1*4882a593Smuzhiyun /* 2*4882a593Smuzhiyun * Copyright 2008 Extreme Engineering Solutions, Inc. 3*4882a593Smuzhiyun * 4*4882a593Smuzhiyun * SPDX-License-Identifier: GPL-2.0+ 5*4882a593Smuzhiyun */ 6*4882a593Smuzhiyun 7*4882a593Smuzhiyun #include <common.h> 8*4882a593Smuzhiyun #include <asm/mmu.h> 9*4882a593Smuzhiyun #ifdef CONFIG_PCA953X 10*4882a593Smuzhiyun #include <pca953x.h> 11*4882a593Smuzhiyun 12*4882a593Smuzhiyun /* 13*4882a593Smuzhiyun * Determine if a board's flashes are write protected 14*4882a593Smuzhiyun */ board_flash_wp_on(void)15*4882a593Smuzhiyunint board_flash_wp_on(void) 16*4882a593Smuzhiyun { 17*4882a593Smuzhiyun if (pca953x_get_val(CONFIG_SYS_I2C_PCA953X_ADDR0) & 18*4882a593Smuzhiyun CONFIG_SYS_PCA953X_NVM_WP) 19*4882a593Smuzhiyun return 1; 20*4882a593Smuzhiyun 21*4882a593Smuzhiyun return 0; 22*4882a593Smuzhiyun } 23*4882a593Smuzhiyun #endif 24*4882a593Smuzhiyun 25*4882a593Smuzhiyun /* 26*4882a593Smuzhiyun * Return a board's derivative model number. For example: 27*4882a593Smuzhiyun * return 2 for the XPedite5372 and return 1 for the XPedite5201. 28*4882a593Smuzhiyun */ get_board_derivative(void)29*4882a593Smuzhiyunuint get_board_derivative(void) 30*4882a593Smuzhiyun { 31*4882a593Smuzhiyun #if defined(CONFIG_MPC85xx) 32*4882a593Smuzhiyun volatile ccsr_gur_t *gur = (void *)CONFIG_SYS_MPC85xx_GUTS_ADDR; 33*4882a593Smuzhiyun #elif defined(CONFIG_MPC86xx) 34*4882a593Smuzhiyun volatile immap_t *immap = (immap_t *)CONFIG_SYS_CCSRBAR; 35*4882a593Smuzhiyun volatile ccsr_gur_t *gur = &immap->im_gur; 36*4882a593Smuzhiyun #endif 37*4882a593Smuzhiyun 38*4882a593Smuzhiyun /* 39*4882a593Smuzhiyun * The top 4 lines of the local bus address are pulled low/high and 40*4882a593Smuzhiyun * can be read to determine the least significant digit of a board's 41*4882a593Smuzhiyun * model number. 42*4882a593Smuzhiyun */ 43*4882a593Smuzhiyun return gur->gpporcr >> 28; 44*4882a593Smuzhiyun } 45