smsc_fdc37m81x.c (4811B)
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/txx9/smsc_fdc37m81x.h> 17 18/* Common Registers */ 19#define SMSC_FDC37M81X_CONFIG_INDEX 0x00 20#define SMSC_FDC37M81X_CONFIG_DATA 0x01 21#define SMSC_FDC37M81X_CONF 0x02 22#define SMSC_FDC37M81X_INDEX 0x03 23#define SMSC_FDC37M81X_DNUM 0x07 24#define SMSC_FDC37M81X_DID 0x20 25#define SMSC_FDC37M81X_DREV 0x21 26#define SMSC_FDC37M81X_PCNT 0x22 27#define SMSC_FDC37M81X_PMGT 0x23 28#define SMSC_FDC37M81X_OSC 0x24 29#define SMSC_FDC37M81X_CONFPA0 0x26 30#define SMSC_FDC37M81X_CONFPA1 0x27 31#define SMSC_FDC37M81X_TEST4 0x2B 32#define SMSC_FDC37M81X_TEST5 0x2C 33#define SMSC_FDC37M81X_TEST1 0x2D 34#define SMSC_FDC37M81X_TEST2 0x2E 35#define SMSC_FDC37M81X_TEST3 0x2F 36 37/* Logical device numbers */ 38#define SMSC_FDC37M81X_FDD 0x00 39#define SMSC_FDC37M81X_SERIAL1 0x04 40#define SMSC_FDC37M81X_SERIAL2 0x05 41#define SMSC_FDC37M81X_KBD 0x07 42 43/* Logical device Config Registers */ 44#define SMSC_FDC37M81X_ACTIVE 0x30 45#define SMSC_FDC37M81X_BASEADDR0 0x60 46#define SMSC_FDC37M81X_BASEADDR1 0x61 47#define SMSC_FDC37M81X_INT 0x70 48#define SMSC_FDC37M81X_INT2 0x72 49#define SMSC_FDC37M81X_MODE 0xF0 50 51/* Chip Config Values */ 52#define SMSC_FDC37M81X_CONFIG_ENTER 0x55 53#define SMSC_FDC37M81X_CONFIG_EXIT 0xaa 54#define SMSC_FDC37M81X_CHIP_ID 0x4d 55 56static unsigned long g_smsc_fdc37m81x_base; 57 58static inline unsigned char smsc_fdc37m81x_rd(unsigned char index) 59{ 60 outb(index, g_smsc_fdc37m81x_base + SMSC_FDC37M81X_CONFIG_INDEX); 61 62 return inb(g_smsc_fdc37m81x_base + SMSC_FDC37M81X_CONFIG_DATA); 63} 64 65static inline void smsc_dc37m81x_wr(unsigned char index, unsigned char data) 66{ 67 outb(index, g_smsc_fdc37m81x_base + SMSC_FDC37M81X_CONFIG_INDEX); 68 outb(data, g_smsc_fdc37m81x_base + SMSC_FDC37M81X_CONFIG_DATA); 69} 70 71void smsc_fdc37m81x_config_beg(void) 72{ 73 if (g_smsc_fdc37m81x_base) { 74 outb(SMSC_FDC37M81X_CONFIG_ENTER, 75 g_smsc_fdc37m81x_base + SMSC_FDC37M81X_CONFIG_INDEX); 76 } 77} 78 79void smsc_fdc37m81x_config_end(void) 80{ 81 if (g_smsc_fdc37m81x_base) 82 outb(SMSC_FDC37M81X_CONFIG_EXIT, 83 g_smsc_fdc37m81x_base + SMSC_FDC37M81X_CONFIG_INDEX); 84} 85 86u8 smsc_fdc37m81x_config_get(u8 reg) 87{ 88 u8 val = 0; 89 90 if (g_smsc_fdc37m81x_base) 91 val = smsc_fdc37m81x_rd(reg); 92 93 return val; 94} 95 96void smsc_fdc37m81x_config_set(u8 reg, u8 val) 97{ 98 if (g_smsc_fdc37m81x_base) 99 smsc_dc37m81x_wr(reg, val); 100} 101 102unsigned long __init smsc_fdc37m81x_init(unsigned long port) 103{ 104 const int field = sizeof(unsigned long) * 2; 105 u8 chip_id; 106 107 if (g_smsc_fdc37m81x_base) 108 pr_warn("%s: stepping on old base=0x%0*lx\n", __func__, field, 109 g_smsc_fdc37m81x_base); 110 111 g_smsc_fdc37m81x_base = port; 112 113 smsc_fdc37m81x_config_beg(); 114 115 chip_id = smsc_fdc37m81x_rd(SMSC_FDC37M81X_DID); 116 if (chip_id == SMSC_FDC37M81X_CHIP_ID) 117 smsc_fdc37m81x_config_end(); 118 else { 119 pr_warn("%s: unknown chip id 0x%02x\n", __func__, chip_id); 120 g_smsc_fdc37m81x_base = 0; 121 } 122 123 return g_smsc_fdc37m81x_base; 124} 125 126#ifdef DEBUG 127static void smsc_fdc37m81x_config_dump_one(const char *key, u8 dev, u8 reg) 128{ 129 pr_info("%s: dev=0x%02x reg=0x%02x val=0x%02x\n", key, dev, reg, 130 smsc_fdc37m81x_rd(reg)); 131} 132 133void smsc_fdc37m81x_config_dump(void) 134{ 135 u8 orig; 136 const char *fname = __func__; 137 138 smsc_fdc37m81x_config_beg(); 139 140 orig = smsc_fdc37m81x_rd(SMSC_FDC37M81X_DNUM); 141 142 pr_info("%s: common\n", fname); 143 smsc_fdc37m81x_config_dump_one(fname, SMSC_FDC37M81X_NONE, 144 SMSC_FDC37M81X_DNUM); 145 smsc_fdc37m81x_config_dump_one(fname, SMSC_FDC37M81X_NONE, 146 SMSC_FDC37M81X_DID); 147 smsc_fdc37m81x_config_dump_one(fname, SMSC_FDC37M81X_NONE, 148 SMSC_FDC37M81X_DREV); 149 smsc_fdc37m81x_config_dump_one(fname, SMSC_FDC37M81X_NONE, 150 SMSC_FDC37M81X_PCNT); 151 smsc_fdc37m81x_config_dump_one(fname, SMSC_FDC37M81X_NONE, 152 SMSC_FDC37M81X_PMGT); 153 154 pr_info("%s: keyboard\n", fname); 155 smsc_dc37m81x_wr(SMSC_FDC37M81X_DNUM, SMSC_FDC37M81X_KBD); 156 smsc_fdc37m81x_config_dump_one(fname, SMSC_FDC37M81X_KBD, 157 SMSC_FDC37M81X_ACTIVE); 158 smsc_fdc37m81x_config_dump_one(fname, SMSC_FDC37M81X_KBD, 159 SMSC_FDC37M81X_INT); 160 smsc_fdc37m81x_config_dump_one(fname, SMSC_FDC37M81X_KBD, 161 SMSC_FDC37M81X_INT2); 162 smsc_fdc37m81x_config_dump_one(fname, SMSC_FDC37M81X_KBD, 163 SMSC_FDC37M81X_LDCR_F0); 164 165 smsc_dc37m81x_wr(SMSC_FDC37M81X_DNUM, orig); 166 167 smsc_fdc37m81x_config_end(); 168} 169#endif