This adds sram34xx.S From TI CDP.
NOTE: This patch breaks compile for 34xx, the compile will be fixed in
the next patch. This and next patch will eventually get merged into
a single patch for linux-omap to keep git-bisect working.
---
arch/arm/mach-omap2/Makefile | 1 +
arch/arm/mach-omap2/sram34xx.S | 217 ++++++++++++++++++++++++++++++++++++++++
2 files changed, 218 insertions(+), 0 deletions(-)
create mode 100644 arch/arm/mach-omap2/sram34xx.S
diff --git a/arch/arm/mach-omap2/Makefile b/arch/arm/mach-omap2/Makefile
index 45f4b4e..0a6df8e 100644
--- a/arch/arm/mach-omap2/Makefile
+++ b/arch/arm/mach-omap2/Makefile
@@ -8,6 +8,7 @@ obj-y := irq.o id.o io.o memory.o control.o prcm.o clock.o mux.o \
# Functions loaded to SRAM
obj-$(CONFIG_ARCH_OMAP2) += sram24xx.o
+obj-$(CONFIG_ARCH_OMAP3) += sram34xx.o
# Power Management
obj-$(CONFIG_PM) += pm.o sleep.o
diff --git a/arch/arm/mach-omap2/sram34xx.S b/arch/arm/mach-omap2/sram34xx.S
new file mode 100644
index 0000000..803f60d
--- /dev/null
+++ b/arch/arm/mach-omap2/sram34xx.S
@@ -0,0 +1,217 @@
+/*
+ * linux/arch/arm/mach-omap3/sram.S
+ *
+ * Omap3 specific functions that need to be run in internal SRAM
+ *
+ * (C) Copyright 2007
+ * Texas Instruments Inc.
+ * Rajendra Nayak <rnayak@xxxxxx>
+ *
+ * (C) Copyright 2004
+ * Texas Instruments, <www.ti.com>
+ * Richard Woodruff <r-woodruff2@xxxxxx>
+ *
+ * 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 <asm/arch/io.h>
+#include <asm/hardware.h>
+
+#include "prcm-regs.h"
+
+#define CM_CLKSEL1_PLL_V IO_ADDRESS(CM_BASE + 0xD40)
+#define CM_ICLKEN1_CORE_V IO_ADDRESS(CM_BASE + 0xA10)
+#define CM_IDLEST1_CORE_V IO_ADDRESS(CM_BASE + 0xA20)
+
+#define SDRC_POWER_V IO_ADDRESS(SDRC_BASE + 0x070)
+#define SDRC_RFR_CTRL IO_ADDRESS(SDRC_BASE + 0x0A4)
+#define SDRC_ACTIM_CTRL_A IO_ADDRESS(SDRC_BASE + 0x09C)
+#define SDRC_ACTIM_CTRL_B IO_ADDRESS(SDRC_BASE + 0x0A0)
+#define SDRC_DLLA_STATUS IO_ADDRESS(SDRC_BASE + 0x064)
+#define SDRC_DLLA_CTRL IO_ADDRESS(SDRC_BASE + 0x060)
+
+ .text
+
+ENTRY(omap34xx_sram_ddr_init)
+ stmfd sp!, {r0 - r12, lr} @ save registers on stack
+ ldmfd sp!, {r0 - r12, pc} @ restore regs and return
+ENTRY(omap34xx_sram_ddr_init_sz)
+ .word . - omap34xx_sram_ddr_init
+
+ENTRY(omap34xx_sram_reprogram_sdrc)
+ stmfd sp!, {r0 - r10, lr} @ save registers on stack
+ ldmfd sp!, {r0 - r10, pc} @ restore regs and return
+ENTRY(omap34xx_sram_reprogram_sdrc_sz)
+ .word . - omap34xx_sram_reprogram_sdrc
+
+/*
+ * Set dividers and pll. Also recalculate DLL value for DDR and unlock mode.
+ */
+ENTRY(omap34xx_sram_set_prcm)
+ stmfd sp!, {r0-r12, lr} @ regs to stack
+ENTRY(omap34xx_sram_set_prcm_sz)
+ .word . - omap34xx_sram_set_prcm
+
+/*
+ * Change frequency of core dpll
+ * r0 = sdrc_rfr_ctrl r1 = sdrc_actim_ctrla r2 = sdrc_actim_ctrlb r3 = M2
+ */
+ENTRY(omap34xx_sram_configure_core_dpll)
+ stmfd sp!, {r1-r12, lr} @ store regs to stack
+ cmp r3, #0x2
+ blne configure_sdrc
+ cmp r3, #0x2
+ blne lock_dll
+ cmp r3, #0x1
+ blne unlock_dll
+ bl sdram_in_selfrefresh @ put the SDRAM in self refresh
+ bl configure_core_dpll
+ bl enable_sdrc
+ cmp r3, #0x1
+ blne wait_dll_unlock
+ cmp r3, #0x2
+ blne wait_dll_lock
+ cmp r3, #0x1
+ blne configure_sdrc
+ mov r0, #0 @ return value
+ ldmfd sp!, {r1-r12, pc} @ restore regs and return
+unlock_dll:
+ ldr r4, sdrc_dlla_ctrl
+ ldr r5, [r4]
+ orr r5, r5, #0x4
+ str r5, [r4]
+ bx lr
+lock_dll:
+ ldr r4, sdrc_dlla_ctrl
+ ldr r5, [r4]
+ bic r5, r5, #0x4
+ str r5, [r4]
+ bx lr
+sdram_in_selfrefresh:
+ mov r5, #0x0 @ Move 0 to R5
+ mcr p15, 0, r5, c7, c10, 5 @ memory barrier
+ ldr r4, sdrc_power @ read the SDRC_POWER register
+ ldr r5, [r4] @ read the contents of SDRC_POWER
+ orr r5, r5, #0x40 @ enable self refresh on idle req
+ str r5, [r4] @ write back to SDRC_POWER register
+ ldr r4, cm_iclken1_core @ read the CM_ICLKEN1_CORE reg
+ ldr r5, [r4]
+ bic r5, r5, #0x2 @ disable iclk bit for SRDC
+ str r5, [r4]
+wait_sdrc_idle:
+ ldr r4, cm_idlest1_core
+ ldr r5, [r4]
+ and r5, r5, #0x2 @ check for SDRC idle
+ cmp r5, #2
+ bne wait_sdrc_idle
+ bx lr
+configure_core_dpll:
+ ldr r4, cm_clksel1_pll
+ ldr r5, [r4]
+ ldr r6, core_m2_mask_val @ modify m2 for core dpll
+ and r5, r5, r6
+ orr r5, r5, r3, lsl #0x1B @ r3 contains the M2 val
+ str r5, [r4]
+ mov r5, #0x800 @ wait for the clock to stabilise
+ cmp r3, #2
+ bne wait_clk_stable
+ bx lr
+wait_clk_stable:
+ subs r5, r5, #1
+ bne wait_clk_stable
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+ bx lr
+enable_sdrc:
+ ldr r4, cm_iclken1_core
+ ldr r5, [r4]
+ orr r5, r5, #0x2 @ enable iclk bit for SDRC
+ str r5, [r4]
+wait_sdrc_idle1:
+ ldr r4, cm_idlest1_core
+ ldr r5, [r4]
+ and r5, r5, #0x2
+ cmp r5, #0
+ bne wait_sdrc_idle1
+ ldr r4, sdrc_power
+ ldr r5, [r4]
+ bic r5, r5, #0x40
+ str r5, [r4]
+ bx lr
+wait_dll_lock:
+ ldr r4, sdrc_dlla_status
+ ldr r5, [r4]
+ and r5, r5, #0x4
+ cmp r5, #0x4
+ bne wait_dll_lock
+ bx lr
+wait_dll_unlock:
+ ldr r4, sdrc_dlla_status
+ ldr r5, [r4]
+ and r5, r5, #0x4
+ cmp r5, #0x0
+ bne wait_dll_unlock
+ bx lr
+configure_sdrc:
+ ldr r4, sdrc_rfr_ctrl
+ str r0, [r4]
+ ldr r4, sdrc_actim_ctrla
+ str r1, [r4]
+ ldr r4, sdrc_actim_ctrlb
+ str r2, [r4]
+ bx lr
+sdrc_power:
+ .word SDRC_POWER_V
+cm_clksel1_pll:
+ .word CM_CLKSEL1_PLL_V
+cm_idlest1_core:
+ .word CM_IDLEST1_CORE_V
+cm_iclken1_core:
+ .word CM_ICLKEN1_CORE_V
+sdrc_rfr_ctrl:
+ .word SDRC_RFR_CTRL
+sdrc_actim_ctrla:
+ .word SDRC_ACTIM_CTRL_A
+sdrc_actim_ctrlb:
+ .word SDRC_ACTIM_CTRL_B
+sdrc_dlla_status:
+ .word SDRC_DLLA_STATUS
+sdrc_dlla_ctrl:
+ .word SDRC_DLLA_CTRL
+core_m2_mask_val:
+ .word 0xE7FFFFFF
+
+ENTRY(omap34xx_sram_configure_core_dpll_sz)
+ .word . - omap34xx_sram_configure_core_dpll
+
+/*
+ * Reprogram GPMC
+ */
+ENTRY(omap34xx_sram_reprogram_gpmc)
+ stmfd sp!, {r0-r12, lr} @ regs to stack
+ ldmfd sp!, {r0-r12, pc} @ restore regs and return
+
+ENTRY(omap34xx_sram_reprogram_gpmc_sz)
+ .word . - omap34xx_sram_reprogram_gpmc
--
1.5.3.6
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