[U-Boot] [PATCH 2/5] PXA: Add hardware init helper macros
Marek Vasut
marek.vasut at gmail.com
Tue Jul 6 03:12:46 CEST 2010
This patch adds macros for the following purposes:
- GPIO configuration
- SDRAM configuration
- Wakeup
- Clock configuration
- Interrupt controller configuration
These macros are intended to replace numerous copies of the same code.
Signed-off-by: Marek Vasut <marek.vasut at gmail.com>
---
arch/arm/include/asm/arch-pxa/macro.h | 324 +++++++++++++++++++++++++++++++++
1 files changed, 324 insertions(+), 0 deletions(-)
create mode 100644 arch/arm/include/asm/arch-pxa/macro.h
diff --git a/arch/arm/include/asm/arch-pxa/macro.h b/arch/arm/include/asm/arch-pxa/macro.h
new file mode 100644
index 0000000..035a57e
--- /dev/null
+++ b/arch/arm/include/asm/arch-pxa/macro.h
@@ -0,0 +1,324 @@
+/*
+ * arch/arm/include/asm/arch-pxa/macro.h
+ *
+ * Copyright (C) 2010 Marek Vasut <marek.vasut at gmail.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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
+ */
+
+#ifndef __ASM_ARCH_PXA_MACRO_H__
+#define __ASM_ARCH_PXA_MACRO_H__
+#ifdef __ASSEMBLY__
+
+#include <asm/macro.h>
+#include <asm/arch/pxa-regs.h>
+
+/*
+ * This macro performs a 32bit write to a memory location and makes sure the
+ * write operation really happened by performing a read back.
+ *
+ * Clobbered regs: r4, r5
+ */
+.macro write32rb addr, data
+ ldr r4, =\addr
+ ldr r5, =\data
+ str r5, [r4]
+ ldr r5, [r4]
+.endm
+
+/*
+ * This macro waits according to OSCR incrementation
+ *
+ * Clobbered regs: r4, r5, r6
+ */
+.macro pxa_wait_ticks ticks
+ ldr r4, =OSCR
+ mov r5, #0
+ str r5, [r4]
+ ldr r5, =\ticks
+1:
+ ldr r6, [r4]
+ cmp r5, r6
+ bgt 1b
+.endm
+
+/*
+ * This macro sets up the GPIO pins of the PXA2xx/PXA3xx CPU
+ *
+ * Clobbered regs: r4, r5
+ */
+.macro pxa_gpio_setup
+ write32 GPSR0, CONFIG_SYS_GPSR0_VAL
+ write32 GPSR1, CONFIG_SYS_GPSR1_VAL
+ write32 GPSR2, CONFIG_SYS_GPSR2_VAL
+#if defined(CONFIG_PXA27X) || defined(CONFIG_CPU_MONAHANS)
+ write32 GPSR3, CONFIG_SYS_GPSR3_VAL
+#endif
+
+ write32 GPCR0, CONFIG_SYS_GPCR0_VAL
+ write32 GPCR1, CONFIG_SYS_GPCR1_VAL
+ write32 GPCR2, CONFIG_SYS_GPCR2_VAL
+#if defined(CONFIG_PXA27X) || defined(CONFIG_CPU_MONAHANS)
+ write32 GPCR3, CONFIG_SYS_GPCR3_VAL
+#endif
+
+ write32 GPDR0, CONFIG_SYS_GPDR0_VAL
+ write32 GPDR1, CONFIG_SYS_GPDR1_VAL
+ write32 GPDR2, CONFIG_SYS_GPDR2_VAL
+#if defined(CONFIG_PXA27X) || defined(CONFIG_CPU_MONAHANS)
+ write32 GPDR3, CONFIG_SYS_GPDR3_VAL
+#endif
+
+ write32 GAFR0_L, CONFIG_SYS_GAFR0_L_VAL
+ write32 GAFR0_U, CONFIG_SYS_GAFR0_U_VAL
+ write32 GAFR1_L, CONFIG_SYS_GAFR1_L_VAL
+ write32 GAFR1_U, CONFIG_SYS_GAFR1_U_VAL
+ write32 GAFR2_L, CONFIG_SYS_GAFR2_L_VAL
+ write32 GAFR2_U, CONFIG_SYS_GAFR2_U_VAL
+#if defined(CONFIG_PXA27X) || defined(CONFIG_CPU_MONAHANS)
+ write32 GAFR3_L, CONFIG_SYS_GAFR3_L_VAL
+ write32 GAFR3_U, CONFIG_SYS_GAFR3_U_VAL
+#endif
+
+ write32 PSSR, CONFIG_SYS_PSSR_VAL
+.endm
+
+/*
+ * This macro sets up the Memory controller of the PXA2xx CPU
+ *
+ * Clobbered regs: r3, r4, r5
+ */
+.macro pxa_mem_setup
+ /* This comes handy when setting MDREFR */
+ ldr r3, =MEMC_BASE
+
+ /*
+ * 1) Initialize Asynchronous static memory controller
+ */
+
+ /* MSC0: nCS(0,1) */
+ write32rb (MEMC_BASE + MSC0_OFFSET), CONFIG_SYS_MSC0_VAL
+ /* MSC1: nCS(2,3) */
+ write32rb (MEMC_BASE + MSC1_OFFSET), CONFIG_SYS_MSC1_VAL
+ /* MSC2: nCS(4,5) */
+ write32rb (MEMC_BASE + MSC2_OFFSET), CONFIG_SYS_MSC2_VAL
+
+ /*
+ * 2) Initialize Card Interface
+ */
+
+ /* MECR: Memory Expansion Card Register */
+ write32rb (MEMC_BASE + MECR_OFFSET), CONFIG_SYS_MECR_VAL
+ /* MCMEM0: Card Interface slot 0 timing */
+ write32rb (MEMC_BASE + MCMEM0_OFFSET), CONFIG_SYS_MCMEM0_VAL
+ /* MCMEM1: Card Interface slot 1 timing */
+ write32rb (MEMC_BASE + MCMEM1_OFFSET), CONFIG_SYS_MCMEM1_VAL
+ /* MCATT0: Card Interface Attribute Space Timing, slot 0 */
+ write32rb (MEMC_BASE + MCATT0_OFFSET), CONFIG_SYS_MCATT0_VAL
+ /* MCATT1: Card Interface Attribute Space Timing, slot 1 */
+ write32rb (MEMC_BASE + MCATT1_OFFSET), CONFIG_SYS_MCATT1_VAL
+ /* MCIO0: Card Interface I/O Space Timing, slot 0 */
+ write32rb (MEMC_BASE + MCIO0_OFFSET), CONFIG_SYS_MCIO0_VAL
+ /* MCIO1: Card Interface I/O Space Timing, slot 1 */
+ write32rb (MEMC_BASE + MCIO1_OFFSET), CONFIG_SYS_MCIO1_VAL
+
+ /*
+ * 3) Configure Fly-By DMA register
+ */
+
+ write32rb (MEMC_BASE + FLYCNFG_OFFSET), CONFIG_SYS_FLYCNFG_VAL
+
+ /*
+ * 4) Initialize Timing for Sync Memory (SDCLK0)
+ */
+
+ /*
+ * Before accessing MDREFR we need a valid DRI field, so we set
+ * this to power on defaults + DRI field.
+ */
+ ldr r5, [r3, #MDREFR_OFFSET]
+ bic r5, r5, #0x0ff
+ bic r5, r5, #0xf00 /* MDREFR user config with zeroed DRI */
+
+ ldr r4, =CONFIG_SYS_MDREFR_VAL
+ mov r6, r4
+ lsl r4, #20
+ lsr r4, #20 /* Get a valid DRI field */
+
+ orr r5, r5, r4 /* MDREFR user config with correct DRI */
+
+ orr r5, #MDREFR_K0RUN
+ orr r5, #MDREFR_SLFRSH
+ bic r5, #MDREFR_APD
+ bic r5, #MDREFR_E1PIN
+
+ str r5, [r3, #MDREFR_OFFSET]
+ ldr r4, [r3, #MDREFR_OFFSET]
+
+ /*
+ * 5) Initialize Synchronous Static Memory (Flash/Peripherals)
+ */
+
+ /* Initialize SXCNFG register. Assert the enable bits.
+ *
+ * Write SXMRS to cause an MRS command to all enabled banks of
+ * synchronous static memory. Note that SXLCR need not be written
+ * at this time.
+ */
+ write32rb (MEMC_BASE + SXCNFG_OFFSET), CONFIG_SYS_SXCNFG_VAL
+
+ /*
+ * 6) Initialize SDRAM
+ */
+
+ bic r6, #MDREFR_SLFRSH
+ str r6, [r3, #MDREFR_OFFSET]
+ ldr r4, [r3, #MDREFR_OFFSET]
+
+ orr r6, #MDREFR_E1PIN
+ str r6, [r3, #MDREFR_OFFSET]
+ ldr r4, [r3, #MDREFR_OFFSET]
+
+ /*
+ * 7) Write MDCNFG with MDCNFG:DEx deasserted (set to 0), to configure
+ * but not enable each SDRAM partition pair.
+ */
+
+ /* Fetch platform value of MDCNFG */
+ ldr r4, =CONFIG_SYS_MDCNFG_VAL
+ /* Disable all sdram banks */
+ bic r4, r4, #(MDCNFG_DE0|MDCNFG_DE1)
+ bic r4, r4, #(MDCNFG_DE2|MDCNFG_DE3)
+ /* Write initial value of MDCNFG, w/o enabling sdram banks */
+ str r4, [r3, #MDCNFG_OFFSET]
+ ldr r4, [r3, #MDCNFG_OFFSET]
+
+ /* Wait for the clock to the SDRAMs to stabilize, 100..200 usec. */
+ pxa_wait_ticks 0x300
+
+ /*
+ * 8) Trigger a number (usually 8) refresh cycles by attempting
+ * non-burst read or write accesses to disabled SDRAM, as commonly
+ * specified in the power up sequence documented in SDRAM data
+ * sheets. The address(es) used for this purpose must not be
+ * cacheable.
+ */
+
+ ldr r4, =CONFIG_SYS_DRAM_BASE
+.rept 9
+ str r5, [r4]
+.endr
+
+ /*
+ * 9) Write MDCNFG with enable bits asserted (MDCNFG:DEx set to 1).
+ */
+
+ ldr r5, =CONFIG_SYS_MDCNFG_VAL
+ ldr r4, =(MDCNFG_DE0 | MDCNFG_DE1 | MDCNFG_DE2 | MDCNFG_DE3)
+ and r5, r5, r4
+ ldr r4, [r3, #MDCNFG_OFFSET]
+ orr r4, r4, r5
+ str r4, [r3, #MDCNFG_OFFSET]
+ ldr r4, [r3, #MDCNFG_OFFSET]
+
+ /*
+ * 10) Write MDMRS.
+ */
+
+ ldr r4, =CONFIG_SYS_MDMRS_VAL
+ str r4, [r3, #MDMRS_OFFSET]
+ ldr r4, [r3, #MDMRS_OFFSET]
+
+ /*
+ * 11) Enable APD
+ */
+
+ ldr r4, [r3, #MDREFR_OFFSET]
+ and r6, r6, #MDREFR_APD
+ orr r4, r4, r6
+ str r4, [r3, #MDREFR_OFFSET]
+ ldr r4, [r3, #MDREFR_OFFSET]
+.endm
+
+/*
+ * This macro tests if the CPU woke up from sleep and eventually resumes
+ *
+ * Clobbered regs: r4, r5
+ */
+.macro pxa_wakeup
+ ldr r4, =RCSR
+ ldr r5, [r4]
+ and r5, r5, #(RCSR_GPR | RCSR_SMR | RCSR_WDR | RCSR_HWR)
+ str r5, [r4]
+ teq r5, #RCSR_SMR
+
+ bne pxa_wakeup_exit
+
+ ldr r4, =PSSR
+ mov r5, #PSSR_PH
+ str r5, [r4]
+
+ ldr r4, =PSPR
+ ldr pc, [r4]
+pxa_wakeup_exit:
+.endm
+
+/*
+ * This macro disables all interupts on PXA2xx/PXA3xx CPU
+ *
+ * Clobbered regs: r4, r5
+ */
+.macro pxa_intr_setup
+ write32 ICLR, 0
+ write32 ICMR, 0
+#if defined(CONFIG_PXA27X) || defined(CONFIG_CPU_MONAHANS)
+ write32 ICLR2, 0
+ write32 ICMR2, 0
+#endif
+.endm
+
+/*
+ * This macro configures clock on PXA2xx/PXA3xx CPU
+ *
+ * Clobbered regs: r4, r5
+ */
+.macro pxa_clock_setup
+ /* Disable the peripheral clocks, and set the core clock frequency */
+
+ /* Turn Off ALL on-chip peripheral clocks for re-configuration */
+ write32 CKEN, CONFIG_SYS_CKEN
+
+ /* Write CCCR */
+ write32 CCCR, CONFIG_SYS_CCCR
+
+#ifdef CONFIG_RTC
+ /* enable the 32Khz oscillator for RTC and PowerManager */
+ write32 OSCC, #OSCC_OON
+ ldr r4, =OSCC
+
+ /* Spin here until OSCC.OOK get set, meaning the PLL has settled. */
+2:
+ ldr r5, [r4]
+ ands r5, r5, #1
+ beq 2b
+#endif
+.endm
+
+#endif /* __ASSEMBLY__ */
+#endif /* __ASM_ARCH_PXA_MACRO_H__ */
--
1.7.1
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