+++ /dev/null
-/*
- * OMAP34xx M2 divider clock code
- *
- * Copyright (C) 2007-2008 Texas Instruments, Inc.
- * Copyright (C) 2007-2010 Nokia Corporation
- *
- * Paul Walmsley
- * Jouni Högander
- *
- * Parts of this code are based on code written by
- * Richard Woodruff, Tony Lindgren, Tuukka Tikkanen, Karthik Dasu
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-#undef DEBUG
-
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <linux/clk.h>
-#include <linux/io.h>
-
-#include "clock.h"
-#include "clock3xxx.h"
-#include "sdrc.h"
-#include "sram.h"
-
-#define CYCLES_PER_MHZ 1000000
-
-struct clk *sdrc_ick_p, *arm_fck_p;
-
-/*
- * CORE DPLL (DPLL3) M2 divider rate programming functions
- *
- * These call into SRAM code to do the actual CM writes, since the SDRAM
- * is clocked from DPLL3.
- */
-
-/**
- * omap3_core_dpll_m2_set_rate - set CORE DPLL M2 divider
- * @clk: struct clk * of DPLL to set
- * @rate: rounded target rate
- *
- * Program the DPLL M2 divider with the rounded target rate. Returns
- * -EINVAL upon error, or 0 upon success.
- */
-int omap3_core_dpll_m2_set_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long parent_rate)
-{
- struct clk_hw_omap *clk = to_clk_hw_omap(hw);
- u32 new_div = 0;
- u32 unlock_dll = 0;
- u32 c;
- unsigned long validrate, sdrcrate, _mpurate;
- struct omap_sdrc_params *sdrc_cs0;
- struct omap_sdrc_params *sdrc_cs1;
- int ret;
- unsigned long clkrate;
-
- if (!clk || !rate)
- return -EINVAL;
-
- new_div = DIV_ROUND_UP(parent_rate, rate);
- validrate = parent_rate / new_div;
-
- if (validrate != rate)
- return -EINVAL;
-
- sdrcrate = clk_get_rate(sdrc_ick_p);
- clkrate = clk_hw_get_rate(hw);
- if (rate > clkrate)
- sdrcrate <<= ((rate / clkrate) >> 1);
- else
- sdrcrate >>= ((clkrate / rate) >> 1);
-
- ret = omap2_sdrc_get_params(sdrcrate, &sdrc_cs0, &sdrc_cs1);
- if (ret)
- return -EINVAL;
-
- if (sdrcrate < MIN_SDRC_DLL_LOCK_FREQ) {
- pr_debug("clock: will unlock SDRC DLL\n");
- unlock_dll = 1;
- }
-
- /*
- * XXX This only needs to be done when the CPU frequency changes
- */
- _mpurate = clk_get_rate(arm_fck_p) / CYCLES_PER_MHZ;
- c = (_mpurate << SDRC_MPURATE_SCALE) >> SDRC_MPURATE_BASE_SHIFT;
- c += 1; /* for safety */
- c *= SDRC_MPURATE_LOOPS;
- c >>= SDRC_MPURATE_SCALE;
- if (c == 0)
- c = 1;
-
- pr_debug("clock: changing CORE DPLL rate from %lu to %lu\n",
- clkrate, validrate);
- 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 > clkrate,
- 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 > clkrate,
- sdrc_cs0->rfr_ctrl, sdrc_cs0->actim_ctrla,
- sdrc_cs0->actim_ctrlb, sdrc_cs0->mr,
- 0, 0, 0, 0);
- return 0;
-}
-
+++ /dev/null
-/*
- * linux/arch/arm/mach-omap3/sram.S
- *
- * Omap3 specific functions that need to be run in internal SRAM
- *
- * Copyright (C) 2004, 2007, 2008 Texas Instruments, Inc.
- * Copyright (C) 2008 Nokia Corporation
- *
- * Rajendra Nayak <rnayak@ti.com>
- * Richard Woodruff <r-woodruff2@ti.com>
- * Paul Walmsley
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR /PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- */
-#include <linux/linkage.h>
-
-#include <asm/assembler.h>
-
-#include "soc.h"
-#include "iomap.h"
-#include "sdrc.h"
-#include "cm3xxx.h"
-
-/*
- * This file needs be built unconditionally as ARM to interoperate correctly
- * with non-Thumb-2-capable firmware.
- */
- .arm
-
- .text
-
-/* r1 parameters */
-#define SDRC_NO_UNLOCK_DLL 0x0
-#define SDRC_UNLOCK_DLL 0x1
-
-/* SDRC_DLLA_CTRL bit settings */
-#define FIXEDDELAY_SHIFT 24
-#define FIXEDDELAY_MASK (0xff << FIXEDDELAY_SHIFT)
-#define DLLIDLE_MASK 0x4
-
-/*
- * SDRC_DLLA_CTRL default values: TI hardware team indicates that
- * FIXEDDELAY should be initialized to 0xf. This apparently was
- * empirically determined during process testing, so no derivation
- * was provided.
- */
-#define FIXEDDELAY_DEFAULT (0x0f << FIXEDDELAY_SHIFT)
-
-/* SDRC_DLLA_STATUS bit settings */
-#define LOCKSTATUS_MASK 0x4
-
-/* SDRC_POWER bit settings */
-#define SRFRONIDLEREQ_MASK 0x40
-
-/* 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
- *
- * 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
- * r2 = number of MPU cycles to wait for SDRC to stabilize after
- * reprogramming the SDRC when switching to a slower MPU speed
- * 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
- *
- * NOTE: This code no longer attempts to program the SDRC AC timing and MR
- * registers. This is because the code currently cannot ensure that all
- * L3 initiators (e.g., sDMA, IVA, DSS DISPC, etc.) are not accessing the
- * SDRAM when the registers are written. If the registers are changed while
- * an initiator is accessing SDRAM, memory can be corrupted and/or the SDRC
- * may enter an unpredictable state. In the future, the intent is to
- * re-enable this code in cases where we can ensure that no initiators are
- * touching the SDRAM. Until that time, users who know that their use case
- * can satisfy the above requirement can enable the CONFIG_OMAP3_SDRC_AC_TIMING
- * option.
- *
- * Richard Woodruff notes that any changes to this code must be carefully
- * audited and tested to ensure that they don't cause a TLB miss while
- * the SDRAM is inaccessible. Such a situation will crash the system
- * since it will cause the ARM MMU to attempt to walk the page tables.
- * These crashes may be intermittent.
- */
- .align 3
-ENTRY(omap3_sram_configure_core_dpll)
- stmfd sp!, {r1-r12, lr} @ store regs to stack
-
- @ pull the extra args off the stack
- @ and store them in SRAM
-
-/*
- * PC-relative stores are deprecated in ARMv7 and lead to undefined behaviour
- * in Thumb-2: use a r7 as a base instead.
- * Be careful not to clobber r7 when maintaing this file.
- */
- THUMB( adr r7, omap3_sram_configure_core_dpll )
- .macro strtext Rt:req, label:req
- ARM( str \Rt, \label )
- THUMB( str \Rt, [r7, \label - omap3_sram_configure_core_dpll] )
- .endm
-
- ldr r4, [sp, #52]
- strtext r4, omap_sdrc_rfr_ctrl_0_val
- ldr r4, [sp, #56]
- strtext r4, omap_sdrc_actim_ctrl_a_0_val
- ldr r4, [sp, #60]
- strtext r4, omap_sdrc_actim_ctrl_b_0_val
- ldr r4, [sp, #64]
- strtext r4, omap_sdrc_mr_0_val
- ldr r4, [sp, #68]
- strtext 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]
- strtext r4, omap_sdrc_actim_ctrl_a_1_val
- ldr r4, [sp, #76]
- strtext r4, omap_sdrc_actim_ctrl_b_1_val
- ldr r4, [sp, #80]
- strtext r4, omap_sdrc_mr_1_val
-skip_cs1_params:
- mrc p15, 0, r8, c1, c0, 0 @ read ctrl register
- bic r10, r8, #0x800 @ clear Z-bit, disable branch prediction
- mcr p15, 0, r10, c1, c0, 0 @ write ctrl register
- dsb @ flush buffered writes to interconnect
- isb @ prevent speculative exec past here
- cmp r3, #1 @ if increasing SDRC clk rate,
- bleq configure_sdrc @ program the SDRC regs early (for RFR)
- 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
- mov r12, r2
- bl wait_clk_stable @ wait for SDRC to stabilize
- bl enable_sdrc @ take SDRC out of idle
- cmp r1, #SDRC_UNLOCK_DLL @ wait for DLL status to change
- bleq wait_dll_unlock
- blne wait_dll_lock
- cmp r3, #1 @ if increasing SDRC clk rate,
- beq return_to_sdram @ return to SDRAM code, otherwise,
- bl configure_sdrc @ reprogram SDRC regs now
-return_to_sdram:
- mcr p15, 0, r8, c1, c0, 0 @ restore ctrl register
- isb @ prevent speculative exec past here
- mov r0, #0 @ return value
- ldmfd sp!, {r1-r12, pc} @ restore regs and return
-unlock_dll:
- ldr r11, omap3_sdrc_dlla_ctrl
- ldr r12, [r11]
- bic r12, r12, #FIXEDDELAY_MASK
- orr r12, r12, #FIXEDDELAY_DEFAULT
- 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, #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, #SRFRONIDLEREQ_MASK @ enable self refresh on idle
- 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, #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, #ST_SDRC_MASK @ check for SDRC idle
- cmp r12, #ST_SDRC_MASK
- bne wait_sdrc_idle
- bx lr
-configure_core_dpll:
- ldr r11, omap3_cm_clksel1_pll
- ldr r12, [r11]
- ldr r10, core_m2_mask_val @ modify m2 for core dpll
- and r12, r12, r10
- orr r12, r12, r0, lsl #CORE_DPLL_CLKOUT_DIV_SHIFT
- str r12, [r11]
- ldr r12, [r11] @ posted-write barrier for CM
- bx lr
-wait_clk_stable:
- subs r12, r12, #1
- bne wait_clk_stable
- bx lr
-enable_sdrc:
- ldr r11, omap3_cm_iclken1_core
- ldr r12, [r11]
- 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, #ST_SDRC_MASK
- cmp r12, #0
- bne wait_sdrc_idle1
-restore_sdrc_power_val:
- ldr r11, omap3_sdrc_power
- str r9, [r11] @ restore SDRC_POWER, no barrier needed
- bx lr
-wait_dll_lock:
- ldr r11, omap3_sdrc_dlla_status
- ldr r12, [r11]
- 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, #LOCKSTATUS_MASK
- cmp r12, #0x0
- bne wait_dll_unlock
- bx lr
-configure_sdrc:
- 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
-#ifdef CONFIG_OMAP3_SDRC_AC_TIMING
- 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 r12, [r11]
-#endif
- 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]
-#ifdef CONFIG_OMAP3_SDRC_AC_TIMING
- 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]
-#endif
-skip_cs1_prog:
- ldr r12, [r11] @ posted-write barrier for SDRC
- bx lr
-
- .align
-omap3_sdrc_power:
- .word OMAP34XX_SDRC_REGADDR(SDRC_POWER)
-omap3_cm_clksel1_pll:
- .word OMAP34XX_CM_REGADDR(PLL_MOD, CM_CLKSEL1)
-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_0:
- .word OMAP34XX_SDRC_REGADDR(SDRC_RFR_CTRL_0)
-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_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:
- .word OMAP34XX_SDRC_REGADDR(SDRC_DLLA_CTRL)
-core_m2_mask_val:
- .word 0x07FFFFFF
-ENDPROC(omap3_sram_configure_core_dpll)
-
-ENTRY(omap3_sram_configure_core_dpll_sz)
- .word . - omap3_sram_configure_core_dpll
-
projects / GitHub / moto-9609 / android_kernel_motorola_exynos9610.git / commitdiff