drivers/misc/ibmasm/lowlevel.h

Source file repositories/reference/linux-study-clean/drivers/misc/ibmasm/lowlevel.h

File Facts

System
Linux kernel
Corpus path
drivers/misc/ibmasm/lowlevel.h
Extension
.h
Size
3063 bytes
Lines
124
Domain
Driver Families
Bucket
drivers/misc
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

#ifndef __IBMASM_CONDOR_H__
#define __IBMASM_CONDOR_H__

#include <asm/io.h>

#define VENDORID_IBM	0x1014
#define DEVICEID_RSA	0x010F

#define GET_MFA_ADDR(x)  (x & 0xFFFFFF00)

#define MAILBOX_FULL(x)  (x & 0x00000001)

#define NO_MFAS_AVAILABLE     0xFFFFFFFF


#define INBOUND_QUEUE_PORT   0x40  /* contains address of next free MFA */
#define OUTBOUND_QUEUE_PORT  0x44  /* contains address of posted MFA    */

#define SP_INTR_MASK	0x00000008
#define UART_INTR_MASK	0x00000010

#define INTR_STATUS_REGISTER   0x13A0
#define INTR_CONTROL_REGISTER  0x13A4

#define SCOUT_COM_A_BASE         0x0000
#define SCOUT_COM_B_BASE         0x0100
#define SCOUT_COM_C_BASE         0x0200
#define SCOUT_COM_D_BASE         0x0300

static inline int sp_interrupt_pending(void __iomem *base_address)
{
	return SP_INTR_MASK & readl(base_address + INTR_STATUS_REGISTER);
}

static inline int uart_interrupt_pending(void __iomem *base_address)
{
	return UART_INTR_MASK & readl(base_address + INTR_STATUS_REGISTER);
}

static inline void ibmasm_enable_interrupts(void __iomem *base_address, int mask)
{
	void __iomem *ctrl_reg = base_address + INTR_CONTROL_REGISTER;
	writel( readl(ctrl_reg) & ~mask, ctrl_reg);
}

static inline void ibmasm_disable_interrupts(void __iomem *base_address, int mask)
{
	void __iomem *ctrl_reg = base_address + INTR_CONTROL_REGISTER;
	writel( readl(ctrl_reg) | mask, ctrl_reg);
}

static inline void enable_sp_interrupts(void __iomem *base_address)
{
	ibmasm_enable_interrupts(base_address, SP_INTR_MASK);
}

static inline void disable_sp_interrupts(void __iomem *base_address)
{
	ibmasm_disable_interrupts(base_address, SP_INTR_MASK);
}

static inline void enable_uart_interrupts(void __iomem *base_address)
{
	ibmasm_enable_interrupts(base_address, UART_INTR_MASK);
}

static inline void disable_uart_interrupts(void __iomem *base_address)
{
	ibmasm_disable_interrupts(base_address, UART_INTR_MASK);
}

#define valid_mfa(mfa)	( (mfa) != NO_MFAS_AVAILABLE )

static inline u32 get_mfa_outbound(void __iomem *base_address)
{
	int retry;
	u32 mfa;

	for (retry=0; retry<=10; retry++) {
		mfa = readl(base_address + OUTBOUND_QUEUE_PORT);
		if (valid_mfa(mfa))
			break;
	}
	return mfa;
}

static inline void set_mfa_outbound(void __iomem *base_address, u32 mfa)
{
	writel(mfa, base_address + OUTBOUND_QUEUE_PORT);
}

Annotation

Implementation Notes