diff options
Diffstat (limited to 'arch/arm/cpu/armv7/tegra20/board.c')
| -rw-r--r-- | arch/arm/cpu/armv7/tegra20/board.c | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv7/tegra20/board.c b/arch/arm/cpu/armv7/tegra20/board.c new file mode 100644 index 000000000..e595ff9c0 --- /dev/null +++ b/arch/arm/cpu/armv7/tegra20/board.c @@ -0,0 +1,167 @@ +/* + * (C) Copyright 2010,2011 + * NVIDIA Corporation <www.nvidia.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 + */ + +#include <common.h> +#include <asm/io.h> +#include <asm/arch/ap20.h> +#include <asm/arch/clock.h> +#include <asm/arch/funcmux.h> +#include <asm/arch/pmc.h> +#include <asm/arch/sys_proto.h> +#include <asm/arch/tegra20.h> + +DECLARE_GLOBAL_DATA_PTR; + +enum { + /* UARTs which we can enable */ + UARTA = 1 << 0, + UARTB = 1 << 1, + UARTD = 1 << 3, + UART_COUNT = 4, +}; + +/* + * Boot ROM initializes the odmdata in APBDEV_PMC_SCRATCH20_0, + * so we are using this value to identify memory size. + */ + +unsigned int query_sdram_size(void) +{ + struct pmc_ctlr *const pmc = (struct pmc_ctlr *)TEGRA20_PMC_BASE; + u32 reg; + + reg = readl(&pmc->pmc_scratch20); + debug("pmc->pmc_scratch20 (ODMData) = 0x%08x\n", reg); + + /* bits 31:28 in OdmData are used for RAM size */ + switch ((reg) >> 28) { + case 1: + return 0x10000000; /* 256 MB */ + case 2: + default: + return 0x20000000; /* 512 MB */ + case 3: + return 0x40000000; /* 1GB */ + } +} + +int dram_init(void) +{ + /* We do not initialise DRAM here. We just query the size */ + gd->ram_size = query_sdram_size(); + return 0; +} + +#ifdef CONFIG_DISPLAY_BOARDINFO +int checkboard(void) +{ + printf("Board: %s\n", sysinfo.board_string); + return 0; +} +#endif /* CONFIG_DISPLAY_BOARDINFO */ + +#ifdef CONFIG_ARCH_CPU_INIT +/* + * Note this function is executed by the ARM7TDMI AVP. It does not return + * in this case. It is also called once the A9 starts up, but does nothing in + * that case. + */ +int arch_cpu_init(void) +{ + /* Fire up the Cortex A9 */ + tegra20_start(); + + /* We didn't do this init in start.S, so do it now */ + cpu_init_cp15(); + + /* Initialize essential common plls */ + clock_early_init(); + + return 0; +} +#endif + +static int uart_configs[] = { +#if defined(CONFIG_TEGRA20_UARTA_UAA_UAB) + FUNCMUX_UART1_UAA_UAB, +#elif defined(CONFIG_TEGRA20_UARTA_GPU) + FUNCMUX_UART1_GPU, +#elif defined(CONFIG_TEGRA20_UARTA_SDIO1) + FUNCMUX_UART1_SDIO1, +#else + FUNCMUX_UART1_IRRX_IRTX, +#endif + FUNCMUX_UART2_IRDA, + -1, + FUNCMUX_UART4_GMC, + -1, +}; + +/** + * Set up the specified uarts + * + * @param uarts_ids Mask containing UARTs to init (UARTx) + */ +static void setup_uarts(int uart_ids) +{ + static enum periph_id id_for_uart[] = { + PERIPH_ID_UART1, + PERIPH_ID_UART2, + PERIPH_ID_UART3, + PERIPH_ID_UART4, + }; + size_t i; + + for (i = 0; i < UART_COUNT; i++) { + if (uart_ids & (1 << i)) { + enum periph_id id = id_for_uart[i]; + + funcmux_select(id, uart_configs[i]); + clock_ll_start_uart(id); + } + } +} + +void board_init_uart_f(void) +{ + int uart_ids = 0; /* bit mask of which UART ids to enable */ + +#ifdef CONFIG_TEGRA20_ENABLE_UARTA + uart_ids |= UARTA; +#endif +#ifdef CONFIG_TEGRA20_ENABLE_UARTB + uart_ids |= UARTB; +#endif +#ifdef CONFIG_TEGRA20_ENABLE_UARTD + uart_ids |= UARTD; +#endif + setup_uarts(uart_ids); +} + +#ifndef CONFIG_SYS_DCACHE_OFF +void enable_caches(void) +{ + /* Enable D-cache. I-cache is already enabled in start.S */ + dcache_enable(); +} +#endif |