arch/arm/mach-pxa/h5400/h5400_wifi.c

   1 /*
   2  * Driver for iPAQ H5400 internal USB OHCI host controller
   3  *
   4  * Copyright 2003 Hewlett-Packard Company.
   5  *
   6  * Use consistent with the GNU GPL is permitted,
   7  * provided that this copyright notice is
   8  * preserved in its entirety in all copies and derived works.
   9  *
  10  * COMPAQ COMPUTER CORPORATION MAKES NO WARRANTIES, EXPRESSED OR IMPLIED,
  11  * AS TO THE USEFULNESS OR CORRECTNESS OF THIS CODE OR ITS
  12  * FITNESS FOR ANY PARTICULAR PURPOSE.
  13  *
  14  * Author: Jamey Hicks.
  15  *
  16  * History:
  17  *
  18  * 2003-03-19   Jamey Hicks        Created file.
  19  *
  20  */
  21
  22 #include <linux/module.h>
  23 #include <linux/version.h>
  24 #include <linux/config.h>
  25 #include <linux/init.h>
  26 #include <linux/device.h>
  27 #include <linux/soc-old.h>
  28 #include <linux/usb.h>
  29 #include <linux/slab.h>
  30 #define CONFIG_PCI
  31 #include <linux/pci.h> /* pci_pool defs */
  32
  33 #include <asm/arch/hardware.h>
  34 #include <asm/irq.h>
  35
  36 #include <asm/arch-pxa/h5400-asic.h>
  37
  38 #include <asm/hardware/samcop_base.h>
  39
  40 typedef struct ohci ohci_t;
  41
  42 extern int hc_add_ohci(struct pci_dev *dev, int irq, void *mem_base, unsigned long flags,
  43                                  ohci_t **ohci, const char *name, const char *slot_name);
  44 extern void hc_remove_ohci(ohci_t *ohci);
  45
  46 static void
  47 h5400_ohci_remove (struct device *dev)
  48 {
  49 #if 0
  50 #warning port to kernel 2.6
  51         if (dev->driver_data) {
  52                 hc_remove_ohci (dev->driver_data);
  53                 dev->driver_data = NULL;
  54         }
  55 #endif
  56
  57         samcop_set_gpio_b (dev->parent, SAMCOP_GPIO_GPB_RF_POWER_ON | SAMCOP_GPIO_GPB_WLAN_POWER_ON, 0);
  58 }
  59
  60 static int
  61 h5400_ohci_probe (struct device *dev)
  62 {
  63         struct platform_device *sdev;
  64         int irq;
  65         void *mem_base;
  66         unsigned long flags = 0;
  67         int result = 0;
  68
  69         sdev = to_platform_device (dev);
  70         mem_base = (void *)sdev->resource[1].start;
  71         irq = sdev->resource[2].start;
  72
  73         /* make sure the clocks are enabled */
  74         samcop_clock_enable (dev->parent, SAMCOP_CPM_CLKCON_USBHOST_CLKEN, 1);
  75         samcop_clock_enable (dev->parent, SAMCOP_CPM_CLKCON_UCLK_EN, 0);
  76
  77         /* both needed? */
  78         samcop_set_gpio_b (dev->parent, SAMCOP_GPIO_GPB_RF_POWER_ON | SAMCOP_GPIO_GPB_WLAN_POWER_ON,
  79                            SAMCOP_GPIO_GPB_RF_POWER_ON | SAMCOP_GPIO_GPB_WLAN_POWER_ON);
  80
  81 #if 0
  82 #warning port to kernel 2.6
  83         msleep (100);
  84
  85         result = hc_add_ohci (pcidev, irq, mem_base, flags, (ohci_t **)&dev->driver_data, "h5400-ohci", "asic");
  86         if (result)
  87                 h5400_ohci_remove (dev);
  88 #endif
  89
  90         return result;
  91 }
  92
  93 static int
  94 h5400_ohci_suspend (struct device *dev, u32 state, u32 level)
  95 {
  96 }
  97
  98 static int
  99 h5400_ohci_resume (struct device *dev, u32 level)
 100 {
 101         return 0;
 102 }
 103
 104 static platform_device_id h5400_usb_device_ids[] = { IPAQ_SAMCOP_USBH_DEVICE_ID, 0 };
 105
 106 struct device_driver h5400_usb_device_driver = {
 107         .name     = "h5400 wifi",
 108         .probe    = h5400_ohci_probe,
 109         .shutdown = h5400_ohci_remove,
 110         .suspend  = h5400_ohci_suspend,
 111         .resume   = h5400_ohci_resume
 112 };
 113
 114 static int __init
 115 h5400_ohci_init (void)
 116 {
 117         return driver_register (&h5400_usb_device_driver);
 118 }
 119
 120 static void __exit
 121 h5400_ohci_exit (void)
 122 {
 123         driver_unregister (&h5400_usb_device_driver);
 124 }
 125
 126 module_init(h5400_ohci_init);
 127 module_exit(h5400_ohci_exit);