soft_switch.c
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/*
* U-boot - main board file
*
* Copyright (c) 2008-2011 Analog Devices Inc.
*
* Licensed under the GPL-2 or later.
*/
#include <common.h>
#include <asm/blackfin.h>
#include <asm/io.h>
#include <i2c.h>
#include "soft_switch.h"
struct switch_config {
uchar dir0; /* IODIRA */
uchar dir1; /* IODIRB */
uchar value0; /* OLATA */
uchar value1; /* OLATB */
};
static struct switch_config switch_config_array[NUM_SWITCH] = {
{
/*
U45 Port A U45 Port B
7--------------- RMII_CLK_EN | 7--------------- ~TEMP_THERM_EN
| 6------------- ~CNT0ZM_EN | | 6------------- ~TEMP_IRQ_EN
| | 5----------- ~CNT0DG_EN | | | 5----------- ~UART0CTS_146_EN
| | | 4--------- ~CNT0UD_EN | | | | 4--------- ~UART0CTS_RST_EN
| | | | 3------- ~CAN0RX_EN | | | | | 3------- ~UART0CTS_RTS_LPBK
| | | | | 2----- ~CAN0_ERR_EN | | | | | | 2----- ~UART0CTS_EN
| | | | | | 1--- ~CAN_STB | | | | | | | 1--- ~UART0RX_EN
| | | | | | | 0- CAN_EN | | | | | | | | 0- ~UART0RTS_EN
| | | | | | | | | | | | | | | | |
O O O O O O O O | O O O O O O O O (I/O direction)
1 0 0 0 0 0 1 1 | 1 1 1 1 1 0 0 0 (value being set)
*/
.dir0 = 0x0, /* all output */
.dir1 = 0x0, /* all output */
.value0 = RMII_CLK_EN | CAN_STB | CAN_EN,
.value1 = TEMP_THERM_EN | TEMP_IRQ_EN | UART0CTS_146_EN
| UART0CTS_RST_EN | UART0CTS_RTS_LPBK,
},
{
/*
U46 Port A U46 Port B
7--------------- ~LED4_GPIO_EN | 7--------------- EMPTY
| 6------------- ~LED3_GPIO_EN | | 6------------- ~SPI0D3_EN
| | 5----------- ~LED2_GPIO_EN | | | 5----------- ~SPI0D2_EN
| | | 4--------- ~LED1_GPIO_EN | | | | 4--------- ~SPIFLASH_CS_EN
| | | | 3------- SMC0_LP0_EN | | | | | 3------- ~SD_WP_EN
| | | | | 2----- EMPTY | | | | | | 2----- ~SD_CD_EN
| | | | | | 1--- SMC0_EPPI2 | | | | | | | 1--- ~PUSHBUTTON2_EN
_LP1_SWITCH
| | | | | | | 0- OVERRIDE_SMC0 | | | | | | | | 0- ~PUSHBUTTON1_EN
_LP0_BOOT
| | | | | | | | | | | | | | | | |
O O O O O O O O | O O O O O O O O (I/O direction)
0 0 0 0 0 X 0 1 | X 0 0 0 0 0 0 0 (value being set)
*/
.dir0 = 0x0, /* all output */
.dir1 = 0x0, /* all output */
#ifdef CONFIG_BFIN_LINKPORT
.value0 = OVERRIDE_SMC0_LP0_BOOT,
#else
.value0 = SMC0_EPPI2_LP1_SWITCH,
#endif
.value1 = 0x0,
},
{
/*
U47 Port A U47 Port B
7--------------- ~PD2_SPI0MISO | 7--------------- EMPTY
_EI3_EN
| 6------------- ~PD1_SPI0D3 | | 6------------- EMPTY
_EPPI1D17
_SPI0SEL2
_EI3_EN
| | 5----------- ~PD0_SPI0D2 | | | 5----------- EMPTY
_EPPI1D16
_SPI0SEL3
_EI3_EN
| | | 4--------- ~WAKE_PUSH | | | | 4--------- EMPTY
BUTTON_EN
| | | | 3------- ~ETHERNET_EN | | | | | 3------- EMPTY
| | | | | 2----- PHYAD0 | | | | | | 2----- EMPTY
| | | | | | 1--- PHY_PWR | | | | | | | 1--- ~PD4_SPI0CK_EI3_EN
_DWN_INT
| | | | | | | 0- ~PHYINT_EN | | | | | | | | 0- ~PD3_SPI0MOSI_EI3_EN
| | | | | | | | | | | | | | | | |
O O O O O I I O | O O O O O O O O (I/O direction)
1 1 1 0 0 0 0 0 | X X X X X X 1 1 (value being set)
*/
.dir0 = 0x6, /* bits 1 and 2 input, all others output */
.dir1 = 0x0, /* all output */
.value0 = PD1_SPI0D3_EN | PD0_SPI0D2_EN,
.value1 = 0,
},
};
static int setup_soft_switch(int addr, struct switch_config *config)
{
int ret = 0;
ret = i2c_write(addr, OLATA, 1, &config->value0, 1);
if (ret)
return ret;
ret = i2c_write(addr, OLATB, 1, &config->value1, 1);
if (ret)
return ret;
ret = i2c_write(addr, IODIRA, 1, &config->dir0, 1);
if (ret)
return ret;
return i2c_write(addr, IODIRB, 1, &config->dir1, 1);
}
int config_switch_bit(int addr, int port, int bit, int dir, uchar value)
{
int ret, data_reg, dir_reg;
uchar tmp;
if (port == IO_PORT_A) {
data_reg = OLATA;
dir_reg = IODIRA;
} else {
data_reg = OLATB;
dir_reg = IODIRB;
}
if (dir == IO_PORT_INPUT) {
ret = i2c_read(addr, dir_reg, 1, &tmp, 1);
if (ret)
return ret;
tmp |= bit;
return i2c_write(addr, dir_reg, 1, &tmp, 1);
} else {
ret = i2c_read(addr, data_reg, 1, &tmp, 1);
if (ret)
return ret;
if (value)
tmp |= bit;
else
tmp &= ~bit;
ret = i2c_write(addr, data_reg, 1, &tmp, 1);
if (ret)
return ret;
ret = i2c_read(addr, dir_reg, 1, &tmp, 1);
if (ret)
return ret;
tmp &= ~bit;
return i2c_write(addr, dir_reg, 1, &tmp, 1);
}
}
int setup_board_switches(void)
{
int ret;
int i;
for (i = 0; i < NUM_SWITCH; i++) {
ret = setup_soft_switch(SWITCH_ADDR + i,
&switch_config_array[i]);
if (ret)
return ret;
}
return 0;
}