, u32 sdrc_mr_1);
 
 /* Do not use these */
 extern void omap1_sram_reprogram_clock(u32 ckctl, u32 dpllctl);
@@ -59,12 +60,12 @@ extern void omap243x_sram_reprogram_sdrc(u32 perf_level, u32 dll_val,
                                                 u32 mem_type);
 extern unsigned long omap243x_sram_reprogram_sdrc_sz;
 
-
-extern u32 omap3_sram_configure_core_dpll(u32 sdrc_rfr_ctrl,
-                                          u32 sdrc_actim_ctrla,
-                                          u32 sdrc_actim_ctrlb, u32 m2,
-                                          u32 unlock_dll, u32 f, u32 sdrc_mr,
-                                          u32 inc);
+extern u32 omap3_sram_configure_core_dpll(
+                        u32 m2, u32 unlock_dll, u32 f, u32 inc,
+                        u32 sdrc_rfr_ctrl_0, u32 sdrc_actim_ctrl_a_0,
+                        u32 sdrc_actim_ctrl_b_0, u32 sdrc_mr_0,
+                        u32 sdrc_rfr_ctrl_1, u32 sdrc_actim_ctrl_a_1,
+                        u32 sdrc_actim_ctrl_b_1, u32 sdrc_mr_1);
 extern unsigned long omap3_sram_configure_core_dpll_sz;
 
 #endif
diff --git a/arch/arm/plat-omap/sram.c b/arch/arm/plat-omap/sram.c
index 4ea73804d21e..4e781c99f0eb 100644
--- a/arch/arm/plat-omap/sram.c
+++ b/arch/arm/plat-omap/sram.c
@@ -373,20 +373,26 @@ static inline int omap243x_sram_init(void)
 
 #ifdef CONFIG_ARCH_OMAP3
 
-static u32 (*_omap3_sram_configure_core_dpll)(u32 sdrc_rfr_ctrl,
-                                              u32 sdrc_actim_ctrla,
-                                              u32 sdrc_actim_ctrlb,
-                                              u32 m2, u32 unlock_dll,
-                                              u32 f, u32 sdrc_mr, u32 inc);
-u32 omap3_configure_core_dpll(u32 sdrc_rfr_ctrl, u32 sdrc_actim_ctrla,
-                              u32 sdrc_actim_ctrlb, u32 m2, u32 unlock_dll,
-                              u32 f, u32 sdrc_mr, u32 inc)
+static u32 (*_omap3_sram_configure_core_dpll)(
+                        u32 m2, u32 unlock_dll, u32 f, u32 inc,
+                        u32 sdrc_rfr_ctrl_0, u32 sdrc_actim_ctrl_a_0,
+                        u32 sdrc_actim_ctrl_b_0, u32 sdrc_mr_0,
+                        u32 sdrc_rfr_ctrl_1, u32 sdrc_actim_ctrl_a_1,
+                        u32 sdrc_actim_ctrl_b_1, u32 sdrc_mr_1);
+
+u32 omap3_configure_core_dpll(u32 m2, u32 unlock_dll, u32 f, u32 inc,
+                        u32 sdrc_rfr_ctrl_0, u32 sdrc_actim_ctrl_a_0,
+                        u32 sdrc_actim_ctrl_b_0, u32 sdrc_mr_0,
+                        u32 sdrc_rfr_ctrl_1, u32 sdrc_actim_ctrl_a_1,
+                        u32 sdrc_actim_ctrl_b_1, u32 sdrc_mr_1)
 {
         BUG_ON(!_omap3_sram_configure_core_dpll);
-        return _omap3_sram_configure_core_dpll(sdrc_rfr_ctrl,
-                                               sdrc_actim_ctrla,
-                                               sdrc_actim_ctrlb, m2,
-                                               unlock_dll, f, sdrc_mr, inc);
+        return _omap3_sram_configure_core_dpll(
+                        m2, unlock_dll, f, inc,
+                        sdrc_rfr_ctrl_0, sdrc_actim_ctrl_a_0,
+                        sdrc_actim_ctrl_b_0, sdrc_mr_0,
+                        sdrc_rfr_ctrl_1, sdrc_actim_ctrl_a_1,
+                        sdrc_actim_ctrl_b_1, sdrc_mr_1);
 }
 
 /* REVISIT: Should this be same as omap34xx_sram_init() after off-idle? */