cregit-Linux how code gets into the kernel

Release 4.7 include/linux/cb710.h

Directory: include/linux
/*
 *  cb710/cb710.h
 *
 *  Copyright by Michał Mirosław, 2008-2009
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#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[0];
};

/* 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); }

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static inline struct cb710_chip *cb710_slot_to_chip(struct cb710_slot *slot) { return dev_get_drvdata(slot->pdev.dev.parent); }

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static inline struct device *cb710_slot_dev(struct cb710_slot *slot) { return &slot->pdev.dev; }

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static inline struct device *cb710_chip_dev(struct cb710_chip *chip) { return &chip->pdev->dev; }

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/* 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 0x0F #define CB710_DUMP_REGS_MS 0x30 #define CB710_DUMP_REGS_SM 0xC0 #define CB710_DUMP_REGS_ALL 0xFF #define CB710_DUMP_REGS_MASK 0xFF #define CB710_DUMP_ACCESS_8 0x100 #define CB710_DUMP_ACCESS_16 0x200 #define CB710_DUMP_ACCESS_32 0x400 #define CB710_DUMP_ACCESS_ALL 0x700 #define CB710_DUMP_ACCESS_MASK 0x700 #endif /* LINUX_CB710_DRIVER_H */ /* * cb710/sgbuf2.h * * Copyright by Michał Mirosław, 2008-2009 * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #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)); }

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/** * 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); }

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#endif /* LINUX_CB710_SG_H */

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Directory: include/linux
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