cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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dev-pcmcia.c (3041B)

      1/*
      2 * This file is subject to the terms and conditions of the GNU General Public
      3 * License.  See the file "COPYING" in the main directory of this archive
      4 * for more details.
      5 *
      6 * Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr>
      7 */
      8
      9#include <linux/init.h>
     10#include <linux/kernel.h>
     11#include <asm/bootinfo.h>
     12#include <linux/platform_device.h>
     13#include <bcm63xx_cs.h>
     14#include <bcm63xx_cpu.h>
     15#include <bcm63xx_dev_pcmcia.h>
     16#include <bcm63xx_io.h>
     17#include <bcm63xx_regs.h>
     18
     19static struct resource pcmcia_resources[] = {
     20	/* pcmcia registers */
     21	{
     22		/* start & end filled at runtime */
     23		.flags		= IORESOURCE_MEM,
     24	},
     25
     26	/* pcmcia memory zone resources */
     27	{
     28		.start		= BCM_PCMCIA_COMMON_BASE_PA,
     29		.end		= BCM_PCMCIA_COMMON_END_PA,
     30		.flags		= IORESOURCE_MEM,
     31	},
     32	{
     33		.start		= BCM_PCMCIA_ATTR_BASE_PA,
     34		.end		= BCM_PCMCIA_ATTR_END_PA,
     35		.flags		= IORESOURCE_MEM,
     36	},
     37	{
     38		.start		= BCM_PCMCIA_IO_BASE_PA,
     39		.end		= BCM_PCMCIA_IO_END_PA,
     40		.flags		= IORESOURCE_MEM,
     41	},
     42
     43	/* PCMCIA irq */
     44	{
     45		/* start filled at runtime */
     46		.flags		= IORESOURCE_IRQ,
     47	},
     48
     49	/* declare PCMCIA IO resource also */
     50	{
     51		.start		= BCM_PCMCIA_IO_BASE_PA,
     52		.end		= BCM_PCMCIA_IO_END_PA,
     53		.flags		= IORESOURCE_IO,
     54	},
     55};
     56
     57static struct bcm63xx_pcmcia_platform_data pd;
     58
     59static struct platform_device bcm63xx_pcmcia_device = {
     60	.name		= "bcm63xx_pcmcia",
     61	.id		= 0,
     62	.num_resources	= ARRAY_SIZE(pcmcia_resources),
     63	.resource	= pcmcia_resources,
     64	.dev		= {
     65		.platform_data = &pd,
     66	},
     67};
     68
     69static int __init config_pcmcia_cs(unsigned int cs,
     70				   u32 base, unsigned int size)
     71{
     72	int ret;
     73
     74	ret = bcm63xx_set_cs_status(cs, 0);
     75	if (!ret)
     76		ret = bcm63xx_set_cs_base(cs, base, size);
     77	if (!ret)
     78		ret = bcm63xx_set_cs_status(cs, 1);
     79	return ret;
     80}
     81
     82static const struct {
     83	unsigned int	cs;
     84	unsigned int	base;
     85	unsigned int	size;
     86} pcmcia_cs[3] __initconst = {
     87	{
     88		.cs	= MPI_CS_PCMCIA_COMMON,
     89		.base	= BCM_PCMCIA_COMMON_BASE_PA,
     90		.size	= BCM_PCMCIA_COMMON_SIZE
     91	},
     92	{
     93		.cs	= MPI_CS_PCMCIA_ATTR,
     94		.base	= BCM_PCMCIA_ATTR_BASE_PA,
     95		.size	= BCM_PCMCIA_ATTR_SIZE
     96	},
     97	{
     98		.cs	= MPI_CS_PCMCIA_IO,
     99		.base	= BCM_PCMCIA_IO_BASE_PA,
    100		.size	= BCM_PCMCIA_IO_SIZE
    101	},
    102};
    103
    104int __init bcm63xx_pcmcia_register(void)
    105{
    106	int ret, i;
    107
    108	if (!BCMCPU_IS_6348() && !BCMCPU_IS_6358())
    109		return 0;
    110
    111	/* use correct pcmcia ready gpio depending on processor */
    112	switch (bcm63xx_get_cpu_id()) {
    113	case BCM6348_CPU_ID:
    114		pd.ready_gpio = 22;
    115		break;
    116
    117	case BCM6358_CPU_ID:
    118		pd.ready_gpio = 18;
    119		break;
    120
    121	default:
    122		return -ENODEV;
    123	}
    124
    125	pcmcia_resources[0].start = bcm63xx_regset_address(RSET_PCMCIA);
    126	pcmcia_resources[0].end = pcmcia_resources[0].start +
    127		RSET_PCMCIA_SIZE - 1;
    128	pcmcia_resources[4].start = bcm63xx_get_irq_number(IRQ_PCMCIA);
    129
    130	/* configure pcmcia chip selects */
    131	for (i = 0; i < 3; i++) {
    132		ret = config_pcmcia_cs(pcmcia_cs[i].cs,
    133				       pcmcia_cs[i].base,
    134				       pcmcia_cs[i].size);
    135		if (ret)
    136			goto out_err;
    137	}
    138
    139	return platform_device_register(&bcm63xx_pcmcia_device);
    140
    141out_err:
    142	pr_err("unable to set pcmcia chip select\n");
    143	return ret;
    144}