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@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@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__ */