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https://github.com/brain-hackers/u-boot-brain
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![Bin Meng](/assets/img/avatar_default.png)
Correct spelling of "U-Boot" shall be used in all written text (documentation, comments in source files etc.). Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Heiko Schocher <hs@denx.de> Reviewed-by: Simon Glass <sjg@chromium.org> Reviewed-by: Minkyu Kang <mk7.kang@samsung.com>
172 lines
4.7 KiB
C
172 lines
4.7 KiB
C
/*
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* U-Boot - main board file
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*
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* Copyright (c) 2008-2011 Analog Devices Inc.
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*
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* Licensed under the GPL-2 or later.
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*/
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#include <common.h>
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#include <asm/blackfin.h>
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#include <asm/io.h>
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#include <i2c.h>
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#include "soft_switch.h"
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struct switch_config {
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uchar dir0; /* IODIRA */
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uchar dir1; /* IODIRB */
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uchar value0; /* OLATA */
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uchar value1; /* OLATB */
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};
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static struct switch_config switch_config_array[NUM_SWITCH] = {
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{
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/*
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U45 Port A U45 Port B
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7--------------- RMII_CLK_EN | 7--------------- ~TEMP_THERM_EN
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| 6------------- ~CNT0ZM_EN | | 6------------- ~TEMP_IRQ_EN
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| | 5----------- ~CNT0DG_EN | | | 5----------- ~UART0CTS_146_EN
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| | | 4--------- ~CNT0UD_EN | | | | 4--------- ~UART0CTS_RST_EN
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| | | | 3------- ~CAN0RX_EN | | | | | 3------- ~UART0CTS_RTS_LPBK
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| | | | | 2----- ~CAN0_ERR_EN | | | | | | 2----- ~UART0CTS_EN
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| | | | | | 1--- ~CAN_STB | | | | | | | 1--- ~UART0RX_EN
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| | | | | | | 0- CAN_EN | | | | | | | | 0- ~UART0RTS_EN
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O O O O O O O O | O O O O O O O O (I/O direction)
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1 0 0 0 0 0 1 1 | 1 1 1 1 1 0 0 0 (value being set)
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*/
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.dir0 = 0x0, /* all output */
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.dir1 = 0x0, /* all output */
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.value0 = RMII_CLK_EN | CAN_STB | CAN_EN,
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.value1 = TEMP_THERM_EN | TEMP_IRQ_EN | UART0CTS_146_EN
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| UART0CTS_RST_EN | UART0CTS_RTS_LPBK,
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},
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{
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/*
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U46 Port A U46 Port B
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7--------------- ~LED4_GPIO_EN | 7--------------- EMPTY
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| 6------------- ~LED3_GPIO_EN | | 6------------- ~SPI0D3_EN
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| | 5----------- ~LED2_GPIO_EN | | | 5----------- ~SPI0D2_EN
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| | | 4--------- ~LED1_GPIO_EN | | | | 4--------- ~SPIFLASH_CS_EN
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| | | | 3------- SMC0_LP0_EN | | | | | 3------- ~SD_WP_EN
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| | | | | 2----- EMPTY | | | | | | 2----- ~SD_CD_EN
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| | | | | | 1--- SMC0_EPPI2 | | | | | | | 1--- ~PUSHBUTTON2_EN
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_LP1_SWITCH
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| | | | | | | 0- OVERRIDE_SMC0 | | | | | | | | 0- ~PUSHBUTTON1_EN
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_LP0_BOOT
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O O O O O O O O | O O O O O O O O (I/O direction)
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0 0 0 0 0 X 0 1 | X 0 0 0 0 0 0 0 (value being set)
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*/
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.dir0 = 0x0, /* all output */
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.dir1 = 0x0, /* all output */
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#ifdef CONFIG_BFIN_LINKPORT
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.value0 = OVERRIDE_SMC0_LP0_BOOT,
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#else
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.value0 = SMC0_EPPI2_LP1_SWITCH,
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#endif
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.value1 = 0x0,
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},
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{
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/*
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U47 Port A U47 Port B
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7--------------- ~PD2_SPI0MISO | 7--------------- EMPTY
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_EI3_EN
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| 6------------- ~PD1_SPI0D3 | | 6------------- EMPTY
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_EPPI1D17
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_SPI0SEL2
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_EI3_EN
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| | 5----------- ~PD0_SPI0D2 | | | 5----------- EMPTY
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_EPPI1D16
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_SPI0SEL3
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_EI3_EN
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| | | 4--------- ~WAKE_PUSH | | | | 4--------- EMPTY
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BUTTON_EN
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| | | | 3------- ~ETHERNET_EN | | | | | 3------- EMPTY
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| | | | | 2----- PHYAD0 | | | | | | 2----- EMPTY
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| | | | | | 1--- PHY_PWR | | | | | | | 1--- ~PD4_SPI0CK_EI3_EN
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_DWN_INT
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| | | | | | | 0- ~PHYINT_EN | | | | | | | | 0- ~PD3_SPI0MOSI_EI3_EN
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O O O O O I I O | O O O O O O O O (I/O direction)
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1 1 1 0 0 0 0 0 | X X X X X X 1 1 (value being set)
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*/
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.dir0 = 0x6, /* bits 1 and 2 input, all others output */
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.dir1 = 0x0, /* all output */
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.value0 = PD1_SPI0D3_EN | PD0_SPI0D2_EN,
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.value1 = 0,
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},
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};
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static int setup_soft_switch(int addr, struct switch_config *config)
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{
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int ret = 0;
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ret = i2c_write(addr, OLATA, 1, &config->value0, 1);
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if (ret)
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return ret;
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ret = i2c_write(addr, OLATB, 1, &config->value1, 1);
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if (ret)
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return ret;
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ret = i2c_write(addr, IODIRA, 1, &config->dir0, 1);
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if (ret)
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return ret;
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return i2c_write(addr, IODIRB, 1, &config->dir1, 1);
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}
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int config_switch_bit(int addr, int port, int bit, int dir, uchar value)
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{
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int ret, data_reg, dir_reg;
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uchar tmp;
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if (port == IO_PORT_A) {
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data_reg = OLATA;
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dir_reg = IODIRA;
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} else {
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data_reg = OLATB;
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dir_reg = IODIRB;
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}
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if (dir == IO_PORT_INPUT) {
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ret = i2c_read(addr, dir_reg, 1, &tmp, 1);
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if (ret)
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return ret;
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tmp |= bit;
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return i2c_write(addr, dir_reg, 1, &tmp, 1);
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} else {
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ret = i2c_read(addr, data_reg, 1, &tmp, 1);
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if (ret)
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return ret;
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if (value)
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tmp |= bit;
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else
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tmp &= ~bit;
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ret = i2c_write(addr, data_reg, 1, &tmp, 1);
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if (ret)
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return ret;
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ret = i2c_read(addr, dir_reg, 1, &tmp, 1);
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if (ret)
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return ret;
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tmp &= ~bit;
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return i2c_write(addr, dir_reg, 1, &tmp, 1);
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}
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}
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int setup_board_switches(void)
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{
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int ret;
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int i;
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for (i = 0; i < NUM_SWITCH; i++) {
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ret = setup_soft_switch(SWITCH_ADDR + i,
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&switch_config_array[i]);
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if (ret)
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return ret;
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}
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return 0;
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}
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