1/* 2 * Interface for smsc fdc48m81x Super IO chip 3 * 4 * Author: MontaVista Software, Inc. source@mvista.com 5 * 6 * 2001-2003 (c) MontaVista Software, Inc. This file is licensed under 7 * the terms of the GNU General Public License version 2. This program 8 * is licensed "as is" without any warranty of any kind, whether express 9 * or implied. 10 * 11 * Copyright 2004 (c) MontaVista Software, Inc. 12 */ 13#include <linux/init.h> 14#include <linux/types.h> 15#include <asm/io.h> 16#include <asm/tx4927/smsc_fdc37m81x.h> 17 18#define DEBUG 19 20/* Common Registers */ 21#define SMSC_FDC37M81X_CONFIG_INDEX 0x00 22#define SMSC_FDC37M81X_CONFIG_DATA 0x01 23#define SMSC_FDC37M81X_CONF 0x02 24#define SMSC_FDC37M81X_INDEX 0x03 25#define SMSC_FDC37M81X_DNUM 0x07 26#define SMSC_FDC37M81X_DID 0x20 27#define SMSC_FDC37M81X_DREV 0x21 28#define SMSC_FDC37M81X_PCNT 0x22 29#define SMSC_FDC37M81X_PMGT 0x23 30#define SMSC_FDC37M81X_OSC 0x24 31#define SMSC_FDC37M81X_CONFPA0 0x26 32#define SMSC_FDC37M81X_CONFPA1 0x27 33#define SMSC_FDC37M81X_TEST4 0x2B 34#define SMSC_FDC37M81X_TEST5 0x2C 35#define SMSC_FDC37M81X_TEST1 0x2D 36#define SMSC_FDC37M81X_TEST2 0x2E 37#define SMSC_FDC37M81X_TEST3 0x2F 38 39/* Logical device numbers */ 40#define SMSC_FDC37M81X_FDD 0x00 41#define SMSC_FDC37M81X_SERIAL1 0x04 42#define SMSC_FDC37M81X_SERIAL2 0x05 43#define SMSC_FDC37M81X_KBD 0x07 44 45/* Logical device Config Registers */ 46#define SMSC_FDC37M81X_ACTIVE 0x30 47#define SMSC_FDC37M81X_BASEADDR0 0x60 48#define SMSC_FDC37M81X_BASEADDR1 0x61 49#define SMSC_FDC37M81X_INT 0x70 50#define SMSC_FDC37M81X_INT2 0x72 51#define SMSC_FDC37M81X_MODE 0xF0 52 53/* Chip Config Values */ 54#define SMSC_FDC37M81X_CONFIG_ENTER 0x55 55#define SMSC_FDC37M81X_CONFIG_EXIT 0xaa 56#define SMSC_FDC37M81X_CHIP_ID 0x4d 57 58static unsigned long g_smsc_fdc37m81x_base = 0; 59 60static inline unsigned char smsc_fdc37m81x_rd(unsigned char index) 61{ 62 outb(index, g_smsc_fdc37m81x_base + SMSC_FDC37M81X_CONFIG_INDEX); 63 64 return inb(g_smsc_fdc37m81x_base + SMSC_FDC37M81X_CONFIG_DATA); 65} 66 67static inline void smsc_dc37m81x_wr(unsigned char index, unsigned char data) 68{ 69 outb(index, g_smsc_fdc37m81x_base + SMSC_FDC37M81X_CONFIG_INDEX); 70 outb(data, g_smsc_fdc37m81x_base + SMSC_FDC37M81X_CONFIG_DATA); 71} 72 73void smsc_fdc37m81x_config_beg(void) 74{ 75 if (g_smsc_fdc37m81x_base) { 76 outb(SMSC_FDC37M81X_CONFIG_ENTER, 77 g_smsc_fdc37m81x_base + SMSC_FDC37M81X_CONFIG_INDEX); 78 } 79} 80 81void smsc_fdc37m81x_config_end(void) 82{ 83 if (g_smsc_fdc37m81x_base) 84 outb(SMSC_FDC37M81X_CONFIG_EXIT, 85 g_smsc_fdc37m81x_base + SMSC_FDC37M81X_CONFIG_INDEX); 86} 87 88u8 smsc_fdc37m81x_config_get(u8 reg) 89{ 90 u8 val = 0; 91 92 if (g_smsc_fdc37m81x_base) 93 val = smsc_fdc37m81x_rd(reg); 94 95 return val; 96} 97 98void smsc_fdc37m81x_config_set(u8 reg, u8 val) 99{ 100 if (g_smsc_fdc37m81x_base) 101 smsc_dc37m81x_wr(reg, val); 102} 103 104unsigned long __init smsc_fdc37m81x_init(unsigned long port) 105{ 106 const int field = sizeof(unsigned long) * 2; 107 u8 chip_id; 108 109 if (g_smsc_fdc37m81x_base) 110 printk("smsc_fdc37m81x_init() stepping on old base=0x%0*lx\n", 111 field, g_smsc_fdc37m81x_base); 112 113 g_smsc_fdc37m81x_base = port; 114 115 smsc_fdc37m81x_config_beg(); 116 117 chip_id = smsc_fdc37m81x_rd(SMSC_FDC37M81X_DID); 118 if (chip_id == SMSC_FDC37M81X_CHIP_ID) 119 smsc_fdc37m81x_config_end(); 120 else { 121 printk("smsc_fdc37m81x_init() unknow chip id 0x%02x\n", 122 chip_id); 123 g_smsc_fdc37m81x_base = 0; 124 } 125 126 return g_smsc_fdc37m81x_base; 127} 128 129#ifdef DEBUG 130void smsc_fdc37m81x_config_dump_one(char *key, u8 dev, u8 reg) 131{ 132 printk("%s: dev=0x%02x reg=0x%02x val=0x%02x\n", key, dev, reg, 133 smsc_fdc37m81x_rd(reg)); 134} 135 136void smsc_fdc37m81x_config_dump(void) 137{ 138 u8 orig; 139 char *fname = "smsc_fdc37m81x_config_dump()"; 140 141 smsc_fdc37m81x_config_beg(); 142 143 orig = smsc_fdc37m81x_rd(SMSC_FDC37M81X_DNUM); 144 145 printk("%s: common\n", fname); 146 smsc_fdc37m81x_config_dump_one(fname, SMSC_FDC37M81X_NONE, 147 SMSC_FDC37M81X_DNUM); 148 smsc_fdc37m81x_config_dump_one(fname, SMSC_FDC37M81X_NONE, 149 SMSC_FDC37M81X_DID); 150 smsc_fdc37m81x_config_dump_one(fname, SMSC_FDC37M81X_NONE, 151 SMSC_FDC37M81X_DREV); 152 smsc_fdc37m81x_config_dump_one(fname, SMSC_FDC37M81X_NONE, 153 SMSC_FDC37M81X_PCNT); 154 smsc_fdc37m81x_config_dump_one(fname, SMSC_FDC37M81X_NONE, 155 SMSC_FDC37M81X_PMGT); 156 157 printk("%s: keyboard\n", fname); 158 smsc_dc37m81x_wr(SMSC_FDC37M81X_DNUM, SMSC_FDC37M81X_KBD); 159 smsc_fdc37m81x_config_dump_one(fname, SMSC_FDC37M81X_KBD, 160 SMSC_FDC37M81X_ACTIVE); 161 smsc_fdc37m81x_config_dump_one(fname, SMSC_FDC37M81X_KBD, 162 SMSC_FDC37M81X_INT); 163 smsc_fdc37m81x_config_dump_one(fname, SMSC_FDC37M81X_KBD, 164 SMSC_FDC37M81X_INT2); 165 smsc_fdc37m81x_config_dump_one(fname, SMSC_FDC37M81X_KBD, 166 SMSC_FDC37M81X_LDCR_F0); 167 168 smsc_dc37m81x_wr(SMSC_FDC37M81X_DNUM, orig); 169 170 smsc_fdc37m81x_config_end(); 171} 172#endif 173