arch/mips/txx9/generic/smsc_fdc37m81x.c

Source file repositories/reference/linux-study-clean/arch/mips/txx9/generic/smsc_fdc37m81x.c

File Facts

System
Linux kernel
Corpus path
arch/mips/txx9/generic/smsc_fdc37m81x.c
Extension
.c
Size
4811 bytes
Lines
170
Domain
Architecture Layer
Bucket
arch/mips
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

#include <linux/init.h>
#include <linux/types.h>
#include <asm/io.h>
#include <asm/txx9/smsc_fdc37m81x.h>

/* Common Registers */
#define SMSC_FDC37M81X_CONFIG_INDEX  0x00
#define SMSC_FDC37M81X_CONFIG_DATA   0x01
#define SMSC_FDC37M81X_CONF	     0x02
#define SMSC_FDC37M81X_INDEX	     0x03
#define SMSC_FDC37M81X_DNUM	     0x07
#define SMSC_FDC37M81X_DID	     0x20
#define SMSC_FDC37M81X_DREV	     0x21
#define SMSC_FDC37M81X_PCNT	     0x22
#define SMSC_FDC37M81X_PMGT	     0x23
#define SMSC_FDC37M81X_OSC	     0x24
#define SMSC_FDC37M81X_CONFPA0	     0x26
#define SMSC_FDC37M81X_CONFPA1	     0x27
#define SMSC_FDC37M81X_TEST4	     0x2B
#define SMSC_FDC37M81X_TEST5	     0x2C
#define SMSC_FDC37M81X_TEST1	     0x2D
#define SMSC_FDC37M81X_TEST2	     0x2E
#define SMSC_FDC37M81X_TEST3	     0x2F

/* Logical device numbers */
#define SMSC_FDC37M81X_FDD	     0x00
#define SMSC_FDC37M81X_SERIAL1	     0x04
#define SMSC_FDC37M81X_SERIAL2	     0x05
#define SMSC_FDC37M81X_KBD	     0x07

/* Logical device Config Registers */
#define SMSC_FDC37M81X_ACTIVE	     0x30
#define SMSC_FDC37M81X_BASEADDR0     0x60
#define SMSC_FDC37M81X_BASEADDR1     0x61
#define SMSC_FDC37M81X_INT	     0x70
#define SMSC_FDC37M81X_INT2	     0x72
#define SMSC_FDC37M81X_MODE	     0xF0

/* Chip Config Values */
#define SMSC_FDC37M81X_CONFIG_ENTER  0x55
#define SMSC_FDC37M81X_CONFIG_EXIT   0xaa
#define SMSC_FDC37M81X_CHIP_ID	     0x4d

static unsigned long g_smsc_fdc37m81x_base;

static inline unsigned char smsc_fdc37m81x_rd(unsigned char index)
{
	outb(index, g_smsc_fdc37m81x_base + SMSC_FDC37M81X_CONFIG_INDEX);

	return inb(g_smsc_fdc37m81x_base + SMSC_FDC37M81X_CONFIG_DATA);
}

static inline void smsc_dc37m81x_wr(unsigned char index, unsigned char data)
{
	outb(index, g_smsc_fdc37m81x_base + SMSC_FDC37M81X_CONFIG_INDEX);
	outb(data, g_smsc_fdc37m81x_base + SMSC_FDC37M81X_CONFIG_DATA);
}

void smsc_fdc37m81x_config_beg(void)
{
	if (g_smsc_fdc37m81x_base) {
		outb(SMSC_FDC37M81X_CONFIG_ENTER,
		     g_smsc_fdc37m81x_base + SMSC_FDC37M81X_CONFIG_INDEX);
	}
}

void smsc_fdc37m81x_config_end(void)
{
	if (g_smsc_fdc37m81x_base)
		outb(SMSC_FDC37M81X_CONFIG_EXIT,
		     g_smsc_fdc37m81x_base + SMSC_FDC37M81X_CONFIG_INDEX);
}

u8 smsc_fdc37m81x_config_get(u8 reg)
{
	u8 val = 0;

	if (g_smsc_fdc37m81x_base)
		val = smsc_fdc37m81x_rd(reg);

	return val;
}

void smsc_fdc37m81x_config_set(u8 reg, u8 val)
{
	if (g_smsc_fdc37m81x_base)
		smsc_dc37m81x_wr(reg, val);
}

unsigned long __init smsc_fdc37m81x_init(unsigned long port)

Annotation

Implementation Notes