diff options
Diffstat (limited to 'board/armltd')
| -rw-r--r-- | board/armltd/integrator/arm-ebi.h | 62 | ||||
| -rw-r--r-- | board/armltd/integrator/config.mk | 5 | ||||
| -rw-r--r-- | board/armltd/integrator/integrator-sc.h | 91 | ||||
| -rw-r--r-- | board/armltd/integrator/integrator.c | 63 |
4 files changed, 208 insertions, 13 deletions
diff --git a/board/armltd/integrator/arm-ebi.h b/board/armltd/integrator/arm-ebi.h new file mode 100644 index 0000000000..2d85e3fe90 --- /dev/null +++ b/board/armltd/integrator/arm-ebi.h @@ -0,0 +1,62 @@ +/* + * (C) Copyright 2011 + * Linaro + * Linus Walleij <linus.walleij@linaro.org> + * Register definitions for the External Bus Interface (EBI) + * found in the ARM Integrator AP and CP reference designs + * + * 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 __ARM_EBI_H +#define __ARM_EBI_H + +#define EBI_BASE 0x12000000 + +#define EBI_CSR0_REG 0x00 /* CS0 = Boot ROM */ +#define EBI_CSR1_REG 0x04 /* CS1 = Flash */ +#define EBI_CSR2_REG 0x08 /* CS2 = SSRAM */ +#define EBI_CSR3_REG 0x0C /* CS3 = Expansion memory */ +/* + * The four upper bits are the waitstates for each chip select + * 0x00 = 2 cycles, 0x10 = 3 cycles, ... 0xe0 = 16 cycles, 0xf0 = 16 cycles + */ +#define EBI_CSR_WAIT_MASK 0xF0 +/* Whether memory is synchronous or asynchronous */ +#define EBI_CSR_SYNC_MASK 0xF7 +#define EBI_CSR_ASYNC 0x00 +#define EBI_CSR_SYNC 0x08 +/* Whether memory is write enabled or not */ +#define EBI_CSR_WREN_MASK 0xFB +#define EBI_CSR_WREN_DISABLE 0x00 +#define EBI_CSR_WREN_ENABLE 0x04 +/* Memory bit width for each chip select */ +#define EBI_CSR_MEMSIZE_MASK 0xFC +#define EBI_CSR_MEMSIZE_8BIT 0x00 +#define EBI_CSR_MEMSIZE_16BIT 0x01 +#define EBI_CSR_MEMSIZE_32BIT 0x02 + +/* + * The lock register need to be written with 0xa05f before anything in the + * EBI can be changed. + */ +#define EBI_LOCK_REG 0x20 +#define EBI_UNLOCK_MAGIC 0xA05F + +#endif diff --git a/board/armltd/integrator/config.mk b/board/armltd/integrator/config.mk deleted file mode 100644 index 8b57af1c5e..0000000000 --- a/board/armltd/integrator/config.mk +++ /dev/null @@ -1,5 +0,0 @@ -# -# image should be loaded at 0x01000000 -# - -CONFIG_SYS_TEXT_BASE = 0x01000000 diff --git a/board/armltd/integrator/integrator-sc.h b/board/armltd/integrator/integrator-sc.h new file mode 100644 index 0000000000..279dc55b37 --- /dev/null +++ b/board/armltd/integrator/integrator-sc.h @@ -0,0 +1,91 @@ +/* + * (C) Copyright 2011 + * Linaro + * Linus Walleij <linus.walleij@linaro.org> + * Register definitions for the System Controller (SC) and + * the similar "CP Controller" found in the ARM Integrator/AP and + * Integrator/CP reference designs + * + * 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 __ARM_SC_H +#define __ARM_SC_H + +#define SC_BASE 0x11000000 + +/* + * The system controller registers + */ +#define SC_ID_OFFSET 0x00 +#define SC_OSC_OFFSET 0x04 +/* Setting this bit switches to 25 MHz mode, clear means 33 MHz */ +#define SC_OSC_DIVXY (1 << 8) +#define SC_CTRLS_OFFSET 0x08 +#define SC_CTRLC_OFFSET 0x0C +/* Set bits by writing CTRLS, clear bits by writing CTRLC */ +#define SC_CTRL_SOFTRESET (1 << 0) +#define SC_CTRL_FLASHVPP (1 << 1) +#define SC_CTRL_FLASHWP (1 << 2) +#define SC_CTRL_UART1DTR (1 << 4) +#define SC_CTRL_UART1RTS (1 << 5) +#define SC_CTRL_UART0DTR (1 << 6) +#define SC_CTRL_UART0RTS (1 << 7) +#define SC_DEC_OFFSET 0x10 +#define SC_ARB_OFFSET 0x14 +#define SC_PCI_OFFSET 0x18 +#define SC_PCI_PCIEN (1 << 0) +#define SC_PCI_PCIBINT_CLR (1 << 1) +#define SC_LOCK_OFFSET 0x1C +#define SC_LBFADDR_OFFSET 0x20 +#define SC_LBFCODE_OFFSET 0x24 + +#define SC_ID (SC_BASE + SC_ID_OFFSET) +#define SC_OSC (SC_BASE + SC_OSC_OFFSET) +#define SC_CTRLS (SC_BASE + SC_CTRLS_OFFSET) +#define SC_CTRLC (SC_BASE + SC_CTRLC_OFFSET) +#define SC_DEC (SC_BASE + SC_DEC_OFFSET) +#define SC_ARB (SC_BASE + SC_ARB_OFFSET) +#define SC_PCI (SC_BASE + SC_PCI_OFFSET) +#define SC_LOCK (SC_BASE + SC_LOCK_OFFSET) +#define SC_LBFADDR (SC_BASE + SC_LBFADDR_OFFSET) +#define SC_LBFCODE (SC_BASE + SC_LBFCODE_OFFSET) + +/* + * The Integrator/CP as a smaller set of registers, at a different + * offset - probably not to disturb old software. + */ + +#define CP_BASE 0xCB000000 + +#define CP_IDFIELD_OFFSET 0x00 +#define CP_FLASHPROG_OFFSET 0x04 +#define CP_FLASHPROG_FLVPPEN (1 << 0) +#define CP_FLASHPROG_FLWREN (1 << 1) +#define CP_FLASHPROG_FLASHSIZE (1 << 2) +#define CP_FLASHPROG_EXTRABANK (1 << 3) +#define CP_INTREG_OFFSET 0x08 +#define CP_DECODE_OFFSET 0x0C + +#define CP_IDFIELD (CP_BASE + CP_ID_OFFSET) +#define CP_FLASHPROG (CP_BASE + CP_FLASHPROG_OFFSET) +#define CP_INTREG (CP_BASE + CP_INTREG_OFFSET) +#define CP_DECODE (CP_BASE + CP_DECODE_OFFSET) + +#endif diff --git a/board/armltd/integrator/integrator.c b/board/armltd/integrator/integrator.c index c8d2bc7bac..a507c093aa 100644 --- a/board/armltd/integrator/integrator.c +++ b/board/armltd/integrator/integrator.c @@ -35,6 +35,9 @@ #include <common.h> #include <netdev.h> +#include <asm/io.h> +#include "arm-ebi.h" +#include "integrator-sc.h" DECLARE_GLOBAL_DATA_PTR; @@ -55,6 +58,8 @@ void show_boot_progress(int progress) int board_init (void) { + u32 val; + /* arch number of Integrator Board */ #ifdef CONFIG_ARCH_CINTEGRATOR gd->bd->bi_arch_number = MACH_TYPE_CINTEGRATOR; @@ -72,6 +77,37 @@ extern void cm_remap(void); cm_remap(); /* remaps writeable memory to 0x00000000 */ #endif +#ifdef CONFIG_ARCH_CINTEGRATOR + /* + * Flash protection on the Integrator/CP is in a simple register + */ + val = readl(CP_FLASHPROG); + val |= (CP_FLASHPROG_FLVPPEN | CP_FLASHPROG_FLWREN); + writel(val, CP_FLASHPROG); +#else + /* + * The Integrator/AP has some special protection mechanisms + * for the external memories, first the External Bus Interface (EBI) + * then the system controller (SC). + * + * The system comes up with the flash memory non-writable and + * configuration locked. If we want U-Boot to be used for flash + * access we cannot have the flash memory locked. + */ + writel(EBI_UNLOCK_MAGIC, EBI_BASE + EBI_LOCK_REG); + val = readl(EBI_BASE + EBI_CSR1_REG); + val &= EBI_CSR_WREN_MASK; + val |= EBI_CSR_WREN_ENABLE; + writel(val, EBI_BASE + EBI_CSR1_REG); + writel(0, EBI_BASE + EBI_LOCK_REG); + + /* + * Set up the system controller to remove write protection from + * the flash memory and enable Vpp + */ + writel(SC_CTRL_FLASHVPP | SC_CTRL_FLASHWP, SC_CTRLS); +#endif + icache_enable (); return 0; @@ -86,21 +122,30 @@ int misc_init_r (void) return (0); } +/* + * The Integrator remaps the Flash memory to 0x00000000 and executes U-Boot + * from there, which means we cannot test the RAM underneath the ROM at this + * point. It will be unmapped later on, when we are executing from the + * relocated in RAM U-Boot. We simply assume that this RAM is usable if the + * RAM on higher addresses works fine. + */ +#define REMAPPED_FLASH_SZ 0x40000 + int dram_init (void) { gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE; #ifdef CONFIG_CM_SPD_DETECT { extern void dram_query(void); - unsigned long cm_reg_sdram; - unsigned long sdram_shift; + u32 cm_reg_sdram; + u32 sdram_shift; dram_query(); /* Assembler accesses to CM registers */ /* Queries the SPD values */ /* Obtain the SDRAM size from the CM SDRAM register */ - cm_reg_sdram = *(volatile ulong *)(CM_BASE + OS_SDRAM); + cm_reg_sdram = readl(CM_BASE + OS_SDRAM); /* Register SDRAM size * * 0xXXXXXXbbb000bb 16 MB @@ -110,16 +155,18 @@ extern void dram_query(void); * 0xXXXXXXbbb100bb 256 MB * */ - sdram_shift = ((cm_reg_sdram & 0x0000001C)/4)%4; - gd->bd->bi_dram[0].size = 0x01000000 << sdram_shift; - gd->ram_size = get_ram_size((long *)CONFIG_SYS_SDRAM_BASE, + sdram_shift = ((cm_reg_sdram & 0x0000001C)/4)%4; + gd->ram_size = get_ram_size((long *) CONFIG_SYS_SDRAM_BASE + + REMAPPED_FLASH_SZ, 0x01000000 << sdram_shift); } #else - gd->bd->bi_dram[0].size = PHYS_SDRAM_1_SIZE; - gd->ram_size = get_ram_size((long *)CONFIG_SYS_SDRAM_BASE, + gd->ram_size = get_ram_size((long *) CONFIG_SYS_SDRAM_BASE + + REMAPPED_FLASH_SZ, PHYS_SDRAM_1_SIZE); #endif /* CM_SPD_DETECT */ + /* We only have one bank of RAM, set it to whatever was detected */ + gd->bd->bi_dram[0].size = gd->ram_size; return 0; } |
