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169 lines
4.7 KiB
169 lines
4.7 KiB
/* |
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* Interface for smsc fdc48m81x Super IO chip |
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* |
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* Author: MontaVista Software, Inc. [email protected] |
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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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