1/* 2 * board.c: STB225 board support. 3 * 4 * Copyright 2008 NXP Semiconductors 5 * Chris Steel <chris.steel@nxp.com> 6 * Daniel Laird <daniel.j.laird@nxp.com> 7 * 8 * Based on software written by: 9 * Nikita Youshchenko <yoush@debian.org>, based on PNX8550 code. 10 * 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of the GNU General Public License as published by 13 * the Free Software Foundation; either version 2 of the License, or 14 * (at your option) any later version. 15 * 16 * This program is distributed in the hope that it will be useful, 17 * but WITHOUT ANY WARRANTY; without even the implied warranty of 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 19 * GNU General Public License for more details. 20 * 21 * You should have received a copy of the GNU General Public License 22 * along with this program; if not, write to the Free Software 23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 24 */ 25#include <linux/init.h> 26#include <asm/bootinfo.h> 27#include <linux/mm.h> 28#include <pnx833x.h> 29#include <gpio.h> 30 31/* endianess twiddlers */ 32#define PNX8335_DEBUG0 0x4400 33#define PNX8335_DEBUG1 0x4404 34#define PNX8335_DEBUG2 0x4408 35#define PNX8335_DEBUG3 0x440c 36#define PNX8335_DEBUG4 0x4410 37#define PNX8335_DEBUG5 0x4414 38#define PNX8335_DEBUG6 0x4418 39#define PNX8335_DEBUG7 0x441c 40 41int prom_argc; 42char **prom_argv, **prom_envp; 43 44extern void prom_init_cmdline(void); 45extern char *prom_getenv(char *envname); 46 47const char *get_system_type(void) 48{ 49 return "NXP STB22x"; 50} 51 52static inline unsigned long env_or_default(char *env, unsigned long dfl) 53{ 54 char *str = prom_getenv(env); 55 return str ? simple_strtol(str, 0, 0) : dfl; 56} 57 58void __init prom_init(void) 59{ 60 unsigned long memsize; 61 62 prom_argc = fw_arg0; 63 prom_argv = (char **)fw_arg1; 64 prom_envp = (char **)fw_arg2; 65 66 prom_init_cmdline(); 67 68 memsize = env_or_default("memsize", 0x02000000); 69 add_memory_region(0, memsize, BOOT_MEM_RAM); 70} 71 72void __init pnx833x_board_setup(void) 73{ 74 pnx833x_gpio_select_function_alt(4); 75 pnx833x_gpio_select_output(4); 76 pnx833x_gpio_select_function_alt(5); 77 pnx833x_gpio_select_input(5); 78 pnx833x_gpio_select_function_alt(6); 79 pnx833x_gpio_select_input(6); 80 pnx833x_gpio_select_function_alt(7); 81 pnx833x_gpio_select_output(7); 82 83 pnx833x_gpio_select_function_alt(25); 84 pnx833x_gpio_select_function_alt(26); 85 86 pnx833x_gpio_select_function_alt(27); 87 pnx833x_gpio_select_function_alt(28); 88 pnx833x_gpio_select_function_alt(29); 89 pnx833x_gpio_select_function_alt(30); 90 pnx833x_gpio_select_function_alt(31); 91 pnx833x_gpio_select_function_alt(32); 92 pnx833x_gpio_select_function_alt(33); 93 94#if defined(CONFIG_MTD_NAND_PLATFORM) || defined(CONFIG_MTD_NAND_PLATFORM_MODULE) 95 /* Setup MIU for NAND access on CS0... 96 * 97 * (it seems that we must also configure CS1 for reliable operation, 98 * otherwise the first read ID command will fail if it's read as 4 bytes 99 * but pass if it's read as 1 word.) 100 */ 101 102 /* Setup MIU CS0 & CS1 timing */ 103 PNX833X_MIU_SEL0 = 0; 104 PNX833X_MIU_SEL1 = 0; 105 PNX833X_MIU_SEL0_TIMING = 0x50003081; 106 PNX833X_MIU_SEL1_TIMING = 0x50003081; 107 108 /* Setup GPIO 00 for use as MIU CS1 (CS0 is not multiplexed, so does not need this) */ 109 pnx833x_gpio_select_function_alt(0); 110 111 /* Setup GPIO 04 to input NAND read/busy signal */ 112 pnx833x_gpio_select_function_io(4); 113 pnx833x_gpio_select_input(4); 114 115 /* Setup GPIO 05 to disable NAND write protect */ 116 pnx833x_gpio_select_function_io(5); 117 pnx833x_gpio_select_output(5); 118 pnx833x_gpio_write(1, 5); 119 120#elif defined(CONFIG_MTD_CFI) || defined(CONFIG_MTD_CFI_MODULE) 121 122 /* Set up MIU for 16-bit NOR access on CS0 and CS1... */ 123 124 /* Setup MIU CS0 & CS1 timing */ 125 PNX833X_MIU_SEL0 = 1; 126 PNX833X_MIU_SEL1 = 1; 127 PNX833X_MIU_SEL0_TIMING = 0x6A08D082; 128 PNX833X_MIU_SEL1_TIMING = 0x6A08D082; 129 130 /* Setup GPIO 00 for use as MIU CS1 (CS0 is not multiplexed, so does not need this) */ 131 pnx833x_gpio_select_function_alt(0); 132#endif 133} 134