board/bf609-ezkit/soft_switch.c

   1 /*
   2  * U-Boot - main board file
   3  *
   4  * Copyright (c) 2008-2011 Analog Devices Inc.
   5  *
   6  * Licensed under the GPL-2 or later.
   7  */
   8
   9 #include <common.h>
  10 #include <asm/blackfin.h>
  11 #include <asm/io.h>
  12 #include <i2c.h>
  13 #include "soft_switch.h"
  14
  15 struct switch_config {
  16         uchar dir0; /* IODIRA */
  17         uchar dir1; /* IODIRB */
  18         uchar value0; /* OLATA */
  19         uchar value1; /* OLATB */
  20 };
  21
  22 static struct switch_config switch_config_array[NUM_SWITCH] = {
  23         {
  24 /*
  25         U45 Port A                     U45 Port B
  26
  27         7---------------  RMII_CLK_EN  |  7--------------- ~TEMP_THERM_EN
  28         | 6------------- ~CNT0ZM_EN    |  | 6------------- ~TEMP_IRQ_EN
  29         | | 5----------- ~CNT0DG_EN    |  | | 5----------- ~UART0CTS_146_EN
  30         | | | 4--------- ~CNT0UD_EN    |  | | | 4--------- ~UART0CTS_RST_EN
  31         | | | | 3------- ~CAN0RX_EN    |  | | | | 3------- ~UART0CTS_RTS_LPBK
  32         | | | | | 2----- ~CAN0_ERR_EN  |  | | | | | 2----- ~UART0CTS_EN
  33         | | | | | | 1--- ~CAN_STB      |  | | | | | | 1--- ~UART0RX_EN
  34         | | | | | | | 0-  CAN_EN       |  | | | | | | | 0- ~UART0RTS_EN
  35         | | | | | | | |                |  | | | | | | | |
  36         O O O O O O O O                |  O O O O O O O O   (I/O direction)
  37         1 0 0 0 0 0 1 1                |  1 1 1 1 1 0 0 0   (value being set)
  38 */
  39                 .dir0 = 0x0, /* all output */
  40                 .dir1 = 0x0, /* all output */
  41                 .value0 = RMII_CLK_EN | CAN_STB | CAN_EN,
  42                 .value1 = TEMP_THERM_EN | TEMP_IRQ_EN | UART0CTS_146_EN
  43                                 | UART0CTS_RST_EN | UART0CTS_RTS_LPBK,
  44         },
  45         {
  46 /*
  47         U46 Port A                       U46 Port B
  48
  49         7--------------- ~LED4_GPIO_EN   |  7---------------  EMPTY
  50         | 6------------- ~LED3_GPIO_EN   |  | 6------------- ~SPI0D3_EN
  51         | | 5----------- ~LED2_GPIO_EN   |  | | 5----------- ~SPI0D2_EN
  52         | | | 4--------- ~LED1_GPIO_EN   |  | | | 4--------- ~SPIFLASH_CS_EN
  53         | | | | 3-------  SMC0_LP0_EN    |  | | | | 3------- ~SD_WP_EN
  54         | | | | | 2-----  EMPTY          |  | | | | | 2----- ~SD_CD_EN
  55         | | | | | | 1---  SMC0_EPPI2     |  | | | | | | 1--- ~PUSHBUTTON2_EN
  56                           _LP1_SWITCH
  57         | | | | | | | 0-  OVERRIDE_SMC0  |  | | | | | | | 0- ~PUSHBUTTON1_EN
  58                           _LP0_BOOT
  59         | | | | | | | |                  |  | | | | | | | |
  60         O O O O O O O O                  |  O O O O O O O O   (I/O direction)
  61         0 0 0 0 0 X 0 1                  |  X 0 0 0 0 0 0 0   (value being set)
  62 */
  63                 .dir0 = 0x0, /* all output */
  64                 .dir1 = 0x0, /* all output */
  65 #ifdef CONFIG_BFIN_LINKPORT
  66                 .value0 = OVERRIDE_SMC0_LP0_BOOT,
  67 #else
  68                 .value0 = SMC0_EPPI2_LP1_SWITCH,
  69 #endif
  70                 .value1 = 0x0,
  71         },
  72         {
  73 /*
  74         U47 Port A                         U47 Port B
  75
  76         7--------------- ~PD2_SPI0MISO |  7---------------  EMPTY
  77                           _EI3_EN
  78         | 6------------- ~PD1_SPI0D3   |  | 6-------------  EMPTY
  79                           _EPPI1D17
  80                           _SPI0SEL2
  81                           _EI3_EN
  82         | | 5----------- ~PD0_SPI0D2   |  | | 5-----------  EMPTY
  83                           _EPPI1D16
  84                           _SPI0SEL3
  85                           _EI3_EN
  86         | | | 4--------- ~WAKE_PUSH    |  | | | 4---------  EMPTY
  87                           BUTTON_EN
  88         | | | | 3------- ~ETHERNET_EN  |  | | | | 3-------  EMPTY
  89         | | | | | 2-----  PHYAD0       |  | | | | | 2-----  EMPTY
  90         | | | | | | 1---  PHY_PWR      |  | | | | | | 1--- ~PD4_SPI0CK_EI3_EN
  91                           _DWN_INT
  92         | | | | | | | 0- ~PHYINT_EN    |  | | | | | | | 0- ~PD3_SPI0MOSI_EI3_EN
  93         | | | | | | | |                |  | | | | | | | |
  94         O O O O O I I O                |  O O O O O O O O   (I/O direction)
  95         1 1 1 0 0 0 0 0                |  X X X X X X 1 1   (value being set)
  96 */
  97                 .dir0 = 0x6, /* bits 1 and 2 input, all others output */
  98                 .dir1 = 0x0, /* all output */
  99                 .value0 = PD1_SPI0D3_EN | PD0_SPI0D2_EN,
 100                 .value1 = 0,
 101         },
 102 };
 103
 104 static int setup_soft_switch(int addr, struct switch_config *config)
 105 {
 106         int ret = 0;
 107
 108         ret = i2c_write(addr, OLATA, 1, &config->value0, 1);
 109         if (ret)
 110                 return ret;
 111         ret = i2c_write(addr, OLATB, 1, &config->value1, 1);
 112         if (ret)
 113                 return ret;
 114
 115         ret = i2c_write(addr, IODIRA, 1, &config->dir0, 1);
 116         if (ret)
 117                 return ret;
 118         return i2c_write(addr, IODIRB, 1, &config->dir1, 1);
 119 }
 120
 121 int config_switch_bit(int addr, int port, int bit, int dir, uchar value)
 122 {
 123         int ret, data_reg, dir_reg;
 124         uchar tmp;
 125
 126         if (port == IO_PORT_A) {
 127                 data_reg = OLATA;
 128                 dir_reg = IODIRA;
 129         } else {
 130                 data_reg = OLATB;
 131                 dir_reg = IODIRB;
 132         }
 133
 134         if (dir == IO_PORT_INPUT) {
 135                 ret = i2c_read(addr, dir_reg, 1, &tmp, 1);
 136                 if (ret)
 137                         return ret;
 138                 tmp |= bit;
 139                 return i2c_write(addr, dir_reg, 1, &tmp, 1);
 140         } else {
 141                 ret = i2c_read(addr, data_reg, 1, &tmp, 1);
 142                 if (ret)
 143                         return ret;
 144                 if (value)
 145                         tmp |= bit;
 146                 else
 147                         tmp &= ~bit;
 148                 ret = i2c_write(addr, data_reg, 1, &tmp, 1);
 149                 if (ret)
 150                         return ret;
 151                 ret = i2c_read(addr, dir_reg, 1, &tmp, 1);
 152                 if (ret)
 153                         return ret;
 154                 tmp &= ~bit;
 155                 return i2c_write(addr, dir_reg, 1, &tmp, 1);
 156         }
 157 }
 158
 159 int setup_board_switches(void)
 160 {
 161         int ret;
 162         int i;
 163
 164         for (i = 0; i < NUM_SWITCH; i++) {
 165                 ret = setup_soft_switch(SWITCH_ADDR + i,
 166                                 &switch_config_array[i]);
 167                 if (ret)
 168                         return ret;
 169         }
 170         return 0;
 171 }