[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / rapidio / rio-sysfs.c

/*
 * RapidIO sysfs attributes and support
 *
 * Copyright 2005 MontaVista Software, Inc.
 * Matt Porter <mporter@kernel.crashing.org>
 *
 * This program is free software; you can redistribute  it and/or modify it
 * under  the terms of  the GNU General  Public License as published by the
 * Free Software Foundation;  either version 2 of the  License, or (at your
 * option) any later version.
 */

#include <linux/kernel.h>
#include <linux/rio.h>
#include <linux/rio_drv.h>
#include <linux/stat.h>

#include "rio.h"

/* Sysfs support */
#define rio_config_attr(field, format_string)					\
static ssize_t								\
field##_show(struct device *dev, struct device_attribute *attr, char *buf)			\
{									\
	struct rio_dev *rdev = to_rio_dev(dev);				\
									\
	return sprintf(buf, format_string, rdev->field);		\
}									\

rio_config_attr(did, "0x%04x\n");
rio_config_attr(vid, "0x%04x\n");
rio_config_attr(device_rev, "0x%08x\n");
rio_config_attr(asm_did, "0x%04x\n");
rio_config_attr(asm_vid, "0x%04x\n");
rio_config_attr(asm_rev, "0x%04x\n");

static ssize_t routes_show(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct rio_dev *rdev = to_rio_dev(dev);
	char *str = buf;
	int i;

	if (!rdev->rswitch)
		goto out;

	for (i = 0; i < RIO_MAX_ROUTE_ENTRIES(rdev->net->hport->sys_size);
			i++) {
		if (rdev->rswitch->route_table[i] == RIO_INVALID_ROUTE)
			continue;
		str +=
		    sprintf(str, "%04x %02x\n", i,
			    rdev->rswitch->route_table[i]);
	}

      out:
	return (str - buf);
}

struct device_attribute rio_dev_attrs[] = {
	__ATTR_RO(did),
	__ATTR_RO(vid),
	__ATTR_RO(device_rev),
	__ATTR_RO(asm_did),
	__ATTR_RO(asm_vid),
	__ATTR_RO(asm_rev),
	__ATTR_RO(routes),
	__ATTR_NULL,
};

static ssize_t
rio_read_config(struct kobject *kobj, struct bin_attribute *bin_attr,
		char *buf, loff_t off, size_t count)
{
	struct rio_dev *dev =
	    to_rio_dev(container_of(kobj, struct device, kobj));
	unsigned int size = 0x100;
	loff_t init_off = off;
	u8 *data = (u8 *) buf;

	/* Several chips lock up trying to read undefined config space */
	if (capable(CAP_SYS_ADMIN))
		size = 0x200000;

	if (off > size)
		return 0;
	if (off + count > size) {
		size -= off;
		count = size;
	} else {
		size = count;
	}

	if ((off & 1) && size) {
		u8 val;
		rio_read_config_8(dev, off, &val);
		data[off - init_off] = val;
		off++;
		size--;
	}

	if ((off & 3) && size > 2) {
		u16 val;
		rio_read_config_16(dev, off, &val);
		data[off - init_off] = (val >> 8) & 0xff;
		data[off - init_off + 1] = val & 0xff;
		off += 2;
		size -= 2;
	}

	while (size > 3) {
		u32 val;
		rio_read_config_32(dev, off, &val);
		data[off - init_off] = (val >> 24) & 0xff;
		data[off - init_off + 1] = (val >> 16) & 0xff;
		data[off - init_off + 2] = (val >> 8) & 0xff;
		data[off - init_off + 3] = val & 0xff;
		off += 4;
		size -= 4;
	}

	if (size >= 2) {
		u16 val;
		rio_read_config_16(dev, off, &val);
		data[off - init_off] = (val >> 8) & 0xff;
		data[off - init_off + 1] = val & 0xff;
		off += 2;
		size -= 2;
	}

	if (size > 0) {
		u8 val;
		rio_read_config_8(dev, off, &val);
		data[off - init_off] = val;
		off++;
		--size;
	}

	return count;
}

static ssize_t
rio_write_config(struct kobject *kobj, struct bin_attribute *bin_attr,
		 char *buf, loff_t off, size_t count)
{
	struct rio_dev *dev =
	    to_rio_dev(container_of(kobj, struct device, kobj));
	unsigned int size = count;
	loff_t init_off = off;
	u8 *data = (u8 *) buf;

	if (off > 0x200000)
		return 0;
	if (off + count > 0x200000) {
		size = 0x200000 - off;
		count = size;
	}

	if ((off & 1) && size) {
		rio_write_config_8(dev, off, data[off - init_off]);
		off++;
		size--;
	}

	if ((off & 3) && (size > 2)) {
		u16 val = data[off - init_off + 1];
		val |= (u16) data[off - init_off] << 8;
		rio_write_config_16(dev, off, val);
		off += 2;
		size -= 2;
	}

	while (size > 3) {
		u32 val = data[off - init_off + 3];
		val |= (u32) data[off - init_off + 2] << 8;
		val |= (u32) data[off - init_off + 1] << 16;
		val |= (u32) data[off - init_off] << 24;
		rio_write_config_32(dev, off, val);
		off += 4;
		size -= 4;
	}

	if (size >= 2) {
		u16 val = data[off - init_off + 1];
		val |= (u16) data[off - init_off] << 8;
		rio_write_config_16(dev, off, val);
		off += 2;
		size -= 2;
	}

	if (size) {
		rio_write_config_8(dev, off, data[off - init_off]);
		off++;
		--size;
	}

	return count;
}

static struct bin_attribute rio_config_attr = {
	.attr = {
		 .name = "config",
		 .mode = S_IRUGO | S_IWUSR,
		 },
	.size = 0x200000,
	.read = rio_read_config,
	.write = rio_write_config,
};

/**
 * rio_create_sysfs_dev_files - create RIO specific sysfs files
 * @rdev: device whose entries should be created
 *
 * Create files when @rdev is added to sysfs.
 */
int rio_create_sysfs_dev_files(struct rio_dev *rdev)
{
	int err = 0;

	err = sysfs_create_bin_file(&rdev->dev.kobj, &rio_config_attr);

	return err;
}

/**
 * rio_remove_sysfs_dev_files - cleanup RIO specific sysfs files
 * @rdev: device whose entries we should free
 *
 * Cleanup when @rdev is removed from sysfs.
 */
void rio_remove_sysfs_dev_files(struct rio_dev *rdev)
{
	sysfs_remove_bin_file(&rdev->dev.kobj, &rio_config_attr);
}
Commit	Line	Data
394b701c MP	1	/*
	2	* RapidIO sysfs attributes and support
	3	*
	4	* Copyright 2005 MontaVista Software, Inc.
	5	* Matt Porter <mporter@kernel.crashing.org>
	6	*
	7	* This program is free software; you can redistribute it and/or modify it
	8	* under the terms of the GNU General Public License as published by the
	9	* Free Software Foundation; either version 2 of the License, or (at your
	10	* option) any later version.
	11	*/
	12
394b701c MP	13	#include <linux/kernel.h>
	14	#include <linux/rio.h>
	15	#include <linux/rio_drv.h>
	16	#include <linux/stat.h>
	17
	18	#include "rio.h"
	19
	20	/* Sysfs support */
	21	#define rio_config_attr(field, format_string) \
	22	static ssize_t \
6978bbc0	23	field##_show(struct device dev, struct device_attribute attr, char *buf) \
394b701c MP	24	{ \
	25	struct rio_dev *rdev = to_rio_dev(dev); \
	26	\
	27	return sprintf(buf, format_string, rdev->field); \
	28	} \
	29
	30	rio_config_attr(did, "0x%04x\n");
	31	rio_config_attr(vid, "0x%04x\n");
	32	rio_config_attr(device_rev, "0x%08x\n");
	33	rio_config_attr(asm_did, "0x%04x\n");
	34	rio_config_attr(asm_vid, "0x%04x\n");
	35	rio_config_attr(asm_rev, "0x%04x\n");
	36
6978bbc0	37	static ssize_t routes_show(struct device dev, struct device_attribute attr, char *buf)
394b701c MP	38	{
	39	struct rio_dev *rdev = to_rio_dev(dev);
	40	char *str = buf;
	41	int i;
	42
	43	if (!rdev->rswitch)
	44	goto out;
	45
e0423236 ZW	46	for (i = 0; i < RIO_MAX_ROUTE_ENTRIES(rdev->net->hport->sys_size);
e0423236 ZW	47	i++) {
394b701c MP	48	if (rdev->rswitch->route_table[i] == RIO_INVALID_ROUTE)
	49	continue;
	50	str +=
	51	sprintf(str, "%04x %02x\n", i,
	52	rdev->rswitch->route_table[i]);
	53	}
	54
	55	out:
	56	return (str - buf);
	57	}
	58
	59	struct device_attribute rio_dev_attrs[] = {
	60	__ATTR_RO(did),
	61	__ATTR_RO(vid),
	62	__ATTR_RO(device_rev),
	63	__ATTR_RO(asm_did),
	64	__ATTR_RO(asm_vid),
	65	__ATTR_RO(asm_rev),
	66	__ATTR_RO(routes),
	67	__ATTR_NULL,
	68	};
	69
	70	static ssize_t
91a69029 ZR	71	rio_read_config(struct kobject kobj, struct bin_attribute bin_attr,
91a69029 ZR	72	char *buf, loff_t off, size_t count)
394b701c MP	73	{
	74	struct rio_dev *dev =
	75	to_rio_dev(container_of(kobj, struct device, kobj));
	76	unsigned int size = 0x100;
	77	loff_t init_off = off;
	78	u8 data = (u8 ) buf;
	79
	80	/* Several chips lock up trying to read undefined config space */
	81	if (capable(CAP_SYS_ADMIN))
	82	size = 0x200000;
	83
	84	if (off > size)
	85	return 0;
	86	if (off + count > size) {
	87	size -= off;
	88	count = size;
	89	} else {
	90	size = count;
	91	}
	92
	93	if ((off & 1) && size) {
	94	u8 val;
	95	rio_read_config_8(dev, off, &val);
	96	data[off - init_off] = val;
	97	off++;
	98	size--;
	99	}
	100
	101	if ((off & 3) && size > 2) {
	102	u16 val;
	103	rio_read_config_16(dev, off, &val);
	104	data[off - init_off] = (val >> 8) & 0xff;
	105	data[off - init_off + 1] = val & 0xff;
	106	off += 2;
	107	size -= 2;
	108	}
	109
	110	while (size > 3) {
	111	u32 val;
	112	rio_read_config_32(dev, off, &val);
	113	data[off - init_off] = (val >> 24) & 0xff;
	114	data[off - init_off + 1] = (val >> 16) & 0xff;
	115	data[off - init_off + 2] = (val >> 8) & 0xff;
	116	data[off - init_off + 3] = val & 0xff;
	117	off += 4;
	118	size -= 4;
	119	}
	120
	121	if (size >= 2) {
	122	u16 val;
	123	rio_read_config_16(dev, off, &val);
	124	data[off - init_off] = (val >> 8) & 0xff;
	125	data[off - init_off + 1] = val & 0xff;
	126	off += 2;
	127	size -= 2;
	128	}
	129
	130	if (size > 0) {
	131	u8 val;
	132	rio_read_config_8(dev, off, &val);
	133	data[off - init_off] = val;
	134	off++;
	135	--size;
	136	}
137
138	return count;
139	}
140
141	static ssize_t
91a69029 ZR	142	rio_write_config(struct kobject kobj, struct bin_attribute bin_attr,
91a69029 ZR	143	char *buf, loff_t off, size_t count)
394b701c MP	144	{
	145	struct rio_dev *dev =
	146	to_rio_dev(container_of(kobj, struct device, kobj));
	147	unsigned int size = count;
	148	loff_t init_off = off;
	149	u8 data = (u8 ) buf;
	150
	151	if (off > 0x200000)
	152	return 0;
	153	if (off + count > 0x200000) {
	154	size = 0x200000 - off;
	155	count = size;
	156	}
	157
	158	if ((off & 1) && size) {
	159	rio_write_config_8(dev, off, data[off - init_off]);
	160	off++;
	161	size--;
	162	}
	163
	164	if ((off & 3) && (size > 2)) {
	165	u16 val = data[off - init_off + 1];
	166	val \|= (u16) data[off - init_off] << 8;
	167	rio_write_config_16(dev, off, val);
	168	off += 2;
	169	size -= 2;
	170	}
	171
	172	while (size > 3) {
	173	u32 val = data[off - init_off + 3];
	174	val \|= (u32) data[off - init_off + 2] << 8;
	175	val \|= (u32) data[off - init_off + 1] << 16;
	176	val \|= (u32) data[off - init_off] << 24;
	177	rio_write_config_32(dev, off, val);
	178	off += 4;
	179	size -= 4;
	180	}
	181
	182	if (size >= 2) {
	183	u16 val = data[off - init_off + 1];
	184	val \|= (u16) data[off - init_off] << 8;
	185	rio_write_config_16(dev, off, val);
	186	off += 2;
	187	size -= 2;
	188	}
	189
	190	if (size) {
	191	rio_write_config_8(dev, off, data[off - init_off]);
	192	off++;
	193	--size;
	194	}
	195
	196	return count;
	197	}
	198
	199	static struct bin_attribute rio_config_attr = {
	200	.attr = {
	201	.name = "config",
	202	.mode = S_IRUGO \| S_IWUSR,
394b701c MP	203	},
	204	.size = 0x200000,
	205	.read = rio_read_config,
	206	.write = rio_write_config,
	207	};
	208
	209	/**
	210	* rio_create_sysfs_dev_files - create RIO specific sysfs files
	211	* @rdev: device whose entries should be created
	212	*
	213	* Create files when @rdev is added to sysfs.
	214	*/
	215	int rio_create_sysfs_dev_files(struct rio_dev *rdev)
	216	{
5f28c520	217	int err = 0;
394b701c	218
5f28c520 YL	219	err = sysfs_create_bin_file(&rdev->dev.kobj, &rio_config_attr);
	220
	221	return err;
394b701c MP	222	}
	223
	224	/**
	225	* rio_remove_sysfs_dev_files - cleanup RIO specific sysfs files
	226	* @rdev: device whose entries we should free
	227	*
	228	* Cleanup when @rdev is removed from sysfs.
	229	*/
	230	void rio_remove_sysfs_dev_files(struct rio_dev *rdev)
	231	{
	232	sysfs_remove_bin_file(&rdev->dev.kobj, &rio_config_attr);
	233	}