LXR linux/drivers/usb/host/sl811

   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * PCMCIA driver for SL811HS (as found in REX-CFU1U)
   4 * Filename: sl811_cs.c
   5 * Author:   Yukio Yamamoto
   6 *
   7 *  Port to sl811-hcd and 2.6.x by
   8 *    Botond Botyanszki <boti@rocketmail.com>
   9 *    Simon Pickering
  10 *
  11 *  Last update: 2005-05-12
  12 */
  13
  14#include <linux/kernel.h>
  15#include <linux/module.h>
  16#include <linux/ptrace.h>
  17#include <linux/slab.h>
  18#include <linux/string.h>
  19#include <linux/timer.h>
  20#include <linux/ioport.h>
  21#include <linux/platform_device.h>
  22
  23#include <pcmcia/cistpl.h>
  24#include <pcmcia/cisreg.h>
  25#include <pcmcia/ds.h>
  26
  27#include <linux/usb/sl811.h>
  28
  29MODULE_AUTHOR("Botond Botyanszki");
  30MODULE_DESCRIPTION("REX-CFU1U PCMCIA driver for 2.6");
  31MODULE_LICENSE("GPL");
  32
  33
  34/*====================================================================*/
  35/* MACROS                                                             */
  36/*====================================================================*/
  37
  38#define INFO(args...) printk(KERN_INFO "sl811_cs: " args)
  39
  40/*====================================================================*/
  41/* VARIABLES                                                          */
  42/*====================================================================*/
  43
  44typedef struct local_info_t {
  45        struct pcmcia_device    *p_dev;
  46} local_info_t;
  47
  48static void sl811_cs_release(struct pcmcia_device * link);
  49
  50/*====================================================================*/
  51
  52static void release_platform_dev(struct device * dev)
  53{
  54        dev_dbg(dev, "sl811_cs platform_dev release\n");
  55        dev->parent = NULL;
  56}
  57
  58static struct sl811_platform_data platform_data = {
  59        .potpg          = 100,
  60        .power          = 50,           /* == 100mA */
  61        // .reset       = ... FIXME:  invoke CF reset on the card
  62};
  63
  64static struct resource resources[] = {
  65        [0] = {
  66                .flags  = IORESOURCE_IRQ,
  67        },
  68        [1] = {
  69                // .name   = "address",
  70                .flags  = IORESOURCE_IO,
  71        },
  72        [2] = {
  73                // .name   = "data",
  74                .flags  = IORESOURCE_IO,
  75        },
  76};
  77
  78extern struct platform_driver sl811h_driver;
  79
  80static struct platform_device platform_dev = {
  81        .id                     = -1,
  82        .dev = {
  83                .platform_data = &platform_data,
  84                .release       = release_platform_dev,
  85        },
  86        .resource               = resources,
  87        .num_resources          = ARRAY_SIZE(resources),
  88};
  89
  90static int sl811_hc_init(struct device *parent, resource_size_t base_addr,
  91                         int irq)
  92{
  93        if (platform_dev.dev.parent)
  94                return -EBUSY;
  95        platform_dev.dev.parent = parent;
  96
  97        /* finish setting up the platform device */
  98        resources[0].start = irq;
  99
 100        resources[1].start = base_addr;
 101        resources[1].end = base_addr;
 102
 103        resources[2].start = base_addr + 1;
 104        resources[2].end   = base_addr + 1;
 105
 106        /* The driver core will probe for us.  We know sl811-hcd has been
 107         * initialized already because of the link order dependency created
 108         * by referencing "sl811h_driver".
 109         */
 110        platform_dev.name = sl811h_driver.driver.name;
 111        return platform_device_register(&platform_dev);
 112}
 113
 114/*====================================================================*/
 115
 116static void sl811_cs_detach(struct pcmcia_device *link)
 117{
 118        dev_dbg(&link->dev, "sl811_cs_detach\n");
 119
 120        sl811_cs_release(link);
 121
 122        /* This points to the parent local_info_t struct */
 123        kfree(link->priv);
 124}
 125
 126static void sl811_cs_release(struct pcmcia_device * link)
 127{
 128        dev_dbg(&link->dev, "sl811_cs_release\n");
 129
 130        pcmcia_disable_device(link);
 131        platform_device_unregister(&platform_dev);
 132}
 133
 134static int sl811_cs_config_check(struct pcmcia_device *p_dev, void *priv_data)
 135{
 136        if (p_dev->config_index == 0)
 137                return -EINVAL;
 138
 139        return pcmcia_request_io(p_dev);
 140}
 141
 142
 143static int sl811_cs_config(struct pcmcia_device *link)
 144{
 145        struct device           *parent = &link->dev;
 146        int                     ret;
 147
 148        dev_dbg(&link->dev, "sl811_cs_config\n");
 149
 150        link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_VPP |
 151                CONF_AUTO_CHECK_VCC | CONF_AUTO_SET_IO;
 152
 153        if (pcmcia_loop_config(link, sl811_cs_config_check, NULL))
 154                goto failed;
 155
 156        /* require an IRQ and two registers */
 157        if (resource_size(link->resource[0]) < 2)
 158                goto failed;
 159
 160        if (!link->irq)
 161                goto failed;
 162
 163        ret = pcmcia_enable_device(link);
 164        if (ret)
 165                goto failed;
 166
 167        if (sl811_hc_init(parent, link->resource[0]->start, link->irq)
 168                        < 0) {
 169failed:
 170                printk(KERN_WARNING "sl811_cs_config failed\n");
 171                sl811_cs_release(link);
 172                return  -ENODEV;
 173        }
 174        return 0;
 175}
 176
 177static int sl811_cs_probe(struct pcmcia_device *link)
 178{
 179        local_info_t *local;
 180
 181        local = kzalloc(sizeof(local_info_t), GFP_KERNEL);
 182        if (!local)
 183                return -ENOMEM;
 184        local->p_dev = link;
 185        link->priv = local;
 186
 187        return sl811_cs_config(link);
 188}
 189
 190static const struct pcmcia_device_id sl811_ids[] = {
 191        PCMCIA_DEVICE_MANF_CARD(0xc015, 0x0001), /* RATOC USB HOST CF+ Card */
 192        PCMCIA_DEVICE_NULL,
 193};
 194MODULE_DEVICE_TABLE(pcmcia, sl811_ids);
 195
 196static struct pcmcia_driver sl811_cs_driver = {
 197        .owner          = THIS_MODULE,
 198        .name           = "sl811_cs",
 199        .probe          = sl811_cs_probe,
 200        .remove         = sl811_cs_detach,
 201        .id_table       = sl811_ids,
 202};
 203module_pcmcia_driver(sl811_cs_driver);
 204