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 #if defined(DEBUG) || defined(PCMCIA_DEBUG)
  41
  42 static int pc_debug = 0;
  43 module_param(pc_debug, int, 0644);
  44
  45 #define DBG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG "sl811_cs: " args)
  46
  47 #else
  48 #define DBG(n, args...) do{}while(0)
  49 #endif  /* no debugging */
  50
  51 #define INFO(args...) printk(KERN_INFO "sl811_cs: " args)
  52
  53 #define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0444)
  54
  55 #define CS_CHECK(fn, ret) \
  56         do { \
  57                 last_fn = (fn); \
  58                 if ((last_ret = (ret)) != 0) \
  59                         goto cs_failed; \
  60         } while (0)
  61
  62 /*====================================================================*/
  63 /* VARIABLES                                                          */
  64 /*====================================================================*/
  65
  66 static const char driver_name[DEV_NAME_LEN]  = "sl811_cs";
  67
  68 typedef struct local_info_t {
  69         struct pcmcia_device    *p_dev;
  70         dev_node_t              node;
  71 } local_info_t;
  72
  73 static void sl811_cs_release(struct pcmcia_device * link);
  74
  75 /*====================================================================*/
  76
  77 static void release_platform_dev(struct device * dev)
  78 {
  79         DBG(0, "sl811_cs platform_dev release\n");
  80         dev->parent = NULL;
  81 }
  82
  83 static struct sl811_platform_data platform_data = {
  84         .potpg          = 100,
  85         .power          = 50,           /* == 100mA */
  86         // .reset       = ... FIXME:  invoke CF reset on the card
  87 };
  88
  89 static struct resource resources[] = {
  90         [0] = {
  91                 .flags  = IORESOURCE_IRQ,
  92         },
  93         [1] = {
  94                 // .name   = "address",
  95                 .flags  = IORESOURCE_IO,
  96         },
  97         [2] = {
  98                 // .name   = "data",
  99                 .flags  = IORESOURCE_IO,
 100         },
 101 };
 102
 103 extern struct platform_driver sl811h_driver;
 104
 105 static struct platform_device platform_dev = {
 106         .id                     = -1,
 107         .dev = {
 108                 .platform_data = &platform_data,
 109                 .release       = release_platform_dev,
 110         },
 111         .resource               = resources,
 112         .num_resources          = ARRAY_SIZE(resources),
 113 };
 114
 115 static int sl811_hc_init(struct device *parent, resource_size_t base_addr,
 116                          int irq)
 117 {
 118         if (platform_dev.dev.parent)
 119                 return -EBUSY;
 120         platform_dev.dev.parent = parent;
 121
 122         /* finish seting up the platform device */
 123         resources[0].start = irq;
 124
 125         resources[1].start = base_addr;
 126         resources[1].end = base_addr;
 127
 128         resources[2].start = base_addr + 1;
 129         resources[2].end   = base_addr + 1;
 130
 131         /* The driver core will probe for us.  We know sl811-hcd has been
 132          * initialized already because of the link order dependency created
 133          * by referencing "sl811h_driver".
 134          */
 135         platform_dev.name = sl811h_driver.driver.name;
 136         return platform_device_register(&platform_dev);
 137 }
 138
 139 /*====================================================================*/
 140
 141 static void sl811_cs_detach(struct pcmcia_device *link)
 142 {
 143         DBG(0, "sl811_cs_detach(0x%p)\n", link);
 144
 145         sl811_cs_release(link);
 146
 147         /* This points to the parent local_info_t struct */
 148         kfree(link->priv);
 149 }
 150
 151 static void sl811_cs_release(struct pcmcia_device * link)
 152 {
 153         DBG(0, "sl811_cs_release(0x%p)\n", link);
 154
 155         pcmcia_disable_device(link);
 156         platform_device_unregister(&platform_dev);
 157 }
 158
 159 static int sl811_cs_config_check(struct pcmcia_device *p_dev,
 160                                  cistpl_cftable_entry_t *cfg,
 161                                  cistpl_cftable_entry_t *dflt,
 162                                  unsigned int vcc,
 163                                  void *priv_data)
 164 {
 165         if (cfg->index == 0)
 166                 return -ENODEV;
 167
 168         /* Use power settings for Vcc and Vpp if present */
 169         /*  Note that the CIS values need to be rescaled */
 170         if (cfg->vcc.present & (1<<CISTPL_POWER_VNOM)) {
 171                 if (cfg->vcc.param[CISTPL_POWER_VNOM]/10000 != vcc)
 172                         return -ENODEV;
 173         } else if (dflt->vcc.present & (1<<CISTPL_POWER_VNOM)) {
 174                 if (dflt->vcc.param[CISTPL_POWER_VNOM]/10000 != vcc)
 175                         return -ENODEV;
 176                 }
 177
 178         if (cfg->vpp1.present & (1<<CISTPL_POWER_VNOM))
 179                 p_dev->conf.Vpp =
 180                         cfg->vpp1.param[CISTPL_POWER_VNOM]/10000;
 181         else if (dflt->vpp1.present & (1<<CISTPL_POWER_VNOM))
 182                 p_dev->conf.Vpp =
 183                         dflt->vpp1.param[CISTPL_POWER_VNOM]/10000;
 184
 185         /* we need an interrupt */
 186         if (cfg->irq.IRQInfo1 || dflt->irq.IRQInfo1)
 187                 p_dev->conf.Attributes |= CONF_ENABLE_IRQ;
 188
 189         /* IO window settings */
 190         p_dev->io.NumPorts1 = p_dev->io.NumPorts2 = 0;
 191         if ((cfg->io.nwin > 0) || (dflt->io.nwin > 0)) {
 192                 cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt->io;
 193
 194                 p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
 195                 p_dev->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK;
 196                 p_dev->io.BasePort1 = io->win[0].base;
 197                 p_dev->io.NumPorts1 = io->win[0].len;
 198
 199                 return pcmcia_request_io(p_dev, &p_dev->io);
 200         }
 201         pcmcia_disable_device(p_dev);
 202         return -ENODEV;
 203 }
 204
 205
 206 static int sl811_cs_config(struct pcmcia_device *link)
 207 {
 208         struct device           *parent = &handle_to_dev(link);
 209         local_info_t            *dev = link->priv;
 210         int                     last_fn, last_ret;
 211
 212         DBG(0, "sl811_cs_config(0x%p)\n", link);
 213
 214         if (pcmcia_loop_config(link, sl811_cs_config_check, NULL))
 215                 goto failed;
 216
 217         /* require an IRQ and two registers */
 218         if (!link->io.NumPorts1 || link->io.NumPorts1 < 2)
 219                 goto failed;
 220         if (link->conf.Attributes & CONF_ENABLE_IRQ)
 221                 CS_CHECK(RequestIRQ,
 222                         pcmcia_request_irq(link, &link->irq));
 223         else
 224                 goto failed;
 225
 226         CS_CHECK(RequestConfiguration,
 227                 pcmcia_request_configuration(link, &link->conf));
 228
 229         sprintf(dev->node.dev_name, driver_name);
 230         dev->node.major = dev->node.minor = 0;
 231         link->dev_node = &dev->node;
 232
 233         printk(KERN_INFO "%s: index 0x%02x: ",
 234                dev->node.dev_name, link->conf.ConfigIndex);
 235         if (link->conf.Vpp)
 236                 printk(", Vpp %d.%d", link->conf.Vpp/10, link->conf.Vpp%10);
 237         printk(", irq %d", link->irq.AssignedIRQ);
 238         printk(", io 0x%04x-0x%04x", link->io.BasePort1,
 239                link->io.BasePort1+link->io.NumPorts1-1);
 240         printk("\n");
 241
 242         if (sl811_hc_init(parent, link->io.BasePort1, link->irq.AssignedIRQ)
 243                         < 0) {
 244 cs_failed:
 245                 cs_error(link, last_fn, last_ret);
 246 failed:
 247                 printk(KERN_WARNING "sl811_cs_config failed\n");
 248                 sl811_cs_release(link);
 249                 return  -ENODEV;
 250         }
 251         return 0;
 252 }
 253
 254 static int sl811_cs_probe(struct pcmcia_device *link)
 255 {
 256         local_info_t *local;
 257
 258         local = kzalloc(sizeof(local_info_t), GFP_KERNEL);
 259         if (!local)
 260                 return -ENOMEM;
 261         local->p_dev = link;
 262         link->priv = local;
 263
 264         /* Initialize */
 265         link->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
 266         link->irq.IRQInfo1 = IRQ_INFO2_VALID|IRQ_LEVEL_ID;
 267         link->irq.Handler = NULL;
 268
 269         link->conf.Attributes = 0;
 270         link->conf.IntType = INT_MEMORY_AND_IO;
 271
 272         return sl811_cs_config(link);
 273 }
 274
 275 static struct pcmcia_device_id sl811_ids[] = {
 276         PCMCIA_DEVICE_MANF_CARD(0xc015, 0x0001), /* RATOC USB HOST CF+ Card */
 277         PCMCIA_DEVICE_NULL,
 278 };
 279 MODULE_DEVICE_TABLE(pcmcia, sl811_ids);
 280
 281 static struct pcmcia_driver sl811_cs_driver = {
 282         .owner          = THIS_MODULE,
 283         .drv            = {
 284                 .name   = (char *)driver_name,
 285         },
 286         .probe          = sl811_cs_probe,
 287         .remove         = sl811_cs_detach,
 288         .id_table       = sl811_ids,
 289 };
 290
 291 /*====================================================================*/
 292
 293 static int __init init_sl811_cs(void)
 294 {
 295         return pcmcia_register_driver(&sl811_cs_driver);
 296 }
 297 module_init(init_sl811_cs);
 298
 299 static void __exit exit_sl811_cs(void)
 300 {
 301         pcmcia_unregister_driver(&sl811_cs_driver);
 302 }
 303 module_exit(exit_sl811_cs);