1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * linux/arch/arm/mach-pxa/pxa2xx.c 4 * 5 * code specific to pxa2xx 6 * 7 * Copyright (C) 2008 Dmitry Baryshkov 8 */ 9 10 #include <linux/module.h> 11 #include <linux/kernel.h> 12 #include <linux/device.h> 13 #include <linux/io.h> 14 15 #include "pxa2xx-regs.h" 16 #include "mfp-pxa25x.h" 17 #include "generic.h" 18 #include "reset.h" 19 #include "smemc.h" 20 #include <linux/soc/pxa/smemc.h> 21 #include <linux/platform_data/irda-pxaficp.h> 22 23 void pxa2xx_clear_reset_status(unsigned int mask) 24 { 25 /* RESET_STATUS_* has a 1:1 mapping with RCSR */ 26 RCSR = mask; 27 } 28 29 static unsigned long pxa2xx_mfp_fir[] = { 30 GPIO46_FICP_RXD, 31 GPIO47_FICP_TXD, 32 }; 33 34 static unsigned long pxa2xx_mfp_sir[] = { 35 GPIO46_STUART_RXD, 36 GPIO47_STUART_TXD, 37 }; 38 39 static unsigned long pxa2xx_mfp_off[] = { 40 GPIO46_GPIO | MFP_LPM_DRIVE_LOW, 41 GPIO47_GPIO | MFP_LPM_DRIVE_LOW, 42 }; 43 44 void pxa2xx_transceiver_mode(struct device *dev, int mode) 45 { 46 if (mode & IR_OFF) { 47 pxa2xx_mfp_config(pxa2xx_mfp_off, ARRAY_SIZE(pxa2xx_mfp_off)); 48 } else if (mode & IR_SIRMODE) { 49 pxa2xx_mfp_config(pxa2xx_mfp_sir, ARRAY_SIZE(pxa2xx_mfp_sir)); 50 } else if (mode & IR_FIRMODE) { 51 pxa2xx_mfp_config(pxa2xx_mfp_fir, ARRAY_SIZE(pxa2xx_mfp_fir)); 52 } else 53 BUG(); 54 } 55 EXPORT_SYMBOL_GPL(pxa2xx_transceiver_mode); 56 57 #define MDCNFG_DRAC2(mdcnfg) (((mdcnfg) >> 21) & 0x3) 58 #define MDCNFG_DRAC0(mdcnfg) (((mdcnfg) >> 5) & 0x3) 59 60 int pxa2xx_smemc_get_sdram_rows(void) 61 { 62 static int sdram_rows; 63 unsigned int drac2 = 0, drac0 = 0; 64 u32 mdcnfg; 65 66 if (sdram_rows) 67 return sdram_rows; 68 69 mdcnfg = readl_relaxed(MDCNFG); 70 71 if (mdcnfg & (MDCNFG_DE2 | MDCNFG_DE3)) 72 drac2 = MDCNFG_DRAC2(mdcnfg); 73 74 if (mdcnfg & (MDCNFG_DE0 | MDCNFG_DE1)) 75 drac0 = MDCNFG_DRAC0(mdcnfg); 76 77 sdram_rows = 1 << (11 + max(drac0, drac2)); 78 return sdram_rows; 79 } 80