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, ioaddr_t base_addr, int irq)
 116 {
 117         if (platform_dev.dev.parent)
 118                 return -EBUSY;
 119         platform_dev.dev.parent = parent;
 120
 121         /* finish seting up the platform device */
 122         resources[0].start = irq;
 123
 124         resources[1].start = base_addr;
 125         resources[1].end = base_addr;
 126
 127         resources[2].start = base_addr + 1;
 128         resources[2].end   = base_addr + 1;
 129
 130         /* The driver core will probe for us.  We know sl811-hcd has been
 131          * initialized already because of the link order dependency created
 132          * by referencing "sl811h_driver".
 133          */
 134         platform_dev.name = sl811h_driver.driver.name;
 135         return platform_device_register(&platform_dev);
 136 }
 137
 138 /*====================================================================*/
 139
 140 static void sl811_cs_detach(struct pcmcia_device *link)
 141 {
 142         DBG(0, "sl811_cs_detach(0x%p)\n", link);
 143
 144         sl811_cs_release(link);
 145
 146         /* This points to the parent local_info_t struct */
 147         kfree(link->priv);
 148 }
 149
 150 static void sl811_cs_release(struct pcmcia_device * link)
 151 {
 152         DBG(0, "sl811_cs_release(0x%p)\n", link);
 153
 154         pcmcia_disable_device(link);
 155         platform_device_unregister(&platform_dev);
 156 }
 157
 158 struct sl811_css_cfg {
 159         cistpl_cftable_entry_t  dflt;
 160         config_info_t           conf;
 161 };
 162
 163 static int sl811_cs_config_check(struct pcmcia_device *p_dev,
 164                                  cistpl_cftable_entry_t *cfg,
 165                                  void *priv_data)
 166 {
 167         struct sl811_css_cfg    *cfg_mem = priv_data;
 168
 169         if (cfg->flags & CISTPL_CFTABLE_DEFAULT)
 170                 memcpy(&cfg_mem->dflt, cfg, sizeof(cistpl_cftable_entry_t));
 171
 172         if (cfg->index == 0)
 173                 return -ENODEV;
 174
 175         /* Use power settings for Vcc and Vpp if present */
 176         /*  Note that the CIS values need to be rescaled */
 177         if (cfg->vcc.present & (1<<CISTPL_POWER_VNOM)) {
 178                 if (cfg->vcc.param[CISTPL_POWER_VNOM]/10000 !=
 179                     cfg_mem->conf.Vcc)
 180                         return -ENODEV;
 181         } else if (cfg_mem->dflt.vcc.present & (1<<CISTPL_POWER_VNOM)) {
 182                 if (cfg_mem->dflt.vcc.param[CISTPL_POWER_VNOM]/10000
 183                     != cfg_mem->conf.Vcc)
 184                         return -ENODEV;
 185                 }
 186
 187         if (cfg->vpp1.present & (1<<CISTPL_POWER_VNOM))
 188                 p_dev->conf.Vpp =
 189                         cfg->vpp1.param[CISTPL_POWER_VNOM]/10000;
 190         else if (cfg_mem->dflt.vpp1.present & (1<<CISTPL_POWER_VNOM))
 191                 p_dev->conf.Vpp =
 192                         cfg_mem->dflt.vpp1.param[CISTPL_POWER_VNOM]/10000;
 193
 194         /* we need an interrupt */
 195         if (cfg->irq.IRQInfo1 || cfg_mem->dflt.irq.IRQInfo1)
 196                 p_dev->conf.Attributes |= CONF_ENABLE_IRQ;
 197
 198         /* IO window settings */
 199         p_dev->io.NumPorts1 = p_dev->io.NumPorts2 = 0;
 200         if ((cfg->io.nwin > 0) || (cfg_mem->dflt.io.nwin > 0)) {
 201                 cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &cfg_mem->dflt.io;
 202
 203                 p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
 204                 p_dev->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK;
 205                 p_dev->io.BasePort1 = io->win[0].base;
 206                 p_dev->io.NumPorts1 = io->win[0].len;
 207
 208                 return pcmcia_request_io(p_dev, &p_dev->io);
 209         }
 210         pcmcia_disable_device(p_dev);
 211         return -ENODEV;
 212 }
 213
 214
 215 static int sl811_cs_config(struct pcmcia_device *link)
 216 {
 217         struct device           *parent = &handle_to_dev(link);
 218         local_info_t            *dev = link->priv;
 219         int                     last_fn, last_ret;
 220         struct sl811_css_cfg    *cfg_mem;
 221
 222         DBG(0, "sl811_cs_config(0x%p)\n", link);
 223
 224         cfg_mem = kzalloc(sizeof(struct sl811_css_cfg), GFP_KERNEL);
 225         if (!cfg_mem)
 226                 return -ENOMEM;
 227
 228         /* Look up the current Vcc */
 229         CS_CHECK(GetConfigurationInfo,
 230                         pcmcia_get_configuration_info(link, &cfg_mem->conf));
 231
 232         if (pcmcia_loop_config(link, sl811_cs_config_check, cfg_mem))
 233                 return -ENODEV;
 234
 235         /* require an IRQ and two registers */
 236         if (!link->io.NumPorts1 || link->io.NumPorts1 < 2)
 237                 goto cs_failed;
 238         if (link->conf.Attributes & CONF_ENABLE_IRQ)
 239                 CS_CHECK(RequestIRQ,
 240                         pcmcia_request_irq(link, &link->irq));
 241         else
 242                 goto cs_failed;
 243
 244         CS_CHECK(RequestConfiguration,
 245                 pcmcia_request_configuration(link, &link->conf));
 246
 247         sprintf(dev->node.dev_name, driver_name);
 248         dev->node.major = dev->node.minor = 0;
 249         link->dev_node = &dev->node;
 250
 251         printk(KERN_INFO "%s: index 0x%02x: ",
 252                dev->node.dev_name, link->conf.ConfigIndex);
 253         if (link->conf.Vpp)
 254                 printk(", Vpp %d.%d", link->conf.Vpp/10, link->conf.Vpp%10);
 255         printk(", irq %d", link->irq.AssignedIRQ);
 256         printk(", io 0x%04x-0x%04x", link->io.BasePort1,
 257                link->io.BasePort1+link->io.NumPorts1-1);
 258         printk("\n");
 259
 260         if (sl811_hc_init(parent, link->io.BasePort1, link->irq.AssignedIRQ)
 261                         < 0) {
 262 cs_failed:
 263                 printk("sl811_cs_config failed\n");
 264                 cs_error(link, last_fn, last_ret);
 265                 sl811_cs_release(link);
 266                 kfree(cfg_mem);
 267                 return  -ENODEV;
 268         }
 269         kfree(cfg_mem);
 270         return 0;
 271 }
 272
 273 static int sl811_cs_probe(struct pcmcia_device *link)
 274 {
 275         local_info_t *local;
 276
 277         local = kzalloc(sizeof(local_info_t), GFP_KERNEL);
 278         if (!local)
 279                 return -ENOMEM;
 280         local->p_dev = link;
 281         link->priv = local;
 282
 283         /* Initialize */
 284         link->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
 285         link->irq.IRQInfo1 = IRQ_INFO2_VALID|IRQ_LEVEL_ID;
 286         link->irq.Handler = NULL;
 287
 288         link->conf.Attributes = 0;
 289         link->conf.IntType = INT_MEMORY_AND_IO;
 290
 291         return sl811_cs_config(link);
 292 }
 293
 294 static struct pcmcia_device_id sl811_ids[] = {
 295         PCMCIA_DEVICE_MANF_CARD(0xc015, 0x0001), /* RATOC USB HOST CF+ Card */
 296         PCMCIA_DEVICE_NULL,
 297 };
 298 MODULE_DEVICE_TABLE(pcmcia, sl811_ids);
 299
 300 static struct pcmcia_driver sl811_cs_driver = {
 301         .owner          = THIS_MODULE,
 302         .drv            = {
 303                 .name   = (char *)driver_name,
 304         },
 305         .probe          = sl811_cs_probe,
 306         .remove         = sl811_cs_detach,
 307         .id_table       = sl811_ids,
 308 };
 309
 310 /*====================================================================*/
 311
 312 static int __init init_sl811_cs(void)
 313 {
 314         return pcmcia_register_driver(&sl811_cs_driver);
 315 }
 316 module_init(init_sl811_cs);
 317
 318 static void __exit exit_sl811_cs(void)
 319 {
 320         pcmcia_unregister_driver(&sl811_cs_driver);
 321 }
 322 module_exit(exit_sl811_cs);