drivers/usb/host/sl811_cs.c

   1 /*
   2  * PCMCIA driver for SL811HS (as found in REX-CFU1U)
   3  * Filename: sl811_cs.c
   4  * Author:   Yukio Yamamoto
   5  *
   6  *  Port to sl811-hcd and 2.6.x by
   7  *    Botond Botyanszki <boti@rocketmail.com>
   8  *    Simon Pickering
   9  *
  10  *  Last update: 2005-05-12
  11  */
  12
  13 #include <linux/kernel.h>
  14 #include <linux/module.h>
  15 #include <linux/init.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/cs_types.h>
  24 #include <pcmcia/cs.h>
  25 #include <pcmcia/cistpl.h>
  26 #include <pcmcia/cisreg.h>
  27 #include <pcmcia/ds.h>
  28
  29 #include <linux/usb/sl811.h>
  30
  31 MODULE_AUTHOR("Botond Botyanszki");
  32 MODULE_DESCRIPTION("REX-CFU1U PCMCIA driver for 2.6");
  33 MODULE_LICENSE("GPL");
  34
  35
  36 /*====================================================================*/
  37 /* MACROS                                                             */
  38 /*====================================================================*/
  39
  40 #define INFO(args...) printk(KERN_INFO "sl811_cs: " args)
  41
  42 /*====================================================================*/
  43 /* VARIABLES                                                          */
  44 /*====================================================================*/
  45
  46 static const char driver_name[DEV_NAME_LEN]  = "sl811_cs";
  47
  48 typedef struct local_info_t {
  49         struct pcmcia_device    *p_dev;
  50         dev_node_t              node;
  51 } local_info_t;
  52
  53 static void sl811_cs_release(struct pcmcia_device * link);
  54
  55 /*====================================================================*/
  56
  57 static void release_platform_dev(struct device * dev)
  58 {
  59         dev_dbg(dev, "sl811_cs platform_dev release\n");
  60         dev->parent = NULL;
  61 }
  62
  63 static struct sl811_platform_data platform_data = {
  64         .potpg          = 100,
  65         .power          = 50,           /* == 100mA */
  66         // .reset       = ... FIXME:  invoke CF reset on the card
  67 };
  68
  69 static struct resource resources[] = {
  70         [0] = {
  71                 .flags  = IORESOURCE_IRQ,
  72         },
  73         [1] = {
  74                 // .name   = "address",
  75                 .flags  = IORESOURCE_IO,
  76         },
  77         [2] = {
  78                 // .name   = "data",
  79                 .flags  = IORESOURCE_IO,
  80         },
  81 };
  82
  83 extern struct platform_driver sl811h_driver;
  84
  85 static struct platform_device platform_dev = {
  86         .id                     = -1,
  87         .dev = {
  88                 .platform_data = &platform_data,
  89                 .release       = release_platform_dev,
  90         },
  91         .resource               = resources,
  92         .num_resources          = ARRAY_SIZE(resources),
  93 };
  94
  95 static int sl811_hc_init(struct device *parent, resource_size_t base_addr,
  96                          int irq)
  97 {
  98         if (platform_dev.dev.parent)
  99                 return -EBUSY;
 100         platform_dev.dev.parent = parent;
 101
 102         /* finish seting up the platform device */
 103         resources[0].start = irq;
 104
 105         resources[1].start = base_addr;
 106         resources[1].end = base_addr;
 107
 108         resources[2].start = base_addr + 1;
 109         resources[2].end   = base_addr + 1;
 110
 111         /* The driver core will probe for us.  We know sl811-hcd has been
 112          * initialized already because of the link order dependency created
 113          * by referencing "sl811h_driver".
 114          */
 115         platform_dev.name = sl811h_driver.driver.name;
 116         return platform_device_register(&platform_dev);
 117 }
 118
 119 /*====================================================================*/
 120
 121 static void sl811_cs_detach(struct pcmcia_device *link)
 122 {
 123         dev_dbg(&link->dev, "sl811_cs_detach\n");
 124
 125         sl811_cs_release(link);
 126
 127         /* This points to the parent local_info_t struct */
 128         kfree(link->priv);
 129 }
 130
 131 static void sl811_cs_release(struct pcmcia_device * link)
 132 {
 133         dev_dbg(&link->dev, "sl811_cs_release\n");
 134
 135         pcmcia_disable_device(link);
 136         platform_device_unregister(&platform_dev);
 137 }
 138
 139 static int sl811_cs_config_check(struct pcmcia_device *p_dev,
 140                                  cistpl_cftable_entry_t *cfg,
 141                                  cistpl_cftable_entry_t *dflt,
 142                                  unsigned int vcc,
 143                                  void *priv_data)
 144 {
 145         if (cfg->index == 0)
 146                 return -ENODEV;
 147
 148         /* Use power settings for Vcc and Vpp if present */
 149         /*  Note that the CIS values need to be rescaled */
 150         if (cfg->vcc.present & (1<<CISTPL_POWER_VNOM)) {
 151                 if (cfg->vcc.param[CISTPL_POWER_VNOM]/10000 != vcc)
 152                         return -ENODEV;
 153         } else if (dflt->vcc.present & (1<<CISTPL_POWER_VNOM)) {
 154                 if (dflt->vcc.param[CISTPL_POWER_VNOM]/10000 != vcc)
 155                         return -ENODEV;
 156                 }
 157
 158         if (cfg->vpp1.present & (1<<CISTPL_POWER_VNOM))
 159                 p_dev->conf.Vpp =
 160                         cfg->vpp1.param[CISTPL_POWER_VNOM]/10000;
 161         else if (dflt->vpp1.present & (1<<CISTPL_POWER_VNOM))
 162                 p_dev->conf.Vpp =
 163                         dflt->vpp1.param[CISTPL_POWER_VNOM]/10000;
 164
 165         /* we need an interrupt */
 166         p_dev->conf.Attributes |= CONF_ENABLE_IRQ;
 167
 168         /* IO window settings */
 169         p_dev->io.NumPorts1 = p_dev->io.NumPorts2 = 0;
 170         if ((cfg->io.nwin > 0) || (dflt->io.nwin > 0)) {
 171                 cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt->io;
 172
 173                 p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
 174                 p_dev->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK;
 175                 p_dev->io.BasePort1 = io->win[0].base;
 176                 p_dev->io.NumPorts1 = io->win[0].len;
 177
 178                 return pcmcia_request_io(p_dev, &p_dev->io);
 179         }
 180         pcmcia_disable_device(p_dev);
 181         return -ENODEV;
 182 }
 183
 184
 185 static int sl811_cs_config(struct pcmcia_device *link)
 186 {
 187         struct device           *parent = &link->dev;
 188         local_info_t            *dev = link->priv;
 189         int                     ret;
 190
 191         dev_dbg(&link->dev, "sl811_cs_config\n");
 192
 193         if (pcmcia_loop_config(link, sl811_cs_config_check, NULL))
 194                 goto failed;
 195
 196         /* require an IRQ and two registers */
 197         if (!link->io.NumPorts1 || link->io.NumPorts1 < 2)
 198                 goto failed;
 199
 200         if (!link->irq)
 201                 goto failed;
 202
 203         ret = pcmcia_request_configuration(link, &link->conf);
 204         if (ret)
 205                 goto failed;
 206
 207         sprintf(dev->node.dev_name, driver_name);
 208         dev->node.major = dev->node.minor = 0;
 209         link->dev_node = &dev->node;
 210
 211         printk(KERN_INFO "%s: index 0x%02x: ",
 212                dev->node.dev_name, link->conf.ConfigIndex);
 213         if (link->conf.Vpp)
 214                 printk(", Vpp %d.%d", link->conf.Vpp/10, link->conf.Vpp%10);
 215         printk(", irq %d", link->irq);
 216         printk(", io 0x%04x-0x%04x", link->io.BasePort1,
 217                link->io.BasePort1+link->io.NumPorts1-1);
 218         printk("\n");
 219
 220         if (sl811_hc_init(parent, link->io.BasePort1, link->irq)
 221                         < 0) {
 222 failed:
 223                 printk(KERN_WARNING "sl811_cs_config failed\n");
 224                 sl811_cs_release(link);
 225                 return  -ENODEV;
 226         }
 227         return 0;
 228 }
 229
 230 static int sl811_cs_probe(struct pcmcia_device *link)
 231 {
 232         local_info_t *local;
 233
 234         local = kzalloc(sizeof(local_info_t), GFP_KERNEL);
 235         if (!local)
 236                 return -ENOMEM;
 237         local->p_dev = link;
 238         link->priv = local;
 239
 240         link->conf.Attributes = 0;
 241         link->conf.IntType = INT_MEMORY_AND_IO;
 242
 243         return sl811_cs_config(link);
 244 }
 245
 246 static struct pcmcia_device_id sl811_ids[] = {
 247         PCMCIA_DEVICE_MANF_CARD(0xc015, 0x0001), /* RATOC USB HOST CF+ Card */
 248         PCMCIA_DEVICE_NULL,
 249 };
 250 MODULE_DEVICE_TABLE(pcmcia, sl811_ids);
 251
 252 static struct pcmcia_driver sl811_cs_driver = {
 253         .owner          = THIS_MODULE,
 254         .drv            = {
 255                 .name   = (char *)driver_name,
 256         },
 257         .probe          = sl811_cs_probe,
 258         .remove         = sl811_cs_detach,
 259         .id_table       = sl811_ids,
 260 };
 261
 262 /*====================================================================*/
 263
 264 static int __init init_sl811_cs(void)
 265 {
 266         return pcmcia_register_driver(&sl811_cs_driver);
 267 }
 268 module_init(init_sl811_cs);
 269
 270 static void __exit exit_sl811_cs(void)
 271 {
 272         pcmcia_unregister_driver(&sl811_cs_driver);
 273 }
 274 module_exit(exit_sl811_cs);