// SPDX-License-Identifier: GPL-2.0-only
/*
* Aic94xx SAS / SATA driver register access .
*
* Copyright ( C ) 2005 Adaptec , Inc . All rights reserved .
* Copyright ( C ) 2005 Luben Tuikov < luben_tuikov @ adaptec . com >
*/
#include <linux/pci.h>
#include "aic94xx_reg.h"
#include "aic94xx.h"
/* Writing to device address space.
* Offset comes before value to remind that the operation of
* this function is * offs = val .
*/
static void asd_write_byte(struct asd_ha_struct *asd_ha,
unsigned long offs, u8 val)
{
if (unlikely(asd_ha->iospace))
outb(val,
(unsigned long )asd_ha->io_handle[0 ].addr + (offs & 0 xFF));
else
writeb(val, asd_ha->io_handle[0 ].addr + offs);
wmb();
}
static void asd_write_word(struct asd_ha_struct *asd_ha,
unsigned long offs, u16 val)
{
if (unlikely(asd_ha->iospace))
outw(val,
(unsigned long )asd_ha->io_handle[0 ].addr + (offs & 0 xFF));
else
writew(val, asd_ha->io_handle[0 ].addr + offs);
wmb();
}
static void asd_write_dword(struct asd_ha_struct *asd_ha,
unsigned long offs, u32 val)
{
if (unlikely(asd_ha->iospace))
outl(val,
(unsigned long )asd_ha->io_handle[0 ].addr + (offs & 0 xFF));
else
writel(val, asd_ha->io_handle[0 ].addr + offs);
wmb();
}
/* Reading from device address space.
*/
static u8 asd_read_byte(struct asd_ha_struct *asd_ha, unsigned long offs)
{
u8 val;
if (unlikely(asd_ha->iospace))
val = inb((unsigned long ) asd_ha->io_handle[0 ].addr
+ (offs & 0 xFF));
else
val = readb(asd_ha->io_handle[0 ].addr + offs);
rmb();
return val;
}
static u16 asd_read_word(struct asd_ha_struct *asd_ha,
unsigned long offs)
{
u16 val;
if (unlikely(asd_ha->iospace))
val = inw((unsigned long )asd_ha->io_handle[0 ].addr
+ (offs & 0 xFF));
else
val = readw(asd_ha->io_handle[0 ].addr + offs);
rmb();
return val;
}
static u32 asd_read_dword(struct asd_ha_struct *asd_ha,
unsigned long offs)
{
u32 val;
if (unlikely(asd_ha->iospace))
val = inl((unsigned long ) asd_ha->io_handle[0 ].addr
+ (offs & 0 xFF));
else
val = readl(asd_ha->io_handle[0 ].addr + offs);
rmb();
return val;
}
static inline u32 asd_mem_offs_swa(void )
{
return 0 ;
}
static inline u32 asd_mem_offs_swc(void )
{
return asd_mem_offs_swa() + MBAR0_SWA_SIZE;
}
static inline u32 asd_mem_offs_swb(void )
{
return asd_mem_offs_swc() + MBAR0_SWC_SIZE + 0 x20;
}
/* We know that the register wanted is in the range
* of the sliding window .
*/
#define ASD_READ_SW(ww, type, ord) \
static type asd_read_## ww## _## ord(struct asd_ha_struct *asd_ha, \
u32 reg) \
{ \
struct asd_ha_addrspace *io_handle = &asd_ha->io_handle[0 ]; \
u32 map_offs = (reg - io_handle->ww## _base) + asd_mem_offs_## ww();\
return asd_read_## ord(asd_ha, (unsigned long )map_offs); \
}
#define ASD_WRITE_SW(ww, type, ord) \
static void asd_write_## ww## _## ord(struct asd_ha_struct *asd_ha, \
u32 reg, type val) \
{ \
struct asd_ha_addrspace *io_handle = &asd_ha->io_handle[0 ]; \
u32 map_offs = (reg - io_handle->ww## _base) + asd_mem_offs_## ww();\
asd_write_## ord(asd_ha, (unsigned long )map_offs, val); \
}
ASD_READ_SW(swa, u8, byte);
ASD_READ_SW(swa, u16, word);
ASD_READ_SW(swa, u32, dword);
ASD_READ_SW(swb, u8, byte);
ASD_READ_SW(swb, u16, word);
ASD_READ_SW(swb, u32, dword);
ASD_READ_SW(swc, u8, byte);
ASD_READ_SW(swc, u16, word);
ASD_READ_SW(swc, u32, dword);
ASD_WRITE_SW(swa, u8, byte);
ASD_WRITE_SW(swa, u16, word);
ASD_WRITE_SW(swa, u32, dword);
ASD_WRITE_SW(swb, u8, byte);
ASD_WRITE_SW(swb, u16, word);
ASD_WRITE_SW(swb, u32, dword);
ASD_WRITE_SW(swc, u8, byte);
ASD_WRITE_SW(swc, u16, word);
ASD_WRITE_SW(swc, u32, dword);
/*
* A word about sliding windows :
* MBAR0 is divided into sliding windows A , C and B , in that order .
* SWA starts at offset 0 of MBAR0 , up to 0 x57 , with size 0 x58 bytes .
* SWC starts at offset 0 x58 of MBAR0 , up to 0 x60 , with size 0 x8 bytes .
* From 0 x60 to 0 x7F , we have a copy of PCI config space 0 x60 - 0 x7F .
* SWB starts at offset 0 x80 of MBAR0 and extends to the end of MBAR0 .
* See asd_init_sw ( ) in aic94xx_hwi . c
*
* We map the most common registers we ' d access of the internal 4 GB
* host adapter memory space . If a register / internal memory location
* is wanted which is not mapped , we slide SWB , by paging it ,
* see asd_move_swb ( ) in aic94xx_reg . c .
*/
/**
* asd_move_swb - - move sliding window B
* @ asd_ha : pointer to host adapter structure
* @ reg : register desired to be within range of the new window
*/
static void asd_move_swb(struct asd_ha_struct *asd_ha, u32 reg)
{
u32 base = reg & ~(MBAR0_SWB_SIZE-1 );
pci_write_config_dword(asd_ha->pcidev, PCI_CONF_MBAR0_SWB, base);
asd_ha->io_handle[0 ].swb_base = base;
}
static void __asd_write_reg_byte(struct asd_ha_struct *asd_ha, u32 reg, u8 val)
{
struct asd_ha_addrspace *io_handle=&asd_ha->io_handle[0 ];
BUG_ON(reg >= 0 xC0000000 || reg < ALL_BASE_ADDR);
if (io_handle->swa_base <= reg
&& reg < io_handle->swa_base + MBAR0_SWA_SIZE)
asd_write_swa_byte (asd_ha, reg,val);
else if (io_handle->swb_base <= reg
&& reg < io_handle->swb_base + MBAR0_SWB_SIZE)
asd_write_swb_byte (asd_ha, reg, val);
else if (io_handle->swc_base <= reg
&& reg < io_handle->swc_base + MBAR0_SWC_SIZE)
asd_write_swc_byte (asd_ha, reg, val);
else {
/* Ok, we have to move SWB */
asd_move_swb(asd_ha, reg);
asd_write_swb_byte (asd_ha, reg, val);
}
}
#define ASD_WRITE_REG(type, ord) \
void asd_write_reg_## ord (struct asd_ha_struct *asd_ha, u32 reg, type val)\
{ \
struct asd_ha_addrspace *io_handle=&asd_ha->io_handle[0 ]; \
unsigned long flags; \
BUG_ON(reg >= 0 xC0000000 || reg < ALL_BASE_ADDR); \
spin_lock_irqsave(&asd_ha->iolock, flags); \
if (io_handle->swa_base <= reg \
&& reg < io_handle->swa_base + MBAR0_SWA_SIZE) \
asd_write_swa_## ord (asd_ha, reg,val); \
else if (io_handle->swb_base <= reg \
&& reg < io_handle->swb_base + MBAR0_SWB_SIZE) \
asd_write_swb_## ord (asd_ha, reg, val); \
else if (io_handle->swc_base <= reg \
&& reg < io_handle->swc_base + MBAR0_SWC_SIZE) \
asd_write_swc_## ord (asd_ha, reg, val); \
else { \
/* Ok, we have to move SWB */ \
asd_move_swb(asd_ha, reg); \
asd_write_swb_## ord (asd_ha, reg, val); \
} \
spin_unlock_irqrestore(&asd_ha->iolock, flags); \
}
ASD_WRITE_REG(u8, byte);
ASD_WRITE_REG(u16,word);
ASD_WRITE_REG(u32,dword);
static u8 __asd_read_reg_byte(struct asd_ha_struct *asd_ha, u32 reg)
{
struct asd_ha_addrspace *io_handle=&asd_ha->io_handle[0 ];
u8 val;
BUG_ON(reg >= 0 xC0000000 || reg < ALL_BASE_ADDR);
if (io_handle->swa_base <= reg
&& reg < io_handle->swa_base + MBAR0_SWA_SIZE)
val = asd_read_swa_byte (asd_ha, reg);
else if (io_handle->swb_base <= reg
&& reg < io_handle->swb_base + MBAR0_SWB_SIZE)
val = asd_read_swb_byte (asd_ha, reg);
else if (io_handle->swc_base <= reg
&& reg < io_handle->swc_base + MBAR0_SWC_SIZE)
val = asd_read_swc_byte (asd_ha, reg);
else {
/* Ok, we have to move SWB */
asd_move_swb(asd_ha, reg);
val = asd_read_swb_byte (asd_ha, reg);
}
return val;
}
#define ASD_READ_REG(type, ord) \
type asd_read_reg_## ord (struct asd_ha_struct *asd_ha, u32 reg) \
{ \
struct asd_ha_addrspace *io_handle=&asd_ha->io_handle[0 ]; \
type val; \
unsigned long flags; \
BUG_ON(reg >= 0 xC0000000 || reg < ALL_BASE_ADDR); \
spin_lock_irqsave(&asd_ha->iolock, flags); \
if (io_handle->swa_base <= reg \
&& reg < io_handle->swa_base + MBAR0_SWA_SIZE) \
val = asd_read_swa_## ord (asd_ha, reg); \
else if (io_handle->swb_base <= reg \
&& reg < io_handle->swb_base + MBAR0_SWB_SIZE) \
val = asd_read_swb_## ord (asd_ha, reg); \
else if (io_handle->swc_base <= reg \
&& reg < io_handle->swc_base + MBAR0_SWC_SIZE) \
val = asd_read_swc_## ord (asd_ha, reg); \
else { \
/* Ok, we have to move SWB */ \
asd_move_swb(asd_ha, reg); \
val = asd_read_swb_## ord (asd_ha, reg); \
} \
spin_unlock_irqrestore(&asd_ha->iolock, flags); \
return val; \
}
ASD_READ_REG(u8, byte);
ASD_READ_REG(u16,word);
ASD_READ_REG(u32,dword);
/**
* asd_read_reg_string - - read a string of bytes from io space memory
* @ asd_ha : pointer to host adapter structure
* @ dst : pointer to a destination buffer where data will be written to
* @ offs : start offset ( register ) to read from
* @ count : number of bytes to read
*/
void asd_read_reg_string(struct asd_ha_struct *asd_ha, void *dst,
u32 offs, int count)
{
u8 *p = dst;
unsigned long flags;
spin_lock_irqsave(&asd_ha->iolock, flags);
for ( ; count > 0 ; count--, offs++, p++)
*p = __asd_read_reg_byte(asd_ha, offs);
spin_unlock_irqrestore(&asd_ha->iolock, flags);
}
/**
* asd_write_reg_string - - write a string of bytes to io space memory
* @ asd_ha : pointer to host adapter structure
* @ src : pointer to source buffer where data will be read from
* @ offs : start offset ( register ) to write to
* @ count : number of bytes to write
*/
void asd_write_reg_string(struct asd_ha_struct *asd_ha, void *src,
u32 offs, int count)
{
u8 *p = src;
unsigned long flags;
spin_lock_irqsave(&asd_ha->iolock, flags);
for ( ; count > 0 ; count--, offs++, p++)
__asd_write_reg_byte(asd_ha, offs, *p);
spin_unlock_irqrestore(&asd_ha->iolock, flags);
}
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