arch/arm/mach-pxa/htcsable/htcsable_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/htcsable-gpio.h>
  18 #include <asm/arch/htcsable-asic.h>
  19
  20 #include "htcsable_bt.h"
  21
  22 extern struct platform_device htcsable_asic3;
  23
  24 static uint use_led=1;
  25
  26 static void
  27 htcsable_bt_configure( int state )
  28 {
  29         int tries;
  30
  31         printk( KERN_NOTICE "htcsable configure bluetooth: %d\n", state );
  32         switch (state) {
  33
  34         case PXA_UART_CFG_PRE_STARTUP:
  35                 break;
  36
  37         case PXA_UART_CFG_POST_STARTUP:
  38                 /* pre-serial-up hardware configuration */
  39                 /*htcsable_egpio_enable(EGPIO6_BT_3V3_ON);*/
  40                 mdelay(50);
  41                 asic3_set_gpio_out_d(&htcsable_asic3.dev, 1<<GPIOD_BT_PWR_ON, 1<<GPIOD_BT_PWR_ON);
  42                 mdelay(10);
  43                 asic3_set_gpio_out_c(&htcsable_asic3.dev, 1<<GPIOC_BT_RESET, 0);
  44                 mdelay(10);
  45                 asic3_set_gpio_out_c(&htcsable_asic3.dev, 1<<GPIOC_BT_RESET, 1<<GPIOC_BT_RESET);
  46                 mdelay(10);
  47
  48                 /*
  49                  * BRF6150's RTS goes low when firmware is ready
  50                  * so check for CTS=1 (nCTS=0 -> CTS=1). Typical 150ms
  51                  */
  52                 tries = 0;
  53                 do {
  54                         mdelay(10);
  55                 } while ((FFMSR & MSR_CTS) == 0 && tries++ < 50);
  56                 if (use_led) {
  57 //                      htcsable_set_led(2, 16, 16);
  58                 }
  59                 break;
  60
  61         case PXA_UART_CFG_PRE_SHUTDOWN:
  62                 /*htcsable_egpio_disable(EGPIO6_BT_3V3_ON );*/
  63                 mdelay(50);
  64 //              htcsable_clear_led(2);
  65                 asic3_set_gpio_out_d(&htcsable_asic3.dev, 1<<GPIOD_BT_PWR_ON, 0);
  66                 mdelay(10);
  67                 asic3_set_gpio_out_c(&htcsable_asic3.dev, 1<<GPIOC_BT_RESET, 0);
  68                 break;
  69
  70         default:
  71                 break;
  72         }
  73 }
  74
  75
  76 static int
  77 htcsable_bt_probe( struct device *dev )
  78 {
  79         struct htcsable_bt_funcs *funcs = (struct htcsable_bt_funcs *) dev->platform_data;
  80
  81         /* configure bluetooth UART */
  82         pxa_gpio_mode( GPIO_NR_HTCSABLE_BT_RXD_MD );
  83         pxa_gpio_mode( GPIO_NR_HTCSABLE_BT_TXD_MD );
  84         pxa_gpio_mode( GPIO_NR_HTCSABLE_BT_UART_CTS_MD );
  85         pxa_gpio_mode( GPIO_NR_HTCSABLE_BT_UART_RTS_MD );
  86
  87         funcs->configure = htcsable_bt_configure;
  88
  89         /* Make sure the LED is off */
  90 //      htcsable_clear_led(2);
  91
  92         return 0;
  93 }
  94
  95 static int
  96 htcsable_bt_remove( struct device *dev )
  97 {
  98         struct htcsable_bt_funcs *funcs = (struct htcsable_bt_funcs *) dev->platform_data;
  99
 100         funcs->configure = NULL;
 101
 102         /* Make sure the LED is off */
 103 //      htcsable_clear_led(2);
 104
 105         return 0;
 106 }
 107
 108 static struct device_driver bt_driver = {
 109         .name     = "htcsable_bt",
 110         .bus      = &platform_bus_type,
 111         .probe    = htcsable_bt_probe,
 112         .remove   = htcsable_bt_remove,
 113 };
 114
 115 module_param(use_led, uint, 0);
 116
 117 static int __init
 118 htcsable_bt_init( void )
 119 {
 120         printk(KERN_NOTICE "htcsable Bluetooth Driver\n");
 121         return driver_register( &bt_driver );
 122 }
 123
 124 static void __exit
 125 htcsable_bt_exit( void )
 126 {
 127         driver_unregister( &bt_driver );
 128 }
 129
 130 module_init( htcsable_bt_init );
 131 module_exit( htcsable_bt_exit );
 132
 133 MODULE_AUTHOR("Todd Blumer, SDG Systems, LLC");
 134 MODULE_DESCRIPTION("HTC Sable Bluetooth Support Driver");
 135 MODULE_LICENSE("GPL");
 136
 137 /* vim600: set noexpandtab sw=8 ts=8 :*/
 138