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Diffstat (limited to 'arch/arm/boards/omap/board-omap3evm.c')
| -rw-r--r-- | arch/arm/boards/omap/board-omap3evm.c | 275 |
1 files changed, 275 insertions, 0 deletions
diff --git a/arch/arm/boards/omap/board-omap3evm.c b/arch/arm/boards/omap/board-omap3evm.c new file mode 100644 index 0000000000..619ea94485 --- /dev/null +++ b/arch/arm/boards/omap/board-omap3evm.c @@ -0,0 +1,275 @@ +/** + * @file + * @brief Board Initialization routines for OMAP3EVM. + * + * FileName: arch/arm/boards/omap/board-omap3evm.c + * + * This board is based on OMAP3530. + * More on OMAP3530 (including documentation can be found here): + * http://focus.ti.com/docs/prod/folders/print/omap3530.html + * + * This file provides initialization in two stages: + * @li Boot time initialization - just get SDRAM working. + * This is run from SRAM - so no case constructs and global vars can be used. + * @li Run time initialization - this is for the rest of the initializations + * such as flash, uart etc. + * + * Boot time initialization includes: + * @li SDRAM initialization. + * @li Pin Muxing relevant for the EVM. + * + * Run time initialization includes + * @li serial @ref serial_ns16550.c driver device definition + * + * Originally from arch/arm/boards/omap/board-beagle.c + */ + +/* + * Copyright (C) 2009 Texas Instruments Incorporated - http://www.ti.com/ + * Sanjeev Premi <premi@ti.com> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * version 2 as published by the Free Software Foundation. + * + * 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 <console.h> +#include <init.h> +#include <driver.h> +#include <asm/io.h> +#include <ns16550.h> +#include <asm/armlinux.h> +#include <mach/silicon.h> +#include <mach/sdrc.h> +#include <mach/sys_info.h> +#include <mach/syslib.h> +#include <mach/control.h> +#include <mach/omap3-mux.h> +#include <mach/gpmc.h> +#include "board.h" + + +/* + * Boot-time initialization(s) + */ + +/** + * @brief Initialize the SDRC module + * + * @return void + */ +static void sdrc_init(void) +{ + /* SDRAM software reset */ + /* No idle ack and RESET enable */ + writel(0x1A, SDRC_REG(SYSCONFIG)); + sdelay(100); + /* No idle ack and RESET disable */ + writel(0x18, SDRC_REG(SYSCONFIG)); + + /* SDRC Sharing register */ + /* 32-bit SDRAM on data lane [31:0] - CS0 */ + /* pin tri-stated = 1 */ + writel(0x00000100, SDRC_REG(SHARING)); + + /* ----- SDRC Registers Configuration --------- */ + /* SDRC_MCFG0 register */ + writel(0x02584099, SDRC_REG(MCFG_0)); + + /* SDRC_RFR_CTRL0 register */ + writel(0x54601, SDRC_REG(RFR_CTRL_0)); + + /* SDRC_ACTIM_CTRLA0 register */ + writel(0xA29DB4C6, SDRC_REG(ACTIM_CTRLA_0)); + + /* SDRC_ACTIM_CTRLB0 register */ + writel(0x12214, SDRC_REG(ACTIM_CTRLB_0)); + + /* Disble Power Down of CKE due to 1 CKE on combo part */ + writel(0x00000081, SDRC_REG(POWER)); + + /* SDRC_MANUAL command register */ + /* NOP command */ + writel(0x00000000, SDRC_REG(MANUAL_0)); + /* Precharge command */ + writel(0x00000001, SDRC_REG(MANUAL_0)); + /* Auto-refresh command */ + writel(0x00000002, SDRC_REG(MANUAL_0)); + /* Auto-refresh command */ + writel(0x00000002, SDRC_REG(MANUAL_0)); + + /* SDRC MR0 register Burst length=4 */ + writel(0x00000032, SDRC_REG(MR_0)); + + /* SDRC DLLA control register */ + writel(0x0000000A, SDRC_REG(DLLA_CTRL)); + + return; +} + +/** + * @brief Do the necessary pin muxing required for OMAP3EVM. Some pins in OMAP3 + * do not have alternate modes. We don't program these pins. + * + * See @ref MUX_VAL for description of the muxing mode. + * + * @return void + */ +static void mux_config(void) +{ + /* + * SDRC + * - SDRC_D0-SDRC_D31: Default MUX mode is mode0. + */ + + /* + * GPMC + * - GPMC_D0-GPMC_D7: Default MUX mode is mode0. + * - GPMC_NADV_ALE: Default MUX mode is mode0. + * - GPMC_NOE: Default MUX mode is mode0. + * - GPMC_NWE: Default MUX mode is mode0. + * - GPMC_WAIT0: Default MUX mode is mode0. + */ + MUX_VAL(CP(GPMC_A1), (IDIS | PTD | DIS | M0)); + MUX_VAL(CP(GPMC_A2), (IDIS | PTD | DIS | M0)); + MUX_VAL(CP(GPMC_A3), (IDIS | PTD | DIS | M0)); + MUX_VAL(CP(GPMC_A4), (IDIS | PTD | DIS | M0)); + MUX_VAL(CP(GPMC_A5), (IDIS | PTD | DIS | M0)); + MUX_VAL(CP(GPMC_A6), (IDIS | PTD | DIS | M0)); + MUX_VAL(CP(GPMC_A7), (IDIS | PTD | DIS | M0)); + MUX_VAL(CP(GPMC_A8), (IDIS | PTD | DIS | M0)); + MUX_VAL(CP(GPMC_A9), (IDIS | PTD | DIS | M0)); + MUX_VAL(CP(GPMC_A10), (IDIS | PTD | DIS | M0)); + + MUX_VAL(CP(GPMC_D8), (IEN | PTD | DIS | M0)); + MUX_VAL(CP(GPMC_D9), (IEN | PTD | DIS | M0)); + MUX_VAL(CP(GPMC_D10), (IEN | PTD | DIS | M0)); + MUX_VAL(CP(GPMC_D11), (IEN | PTD | DIS | M0)); + MUX_VAL(CP(GPMC_D12), (IEN | PTD | DIS | M0)); + MUX_VAL(CP(GPMC_D13), (IEN | PTD | DIS | M0)); + MUX_VAL(CP(GPMC_D14), (IEN | PTD | DIS | M0)); + MUX_VAL(CP(GPMC_D15), (IEN | PTD | DIS | M0)); + MUX_VAL(CP(GPMC_CLK), (IDIS | PTD | DIS | M0)); + + MUX_VAL(CP(GPMC_NBE0_CLE), (IDIS | PTD | DIS | M0)); + MUX_VAL(CP(GPMC_NBE1), (IEN | PTD | DIS | M0)); + MUX_VAL(CP(GPMC_NWP), (IEN | PTD | DIS | M0)); + + MUX_VAL(CP(GPMC_WAIT1), (IEN | PTU | EN | M0)); + + /* + * Serial Interface + */ +#if defined(CONFIG_OMAP3EVM_UART1) + MUX_VAL(CP(UART1_TX), (IDIS | PTD | DIS | M0)); + MUX_VAL(CP(UART1_RTS), (IDIS | PTD | DIS | M0)); + MUX_VAL(CP(UART1_CTS), (IEN | PTU | DIS | M0)); + MUX_VAL(CP(UART1_RX), (IEN | PTD | DIS | M0)); +#elif defined(CONFIG_OMAP3EVM_UART3) + MUX_VAL(CP(UART3_CTS_RCTX), (IEN | PTD | EN | M0)); + MUX_VAL(CP(UART3_RTS_SD), (IDIS | PTD | DIS | M0)); + MUX_VAL(CP(UART3_RX_IRRX), (IEN | PTD | DIS | M0)); + MUX_VAL(CP(UART3_TX_IRTX), (IDIS | PTD | DIS | M0)); +#endif +} + +/** + * @brief The basic entry point for board initialization. + * + * This is called as part of machine init (after arch init). + * This is again called with stack in SRAM, so not too many + * constructs possible here. + * + * @return void + */ +void board_init(void) +{ + int in_sdram = running_in_sdram(); + + mux_config(); + /* Dont reconfigure SDRAM while running in SDRAM! */ + if (!in_sdram) + sdrc_init(); +} + +/* + * Run-time initialization(s) + */ + +#ifdef CONFIG_DRIVER_SERIAL_NS16550 + +static struct NS16550_plat serial_plat = { + .clock = 48000000, /* 48MHz (APLL96/2) */ + .f_caps = CONSOLE_STDIN | CONSOLE_STDOUT | CONSOLE_STDERR, + .reg_read = omap_uart_read, + .reg_write = omap_uart_write, +}; + +static struct device_d omap3evm_serial_device = { + .name = "serial_ns16550", +#if defined(CONFIG_OMAP3EVM_UART1) + .map_base = OMAP_UART1_BASE, +#elif defined(CONFIG_OMAP3EVM_UART3) + .map_base = OMAP_UART3_BASE, +#endif + .size = 1024, + .platform_data = (void *)&serial_plat, +}; + +/** + * @brief Initialize the serial port to be used as console. + * + * @return result of device registration + */ +static int omap3evm_init_console(void) +{ + return register_device(&omap3evm_serial_device); +} +console_initcall(omap3evm_init_console); +#endif /* CONFIG_DRIVER_SERIAL_NS16550 */ + +static struct memory_platform_data sram_pdata = { + .name = "ram0", + .flags = DEVFS_RDWR, +}; + +static struct device_d sdram_dev = { + .name = "mem", + .map_base = 0x80000000, + .size = 128 * 1024 * 1024, + .platform_data = &sram_pdata, +}; + +static int omap3evm_init_devices(void) +{ + int ret; + + ret = register_device(&sdram_dev); + if (ret) + goto failed; + +#ifdef CONFIG_GPMC + /* + * WP is made high and WAIT1 active Low + */ + gpmc_generic_init(0x10); +#endif + + armlinux_add_dram(&sdram_dev); + +failed: + return ret; +} +device_initcall(omap3evm_init_devices); |