170 lines
4.7 KiB
C
170 lines
4.7 KiB
C
/*
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* Interface for smsc fdc48m81x Super IO chip
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*
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* Author: MontaVista Software, Inc. source@mvista.com
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*
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* 2001-2003 (c) MontaVista Software, Inc. This file is licensed under
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* the terms of the GNU General Public License version 2. This program
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* is licensed "as is" without any warranty of any kind, whether express
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* or implied.
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*
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* Copyright 2004 (c) MontaVista Software, Inc.
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*/
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#include <linux/init.h>
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#include <linux/types.h>
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#include <asm/io.h>
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#include <asm/txx9/smsc_fdc37m81x.h>
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/* Common Registers */
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#define SMSC_FDC37M81X_CONFIG_INDEX 0x00
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#define SMSC_FDC37M81X_CONFIG_DATA 0x01
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#define SMSC_FDC37M81X_CONF 0x02
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#define SMSC_FDC37M81X_INDEX 0x03
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#define SMSC_FDC37M81X_DNUM 0x07
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#define SMSC_FDC37M81X_DID 0x20
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#define SMSC_FDC37M81X_DREV 0x21
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#define SMSC_FDC37M81X_PCNT 0x22
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#define SMSC_FDC37M81X_PMGT 0x23
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#define SMSC_FDC37M81X_OSC 0x24
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#define SMSC_FDC37M81X_CONFPA0 0x26
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#define SMSC_FDC37M81X_CONFPA1 0x27
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#define SMSC_FDC37M81X_TEST4 0x2B
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#define SMSC_FDC37M81X_TEST5 0x2C
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#define SMSC_FDC37M81X_TEST1 0x2D
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#define SMSC_FDC37M81X_TEST2 0x2E
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#define SMSC_FDC37M81X_TEST3 0x2F
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/* Logical device numbers */
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#define SMSC_FDC37M81X_FDD 0x00
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#define SMSC_FDC37M81X_SERIAL1 0x04
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#define SMSC_FDC37M81X_SERIAL2 0x05
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#define SMSC_FDC37M81X_KBD 0x07
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/* Logical device Config Registers */
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#define SMSC_FDC37M81X_ACTIVE 0x30
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#define SMSC_FDC37M81X_BASEADDR0 0x60
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#define SMSC_FDC37M81X_BASEADDR1 0x61
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#define SMSC_FDC37M81X_INT 0x70
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#define SMSC_FDC37M81X_INT2 0x72
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#define SMSC_FDC37M81X_MODE 0xF0
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/* Chip Config Values */
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#define SMSC_FDC37M81X_CONFIG_ENTER 0x55
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#define SMSC_FDC37M81X_CONFIG_EXIT 0xaa
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#define SMSC_FDC37M81X_CHIP_ID 0x4d
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static unsigned long g_smsc_fdc37m81x_base;
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static inline unsigned char smsc_fdc37m81x_rd(unsigned char index)
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{
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outb(index, g_smsc_fdc37m81x_base + SMSC_FDC37M81X_CONFIG_INDEX);
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return inb(g_smsc_fdc37m81x_base + SMSC_FDC37M81X_CONFIG_DATA);
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}
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static inline void smsc_dc37m81x_wr(unsigned char index, unsigned char data)
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{
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outb(index, g_smsc_fdc37m81x_base + SMSC_FDC37M81X_CONFIG_INDEX);
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outb(data, g_smsc_fdc37m81x_base + SMSC_FDC37M81X_CONFIG_DATA);
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}
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void smsc_fdc37m81x_config_beg(void)
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{
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if (g_smsc_fdc37m81x_base) {
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outb(SMSC_FDC37M81X_CONFIG_ENTER,
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g_smsc_fdc37m81x_base + SMSC_FDC37M81X_CONFIG_INDEX);
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}
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}
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void smsc_fdc37m81x_config_end(void)
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{
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if (g_smsc_fdc37m81x_base)
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outb(SMSC_FDC37M81X_CONFIG_EXIT,
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g_smsc_fdc37m81x_base + SMSC_FDC37M81X_CONFIG_INDEX);
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}
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u8 smsc_fdc37m81x_config_get(u8 reg)
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{
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u8 val = 0;
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if (g_smsc_fdc37m81x_base)
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val = smsc_fdc37m81x_rd(reg);
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return val;
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}
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void smsc_fdc37m81x_config_set(u8 reg, u8 val)
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{
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if (g_smsc_fdc37m81x_base)
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smsc_dc37m81x_wr(reg, val);
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}
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unsigned long __init smsc_fdc37m81x_init(unsigned long port)
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{
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const int field = sizeof(unsigned long) * 2;
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u8 chip_id;
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if (g_smsc_fdc37m81x_base)
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pr_warn("%s: stepping on old base=0x%0*lx\n", __func__, field,
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g_smsc_fdc37m81x_base);
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g_smsc_fdc37m81x_base = port;
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smsc_fdc37m81x_config_beg();
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chip_id = smsc_fdc37m81x_rd(SMSC_FDC37M81X_DID);
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if (chip_id == SMSC_FDC37M81X_CHIP_ID)
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smsc_fdc37m81x_config_end();
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else {
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pr_warn("%s: unknown chip id 0x%02x\n", __func__, chip_id);
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g_smsc_fdc37m81x_base = 0;
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}
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return g_smsc_fdc37m81x_base;
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}
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#ifdef DEBUG
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static void smsc_fdc37m81x_config_dump_one(const char *key, u8 dev, u8 reg)
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{
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pr_info("%s: dev=0x%02x reg=0x%02x val=0x%02x\n", key, dev, reg,
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smsc_fdc37m81x_rd(reg));
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}
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void smsc_fdc37m81x_config_dump(void)
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{
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u8 orig;
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const char *fname = __func__;
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smsc_fdc37m81x_config_beg();
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orig = smsc_fdc37m81x_rd(SMSC_FDC37M81X_DNUM);
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pr_info("%s: common\n", fname);
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smsc_fdc37m81x_config_dump_one(fname, SMSC_FDC37M81X_NONE,
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SMSC_FDC37M81X_DNUM);
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smsc_fdc37m81x_config_dump_one(fname, SMSC_FDC37M81X_NONE,
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SMSC_FDC37M81X_DID);
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smsc_fdc37m81x_config_dump_one(fname, SMSC_FDC37M81X_NONE,
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SMSC_FDC37M81X_DREV);
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smsc_fdc37m81x_config_dump_one(fname, SMSC_FDC37M81X_NONE,
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SMSC_FDC37M81X_PCNT);
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smsc_fdc37m81x_config_dump_one(fname, SMSC_FDC37M81X_NONE,
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SMSC_FDC37M81X_PMGT);
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pr_info("%s: keyboard\n", fname);
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smsc_dc37m81x_wr(SMSC_FDC37M81X_DNUM, SMSC_FDC37M81X_KBD);
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smsc_fdc37m81x_config_dump_one(fname, SMSC_FDC37M81X_KBD,
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SMSC_FDC37M81X_ACTIVE);
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smsc_fdc37m81x_config_dump_one(fname, SMSC_FDC37M81X_KBD,
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SMSC_FDC37M81X_INT);
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smsc_fdc37m81x_config_dump_one(fname, SMSC_FDC37M81X_KBD,
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SMSC_FDC37M81X_INT2);
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smsc_fdc37m81x_config_dump_one(fname, SMSC_FDC37M81X_KBD,
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SMSC_FDC37M81X_LDCR_F0);
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smsc_dc37m81x_wr(SMSC_FDC37M81X_DNUM, orig);
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smsc_fdc37m81x_config_end();
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}
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#endif
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