drivers/net/wireless/acx/hx4700_acx.c

   1 /*
   2  * WLAN (TI TNETW1100B) support in the hx470x.
   3  *
   4  * Copyright (c) 2006 SDG Systems, LLC
   5  *
   6  * This file is subject to the terms and conditions of the GNU General Public
   7  * License.  See the file COPYING in the main directory of this archive for
   8  * more details.
   9  *
  10  * 28-March-2006          Todd Blumer <todd@sdgsystems.com>
  11  */
  12
  13
  14 #include <linux/kernel.h>
  15 #include <linux/platform_device.h>
  16 #include <linux/delay.h>
  17 #include <linux/leds.h>
  18
  19 #include <asm/hardware.h>
  20
  21 #include <asm/arch/pxa-regs.h>
  22 #include <asm/arch/hx4700-gpio.h>
  23 #include <asm/arch/hx4700-core.h>
  24 #include <asm/io.h>
  25
  26 #include "acx_hw.h"
  27
  28 #define WLAN_OFFSET     0x1000000
  29 #define WLAN_BASE       (PXA_CS5_PHYS+WLAN_OFFSET)
  30
  31
  32 static int
  33 hx4700_wlan_start( void )
  34 {
  35         SET_HX4700_GPIO( WLAN_RESET_N, 0 );
  36         mdelay(5);
  37         hx4700_egpio_enable( EGPIO0_VCC_3V3_EN );
  38         mdelay(100);
  39         hx4700_egpio_enable( EGPIO7_VCC_3V3_WL_EN );
  40         mdelay(150);
  41         hx4700_egpio_enable( EGPIO1_WL_VREG_EN | EGPIO2_VCC_2V1_WL_EN |
  42                              EGPIO6_WL1V8_EN );
  43         mdelay(10);
  44         SET_HX4700_GPIO( WLAN_RESET_N, 1 );
  45         mdelay(50);
  46         led_trigger_event_shared(hx4700_radio_trig, LED_FULL);
  47         return 0;
  48 }
  49
  50 static int
  51 hx4700_wlan_stop( void )
  52 {
  53         hx4700_egpio_disable( EGPIO0_VCC_3V3_EN | EGPIO1_WL_VREG_EN |
  54                               EGPIO7_VCC_3V3_WL_EN | EGPIO2_VCC_2V1_WL_EN |
  55                               EGPIO6_WL1V8_EN );
  56         SET_HX4700_GPIO( WLAN_RESET_N, 0 );
  57         led_trigger_event_shared(hx4700_radio_trig, LED_OFF);
  58         return 0;
  59 }
  60
  61 static struct resource acx_resources[] = {
  62         [0] = {
  63                 .start  = WLAN_BASE,
  64                 .end    = WLAN_BASE + 0x20,
  65                 .flags  = IORESOURCE_MEM,
  66         },
  67         [1] = {
  68                 .start  = HX4700_IRQ(WLAN_IRQ_N),
  69                 .end    = HX4700_IRQ(WLAN_IRQ_N),
  70                 .flags  = IORESOURCE_IRQ,
  71         },
  72 };
  73
  74 static struct acx_hardware_data acx_data = {
  75         .start_hw       = hx4700_wlan_start,
  76         .stop_hw        = hx4700_wlan_stop,
  77 };
  78
  79 static struct platform_device acx_device = {
  80         .name   = "acx-mem",
  81         .dev    = {
  82                 .platform_data = &acx_data,
  83         },
  84         .num_resources  = ARRAY_SIZE( acx_resources ),
  85         .resource       = acx_resources,
  86 };
  87
  88 static int __init
  89 hx4700_wlan_init( void )
  90 {
  91         printk( "hx4700_wlan_init: acx-mem platform_device_register\n" );
  92         return platform_device_register( &acx_device );
  93 }
  94
  95
  96 static void __exit
  97 hx4700_wlan_exit( void )
  98 {
  99         platform_device_unregister( &acx_device );
 100 }
 101
 102 module_init( hx4700_wlan_init );
 103 module_exit( hx4700_wlan_exit );
 104
 105 MODULE_AUTHOR( "Todd Blumer <todd@sdgsystems.com>" );
 106 MODULE_DESCRIPTION( "WLAN driver for iPAQ hx4700" );
 107 MODULE_LICENSE( "GPL" );
 108