/* SPDX-License-Identifier: GPL-2.0-only */
/*
* cb710 / cb710 . h
*
* Copyright by Micha ł Miros ł aw , 2008 - 2009
*/
#ifndef LINUX_CB710_DRIVER_H
#define LINUX_CB710_DRIVER_H
#include <linux/io.h>
#include <linux/interrupt.h>
#include <linux/spinlock.h>
#include <linux/pci.h>
#include <linux/platform_device.h>
#include <linux/mmc/host.h>
struct cb710_slot;
typedef int (*cb710_irq_handler_t)(struct cb710_slot *);
/* per-virtual-slot structure */
struct cb710_slot {
struct platform_device pdev;
void __iomem *iobase;
cb710_irq_handler_t irq_handler;
};
/* per-device structure */
struct cb710_chip {
struct pci_dev *pdev;
void __iomem *iobase;
unsigned platform_id;
#ifdef CONFIG_CB710_DEBUG_ASSUMPTIONS
atomic_t slot_refs_count;
#endif
unsigned slot_mask;
unsigned slots;
spinlock_t irq_lock;
struct cb710_slot slot[];
};
/* NOTE: cb710_chip.slots is modified only during device init/exit and
* they are all serialized wrt themselves */
/* cb710_chip.slot_mask values */
#define CB710_SLOT_MMC 1
#define CB710_SLOT_MS 2
#define CB710_SLOT_SM 4
/* slot port accessors - so the logic is more clear in the code */
#define CB710_PORT_ACCESSORS(t) \
static inline void cb710_write_port_## t(struct cb710_slot *slot, \
unsigned port, u## t value) \
{ \
iowrite## t(value, slot->iobase + port); \
} \
\
static inline u## t cb710_read_port_## t(struct cb710_slot *slot, \
unsigned port) \
{ \
return ioread## t(slot->iobase + port); \
} \
\
static inline void cb710_modify_port_## t(struct cb710_slot *slot, \
unsigned port, u## t set, u## t clear) \
{ \
iowrite## t( \
(ioread## t(slot->iobase + port) & ~clear)|set, \
slot->iobase + port); \
}
CB710_PORT_ACCESSORS(8 )
CB710_PORT_ACCESSORS(16 )
CB710_PORT_ACCESSORS(32 )
void cb710_pci_update_config_reg(struct pci_dev *pdev,
int reg, uint32_t and , uint32_t xor );
void cb710_set_irq_handler(struct cb710_slot *slot,
cb710_irq_handler_t handler);
/* some device struct walking */
static inline struct cb710_slot *cb710_pdev_to_slot(
struct platform_device *pdev)
{
return container_of(pdev, struct cb710_slot, pdev);
}
static inline struct cb710_chip *cb710_slot_to_chip(struct cb710_slot *slot)
{
return dev_get_drvdata(slot->pdev.dev.parent);
}
static inline struct device *cb710_slot_dev(struct cb710_slot *slot)
{
return &slot->pdev.dev;
}
static inline struct device *cb710_chip_dev(struct cb710_chip *chip)
{
return &chip->pdev->dev;
}
/* debugging aids */
#ifdef CONFIG_CB710_DEBUG
void cb710_dump_regs(struct cb710_chip *chip, unsigned dump);
#else
#define cb710_dump_regs(c, d) do {} while (0 )
#endif
#define CB710_DUMP_REGS_MMC 0 x0F
#define CB710_DUMP_REGS_MS 0 x30
#define CB710_DUMP_REGS_SM 0 xC0
#define CB710_DUMP_REGS_ALL 0 xFF
#define CB710_DUMP_REGS_MASK 0 xFF
#define CB710_DUMP_ACCESS_8 0 x100
#define CB710_DUMP_ACCESS_16 0 x200
#define CB710_DUMP_ACCESS_32 0 x400
#define CB710_DUMP_ACCESS_ALL 0 x700
#define CB710_DUMP_ACCESS_MASK 0 x700
#endif /* LINUX_CB710_DRIVER_H */
/*
* cb710 / sgbuf2 . h
*
* Copyright by Micha ł Miros ł aw , 2008 - 2009
*/
#ifndef LINUX_CB710_SG_H
#define LINUX_CB710_SG_H
#include <linux/highmem.h>
#include <linux/scatterlist.h>
/*
* 32 - bit PIO mapping sg iterator
*
* Hides scatterlist access issues - fragment boundaries , alignment , page
* mapping - for drivers using 32 - bit - word - at - a - time - PIO ( ie . PCI devices
* without DMA support ) .
*
* Best - case reading ( transfer from device ) :
* sg_miter_start ( , SG_MITER_TO_SG ) ;
* cb710_sg_dwiter_write_from_io ( ) ;
* sg_miter_stop ( ) ;
*
* Best - case writing ( transfer to device ) :
* sg_miter_start ( , SG_MITER_FROM_SG ) ;
* cb710_sg_dwiter_read_to_io ( ) ;
* sg_miter_stop ( ) ;
*/
uint32_t cb710_sg_dwiter_read_next_block(struct sg_mapping_iter *miter);
void cb710_sg_dwiter_write_next_block(struct sg_mapping_iter *miter, uint32_t data);
/**
* cb710_sg_dwiter_write_from_io - transfer data to mapped buffer from 32 - bit IO port
* @ miter : sg mapping iter
* @ port : PIO port - IO or MMIO address
* @ count : number of 32 - bit words to transfer
*
* Description :
* Reads @ count 32 - bit words from register @ port and stores it in
* buffer iterated by @ miter . Data that would overflow the buffer
* is silently ignored . Iterator is advanced by 4 * @ count bytes
* or to the buffer ' s end whichever is closer .
*
* Context :
* IRQ disabled if the SG_MITER_ATOMIC is set . Don ' t care otherwise .
*/
static inline void cb710_sg_dwiter_write_from_io(struct sg_mapping_iter *miter,
void __iomem *port, size_t count)
{
while (count-- > 0 )
cb710_sg_dwiter_write_next_block(miter, ioread32(port));
}
/**
* cb710_sg_dwiter_read_to_io - transfer data to 32 - bit IO port from mapped buffer
* @ miter : sg mapping iter
* @ port : PIO port - IO or MMIO address
* @ count : number of 32 - bit words to transfer
*
* Description :
* Writes @ count 32 - bit words to register @ port from buffer iterated
* through @ miter . If buffer ends before @ count words are written
* missing data is replaced by zeroes . @ miter is advanced by 4 * @ count
* bytes or to the buffer ' s end whichever is closer .
*
* Context :
* IRQ disabled if the SG_MITER_ATOMIC is set . Don ' t care otherwise .
*/
static inline void cb710_sg_dwiter_read_to_io(struct sg_mapping_iter *miter,
void __iomem *port, size_t count)
{
while (count-- > 0 )
iowrite32(cb710_sg_dwiter_read_next_block(miter), port);
}
#endif /* LINUX_CB710_SG_H */
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