arch/arm/mach-pxa/htcuniversal/htcuniversal_bt.c

   1 /* Bluetooth interface driver for TI BRF6150 on HX4700
   2  *
   3  * Copyright (c) 2005 SDG Systems, LLC
   4  *
   5  * 2005-04-21   Todd Blumer             Created.
   6  */
   7
   8 #include <linux/module.h>
   9 #include <linux/kernel.h>
  10 #include <linux/delay.h>
  11 #include <linux/platform_device.h>
  12 #include <linux/soc/asic3_base.h>
  13
  14 #include <asm/hardware.h>
  15 #include <asm/arch/serial.h>
  16 #include <asm/hardware/ipaq-asic3.h>
  17 #include <asm/arch/htcuniversal-gpio.h>
  18 #include <asm/arch/htcuniversal-asic.h>
  19
  20 #include "htcuniversal_bt.h"
  21
  22 static uint use_led=1;
  23
  24 static void
  25 htcuniversal_bt_configure( int state )
  26 {
  27         int tries;
  28
  29         printk( KERN_NOTICE "htcuniversal configure bluetooth: %d\n", state );
  30         switch (state) {
  31
  32         case PXA_UART_CFG_PRE_STARTUP:
  33                 break;
  34
  35         case PXA_UART_CFG_POST_STARTUP:
  36                 /* pre-serial-up hardware configuration */
  37                 htcuniversal_egpio_enable(EGPIO5_BT_3V3_ON);
  38                 mdelay(50);
  39                 asic3_set_gpio_out_c(&htcuniversal_asic3.dev, 1<<GPIOC_BT_PWR_ON, 1<<GPIOC_BT_PWR_ON);
  40                 mdelay(10);
  41                 asic3_set_gpio_out_c(&htcuniversal_asic3.dev, 1<<GPIOC_BT_RESET, 0);
  42                 mdelay(10);
  43                 asic3_set_gpio_out_c(&htcuniversal_asic3.dev, 1<<GPIOC_BT_RESET, 1<<GPIOC_BT_RESET);
  44                 mdelay(10);
  45
  46                 /*
  47                  * BRF6150's RTS goes low when firmware is ready
  48                  * so check for CTS=1 (nCTS=0 -> CTS=1). Typical 150ms
  49                  */
  50                 tries = 0;
  51                 do {
  52                         mdelay(10);
  53                 } while ((BTMSR & MSR_CTS) == 0 && tries++ < 50);
  54                 if (use_led) {
  55 //                      htcuniversal_set_led(2, 16, 16);
  56                 }
  57                 break;
  58
  59         case PXA_UART_CFG_PRE_SHUTDOWN:
  60                 htcuniversal_egpio_disable(EGPIO5_BT_3V3_ON );
  61                 mdelay(50);
  62 //              htcuniversal_clear_led(2);
  63                 asic3_set_gpio_out_c(&htcuniversal_asic3.dev, 1<<GPIOC_BT_PWR_ON, 0);
  64                 break;
  65
  66         default:
  67                 break;
  68         }
  69 }
  70
  71
  72 static int
  73 htcuniversal_bt_probe( struct platform_device *dev )
  74 {
  75         struct htcuniversal_bt_funcs *funcs = dev->dev.platform_data;
  76
  77         /* configure bluetooth UART */
  78         pxa_gpio_mode( GPIO_NR_HTCUNIVERSAL_BT_RXD_MD );
  79         pxa_gpio_mode( GPIO_NR_HTCUNIVERSAL_BT_TXD_MD );
  80         pxa_gpio_mode( GPIO_NR_HTCUNIVERSAL_BT_UART_CTS_MD );
  81         pxa_gpio_mode( GPIO_NR_HTCUNIVERSAL_BT_UART_RTS_MD );
  82
  83         funcs->configure = htcuniversal_bt_configure;
  84
  85         /* Make sure the LED is off */
  86 //      htcuniversal_clear_led(2);
  87
  88         return 0;
  89 }
  90
  91 static int
  92 htcuniversal_bt_remove( struct platform_device *dev )
  93 {
  94         struct htcuniversal_bt_funcs *funcs = dev->dev.platform_data;
  95
  96         funcs->configure = NULL;
  97
  98         /* Make sure the LED is off */
  99 //      htcuniversal_clear_led(2);
 100
 101         return 0;
 102 }
 103
 104 static struct platform_driver bt_driver = {
 105         .driver = {
 106                 .name     = "htcuniversal_bt",
 107         },
 108         .probe    = htcuniversal_bt_probe,
 109         .remove   = htcuniversal_bt_remove,
 110 };
 111
 112 module_param(use_led, uint, 0);
 113
 114 static int __init
 115 htcuniversal_bt_init( void )
 116 {
 117         printk(KERN_NOTICE "htcuniversal Bluetooth Driver\n");
 118         return platform_driver_register( &bt_driver );
 119 }
 120
 121 static void __exit
 122 htcuniversal_bt_exit( void )
 123 {
 124         platform_driver_unregister( &bt_driver );
 125 }
 126
 127 module_init( htcuniversal_bt_init );
 128 module_exit( htcuniversal_bt_exit );
 129
 130 MODULE_AUTHOR("Todd Blumer, SDG Systems, LLC");
 131 MODULE_DESCRIPTION("HTC Universal Bluetooth Support Driver");
 132 MODULE_LICENSE("GPL");
 133
 134 /* vim600: set noexpandtab sw=8 ts=8 :*/
 135