diff options
Diffstat (limited to 'arch/arm/mach-omap2')
| -rw-r--r-- | arch/arm/mach-omap2/sram34xx.S | 53 |
1 files changed, 38 insertions, 15 deletions
diff --git a/arch/arm/mach-omap2/sram34xx.S b/arch/arm/mach-omap2/sram34xx.S index 37a1e1fc0ab6..16eb4efa8b74 100644 --- a/arch/arm/mach-omap2/sram34xx.S +++ b/arch/arm/mach-omap2/sram34xx.S @@ -36,6 +36,29 @@ .text +/* r4 parameters */ +#define SDRC_NO_UNLOCK_DLL 0x0 +#define SDRC_UNLOCK_DLL 0x1 + +/* SDRC_DLLA_CTRL bit settings */ +#define DLLIDLE_MASK 0x4 + +/* SDRC_DLLA_STATUS bit settings */ +#define LOCKSTATUS_MASK 0x4 + +/* SDRC_POWER bit settings */ +#define SRFRONIDLEREQ_MASK 0x40 +#define PWDENA_MASK 0x4 + +/* CM_IDLEST1_CORE bit settings */ +#define ST_SDRC_MASK 0x2 + +/* CM_ICLKEN1_CORE bit settings */ +#define EN_SDRC_MASK 0x2 + +/* CM_CLKSEL1_PLL bit settings */ +#define CORE_DPLL_CLKOUT_DIV_SHIFT 0x1b + /* * omap3_sram_configure_core_dpll - change DPLL3 M2 divider * r0 = new SDRC_RFR_CTRL register contents @@ -57,13 +80,13 @@ ENTRY(omap3_sram_configure_core_dpll) dsb @ flush buffered writes to interconnect cmp r3, #0x2 @ if increasing SDRC clk rate, blne configure_sdrc @ program the SDRC regs early (for RFR) - cmp r4, #0x1 @ set the intended DLL state + cmp r4, #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, #0x1 @ wait for DLL status to change + cmp r4, #SDRC_UNLOCK_DLL @ wait for DLL status to change bleq wait_dll_unlock blne wait_dll_lock cmp r3, #0x1 @ if increasing SDRC clk rate, @@ -78,33 +101,33 @@ return_to_sdram: unlock_dll: ldr r11, omap3_sdrc_dlla_ctrl ldr r12, [r11] - orr r12, r12, #0x4 + orr r12, r12, #DLLIDLE_MASK str r12, [r11] @ (no OCP barrier needed) bx lr lock_dll: ldr r11, omap3_sdrc_dlla_ctrl ldr r12, [r11] - bic r12, r12, #0x4 + bic r12, r12, #DLLIDLE_MASK str r12, [r11] @ (no OCP barrier needed) bx lr sdram_in_selfrefresh: ldr r11, omap3_sdrc_power @ read the SDRC_POWER register ldr r12, [r11] @ read the contents of SDRC_POWER mov r9, r12 @ keep a copy of SDRC_POWER bits - orr r12, r12, #0x40 @ enable self refresh on idle req - bic r12, r12, #0x4 @ clear PWDENA + orr r12, r12, #SRFRONIDLEREQ_MASK @ enable self refresh on idle + bic r12, r12, #PWDENA_MASK @ clear PWDENA str r12, [r11] @ write back to SDRC_POWER register ldr r12, [r11] @ posted-write barrier for SDRC idle_sdrc: ldr r11, omap3_cm_iclken1_core @ read the CM_ICLKEN1_CORE reg ldr r12, [r11] - bic r12, r12, #0x2 @ disable iclk bit for SDRC + bic r12, r12, #EN_SDRC_MASK @ disable iclk bit for SDRC str r12, [r11] wait_sdrc_idle: ldr r11, omap3_cm_idlest1_core ldr r12, [r11] - and r12, r12, #0x2 @ check for SDRC idle - cmp r12, #2 + and r12, r12, #ST_SDRC_MASK @ check for SDRC idle + cmp r12, #ST_SDRC_MASK bne wait_sdrc_idle bx lr configure_core_dpll: @@ -112,7 +135,7 @@ 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 #0x1B @ r3 contains the M2 val + orr r12, r12, r3, lsl #CORE_DPLL_CLKOUT_DIV_SHIFT str r12, [r11] ldr r12, [r11] @ posted-write barrier for CM bx lr @@ -123,12 +146,12 @@ wait_clk_stable: enable_sdrc: ldr r11, omap3_cm_iclken1_core ldr r12, [r11] - orr r12, r12, #0x2 @ enable iclk bit for SDRC + orr r12, r12, #EN_SDRC_MASK @ enable iclk bit for SDRC str r12, [r11] wait_sdrc_idle1: ldr r11, omap3_cm_idlest1_core ldr r12, [r11] - and r12, r12, #0x2 + and r12, r12, #ST_SDRC_MASK cmp r12, #0 bne wait_sdrc_idle1 restore_sdrc_power_val: @@ -138,14 +161,14 @@ restore_sdrc_power_val: wait_dll_lock: ldr r11, omap3_sdrc_dlla_status ldr r12, [r11] - and r12, r12, #0x4 - cmp r12, #0x4 + and r12, r12, #LOCKSTATUS_MASK + cmp r12, #LOCKSTATUS_MASK bne wait_dll_lock bx lr wait_dll_unlock: ldr r11, omap3_sdrc_dlla_status ldr r12, [r11] - and r12, r12, #0x4 + and r12, r12, #LOCKSTATUS_MASK cmp r12, #0x0 bne wait_dll_unlock bx lr |