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/*
* mux.c
*
* Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation version 2.
*
* This program is distributed "as is" WITHOUT ANY WARRANTY of any
* kind, whether express or implied; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <common.h>
#include <asm/arch/sys_proto.h>
#include <asm/arch/hardware.h>
#include <asm/io.h>
#include <i2c.h>
#define MUX_CFG(value, offset) \
__raw_writel(value, (CTRL_BASE + offset));
/* PAD Control Fields */
#define SLEWCTRL (0x1 << 6)
#define RXACTIVE (0x1 << 5)
#define PULLUP_EN (0x1 << 4) /* Pull UP Selection */
#define PULLUDEN (0x0 << 3) /* Pull up enabled */
#define PULLUDDIS (0x1 << 3) /* Pull up disabled */
#define MODE(val) val /* used for Readability */
/*
* PAD CONTROL OFFSETS
* Field names corresponds to the pad signal name
*/
struct pad_signals {
int gpmc_ad0;
int gpmc_ad1;
int gpmc_ad2;
int gpmc_ad3;
int gpmc_ad4;
int gpmc_ad5;
int gpmc_ad6;
int gpmc_ad7;
int gpmc_ad8;
int gpmc_ad9;
int gpmc_ad10;
int gpmc_ad11;
int gpmc_ad12;
int gpmc_ad13;
int gpmc_ad14;
int gpmc_ad15;
int gpmc_a0;
int gpmc_a1;
int gpmc_a2;
int gpmc_a3;
int gpmc_a4;
int gpmc_a5;
int gpmc_a6;
int gpmc_a7;
int gpmc_a8;
int gpmc_a9;
int gpmc_a10;
int gpmc_a11;
int gpmc_wait0;
int gpmc_wpn;
int gpmc_be1n;
int gpmc_csn0;
int gpmc_csn1;
int gpmc_csn2;
int gpmc_csn3;
int gpmc_clk;
int gpmc_advn_ale;
int gpmc_oen_ren;
int gpmc_wen;
int gpmc_be0n_cle;
int lcd_data0;
int lcd_data1;
int lcd_data2;
int lcd_data3;
int lcd_data4;
int lcd_data5;
int lcd_data6;
int lcd_data7;
int lcd_data8;
int lcd_data9;
int lcd_data10;
int lcd_data11;
int lcd_data12;
int lcd_data13;
int lcd_data14;
int lcd_data15;
int lcd_vsync;
int lcd_hsync;
int lcd_pclk;
int lcd_ac_bias_en;
int mmc0_dat3;
int mmc0_dat2;
int mmc0_dat1;
int mmc0_dat0;
int mmc0_clk;
int mmc0_cmd;
int mii1_col;
int mii1_crs;
int mii1_rxerr;
int mii1_txen;
int mii1_rxdv;
int mii1_txd3;
int mii1_txd2;
int mii1_txd1;
int mii1_txd0;
int mii1_txclk;
int mii1_rxclk;
int mii1_rxd3;
int mii1_rxd2;
int mii1_rxd1;
int mii1_rxd0;
int rmii1_refclk;
int mdio_data;
int mdio_clk;
int spi0_sclk;
int spi0_d0;
int spi0_d1;
int spi0_cs0;
int spi0_cs1;
int ecap0_in_pwm0_out;
int uart0_ctsn;
int uart0_rtsn;
int uart0_rxd;
int uart0_txd;
int uart1_ctsn;
int uart1_rtsn;
int uart1_rxd;
int uart1_txd;
int i2c0_sda;
int i2c0_scl;
int mcasp0_aclkx;
int mcasp0_fsx;
int mcasp0_axr0;
int mcasp0_ahclkr;
int mcasp0_aclkr;
int mcasp0_fsr;
int mcasp0_axr1;
int mcasp0_ahclkx;
int xdma_event_intr0;
int xdma_event_intr1;
int nresetin_out;
int porz;
int nnmi;
int osc0_in;
int osc0_out;
int rsvd1;
int tms;
int tdi;
int tdo;
int tck;
int ntrst;
int emu0;
int emu1;
int osc1_in;
int osc1_out;
int pmic_power_en;
int rtc_porz;
int rsvd2;
int ext_wakeup;
int enz_kaldo_1p8v;
int usb0_dm;
int usb0_dp;
int usb0_ce;
int usb0_id;
int usb0_vbus;
int usb0_drvvbus;
int usb1_dm;
int usb1_dp;
int usb1_ce;
int usb1_id;
int usb1_vbus;
int usb1_drvvbus;
int ddr_resetn;
int ddr_csn0;
int ddr_cke;
int ddr_ck;
int ddr_nck;
int ddr_casn;
int ddr_rasn;
int ddr_wen;
int ddr_ba0;
int ddr_ba1;
int ddr_ba2;
int ddr_a0;
int ddr_a1;
int ddr_a2;
int ddr_a3;
int ddr_a4;
int ddr_a5;
int ddr_a6;
int ddr_a7;
int ddr_a8;
int ddr_a9;
int ddr_a10;
int ddr_a11;
int ddr_a12;
int ddr_a13;
int ddr_a14;
int ddr_a15;
int ddr_odt;
int ddr_d0;
int ddr_d1;
int ddr_d2;
int ddr_d3;
int ddr_d4;
int ddr_d5;
int ddr_d6;
int ddr_d7;
int ddr_d8;
int ddr_d9;
int ddr_d10;
int ddr_d11;
int ddr_d12;
int ddr_d13;
int ddr_d14;
int ddr_d15;
int ddr_dqm0;
int ddr_dqm1;
int ddr_dqs0;
int ddr_dqsn0;
int ddr_dqs1;
int ddr_dqsn1;
int ddr_vref;
int ddr_vtp;
int ddr_strben0;
int ddr_strben1;
int ain7;
int ain6;
int ain5;
int ain4;
int ain3;
int ain2;
int ain1;
int ain0;
int vrefp;
int vrefn;
};
struct module_pin_mux {
short reg_offset;
unsigned char val;
};
/* Pad control register offset */
#define PAD_CTRL_BASE 0x800
#define OFFSET(x) (unsigned int) (&((struct pad_signals *) \
(PAD_CTRL_BASE))->x)
static struct module_pin_mux uart0_pin_mux[] = {
{OFFSET(uart0_rxd), (MODE(0) | PULLUP_EN | RXACTIVE)}, /* UART0_RXD */
{OFFSET(uart0_txd), (MODE(0) | PULLUDEN)}, /* UART0_TXD */
{-1},
};
static struct module_pin_mux mmc0_pin_mux[] = {
{OFFSET(mmc0_dat3), (MODE(0) | RXACTIVE | PULLUP_EN)}, /* MMC0_DAT3 */
{OFFSET(mmc0_dat2), (MODE(0) | RXACTIVE | PULLUP_EN)}, /* MMC0_DAT2 */
{OFFSET(mmc0_dat1), (MODE(0) | RXACTIVE | PULLUP_EN)}, /* MMC0_DAT1 */
{OFFSET(mmc0_dat0), (MODE(0) | RXACTIVE | PULLUP_EN)}, /* MMC0_DAT0 */
{OFFSET(mmc0_clk), (MODE(0) | RXACTIVE | PULLUP_EN)}, /* MMC0_CLK */
{OFFSET(mmc0_cmd), (MODE(0) | RXACTIVE | PULLUP_EN)}, /* MMC0_CMD */
{OFFSET(mcasp0_aclkr), (MODE(4) | RXACTIVE)}, /* MMC0_WP */
{OFFSET(spi0_cs1), (MODE(5) | RXACTIVE | PULLUP_EN)}, /* MMC0_CD */
{-1},
};
static struct module_pin_mux mmc0_pin_mux_sk_evm[] = {
{OFFSET(mmc0_dat3), (MODE(0) | RXACTIVE | PULLUP_EN)}, /* MMC0_DAT3 */
{OFFSET(mmc0_dat2), (MODE(0) | RXACTIVE | PULLUP_EN)}, /* MMC0_DAT2 */
{OFFSET(mmc0_dat1), (MODE(0) | RXACTIVE | PULLUP_EN)}, /* MMC0_DAT1 */
{OFFSET(mmc0_dat0), (MODE(0) | RXACTIVE | PULLUP_EN)}, /* MMC0_DAT0 */
{OFFSET(mmc0_clk), (MODE(0) | RXACTIVE | PULLUP_EN)}, /* MMC0_CLK */
{OFFSET(mmc0_cmd), (MODE(0) | RXACTIVE | PULLUP_EN)}, /* MMC0_CMD */
{OFFSET(spi0_cs1), (MODE(5) | RXACTIVE | PULLUP_EN)}, /* MMC0_CD */
{-1},
};
static struct module_pin_mux mmc1_pin_mux[] = {
{OFFSET(gpmc_ad3), (MODE(1) | RXACTIVE | PULLUP_EN)}, /* MMC1_DAT3 */
{OFFSET(gpmc_ad2), (MODE(1) | RXACTIVE | PULLUP_EN)}, /* MMC1_DAT2 */
{OFFSET(gpmc_ad1), (MODE(1) | RXACTIVE | PULLUP_EN)}, /* MMC1_DAT1 */
{OFFSET(gpmc_ad0), (MODE(1) | RXACTIVE | PULLUP_EN)}, /* MMC1_DAT0 */
{OFFSET(gpmc_csn1), (MODE(2) | RXACTIVE | PULLUP_EN)}, /* MMC1_CLK */
{OFFSET(gpmc_csn2), (MODE(2) | RXACTIVE | PULLUP_EN)}, /* MMC1_CMD */
{OFFSET(gpmc_csn0), (MODE(7) | RXACTIVE | PULLUP_EN)}, /* MMC1_WP */
{OFFSET(gpmc_advn_ale), (MODE(7) | RXACTIVE | PULLUP_EN)}, /* MMC1_CD */
{-1},
};
static struct module_pin_mux i2c0_pin_mux[] = {
{OFFSET(i2c0_sda), (MODE(0) | RXACTIVE |
PULLUDEN | SLEWCTRL)}, /* I2C_DATA */
{OFFSET(i2c0_scl), (MODE(0) | RXACTIVE |
PULLUDEN | SLEWCTRL)}, /* I2C_SCLK */
{-1},
};
static struct module_pin_mux i2c1_pin_mux[] = {
{OFFSET(spi0_d1), (MODE(2) | RXACTIVE |
PULLUDEN | SLEWCTRL)}, /* I2C_DATA */
{OFFSET(spi0_cs0), (MODE(2) | RXACTIVE |
PULLUDEN | SLEWCTRL)}, /* I2C_SCLK */
{-1},
};
static struct module_pin_mux gpio0_7_pin_mux[] = {
{OFFSET(ecap0_in_pwm0_out), (MODE(7) | PULLUDEN)}, /* GPIO0_7 */
{-1},
};
static struct module_pin_mux rgmii1_pin_mux[] = {
{OFFSET(mii1_txen), MODE(2)}, /* RGMII1_TCTL */
{OFFSET(mii1_rxdv), MODE(2) | RXACTIVE}, /* RGMII1_RCTL */
{OFFSET(mii1_txd3), MODE(2)}, /* RGMII1_TD3 */
{OFFSET(mii1_txd2), MODE(2)}, /* RGMII1_TD2 */
{OFFSET(mii1_txd1), MODE(2)}, /* RGMII1_TD1 */
{OFFSET(mii1_txd0), MODE(2)}, /* RGMII1_TD0 */
{OFFSET(mii1_txclk), MODE(2)}, /* RGMII1_TCLK */
{OFFSET(mii1_rxclk), MODE(2) | RXACTIVE}, /* RGMII1_RCLK */
{OFFSET(mii1_rxd3), MODE(2) | RXACTIVE}, /* RGMII1_RD3 */
{OFFSET(mii1_rxd2), MODE(2) | RXACTIVE}, /* RGMII1_RD2 */
{OFFSET(mii1_rxd1), MODE(2) | RXACTIVE}, /* RGMII1_RD1 */
{OFFSET(mii1_rxd0), MODE(2) | RXACTIVE}, /* RGMII1_RD0 */
{OFFSET(mdio_data), MODE(0) | RXACTIVE | PULLUP_EN},/* MDIO_DATA */
{OFFSET(mdio_clk), MODE(0) | PULLUP_EN}, /* MDIO_CLK */
{-1},
};
static struct module_pin_mux mii1_pin_mux[] = {
{OFFSET(mii1_rxerr), MODE(0) | RXACTIVE}, /* MII1_RXERR */
{OFFSET(mii1_txen), MODE(0)}, /* MII1_TXEN */
{OFFSET(mii1_rxdv), MODE(0) | RXACTIVE}, /* MII1_RXDV */
{OFFSET(mii1_txd3), MODE(0)}, /* MII1_TXD3 */
{OFFSET(mii1_txd2), MODE(0)}, /* MII1_TXD2 */
{OFFSET(mii1_txd1), MODE(0)}, /* MII1_TXD1 */
{OFFSET(mii1_txd0), MODE(0)}, /* MII1_TXD0 */
{OFFSET(mii1_txclk), MODE(0) | RXACTIVE}, /* MII1_TXCLK */
{OFFSET(mii1_rxclk), MODE(0) | RXACTIVE}, /* MII1_RXCLK */
{OFFSET(mii1_rxd3), MODE(0) | RXACTIVE}, /* MII1_RXD3 */
{OFFSET(mii1_rxd2), MODE(0) | RXACTIVE}, /* MII1_RXD2 */
{OFFSET(mii1_rxd1), MODE(0) | RXACTIVE}, /* MII1_RXD1 */
{OFFSET(mii1_rxd0), MODE(0) | RXACTIVE}, /* MII1_RXD0 */
{OFFSET(mdio_data), MODE(0) | RXACTIVE | PULLUP_EN}, /* MDIO_DATA */
{OFFSET(mdio_clk), MODE(0) | PULLUP_EN}, /* MDIO_CLK */
{-1},
};
/*
* Configure the pin mux for the module
*/
static void configure_module_pin_mux(struct module_pin_mux *mod_pin_mux)
{
int i;
if (!mod_pin_mux)
return;
for (i = 0; mod_pin_mux[i].reg_offset != -1; i++)
MUX_CFG(mod_pin_mux[i].val, mod_pin_mux[i].reg_offset);
}
void enable_uart0_pin_mux(void)
{
configure_module_pin_mux(uart0_pin_mux);
}
void enable_i2c0_pin_mux(void)
{
configure_module_pin_mux(i2c0_pin_mux);
}
/*
* The AM335x GP EVM, if daughter card(s) are connected, can have 8
* different profiles. These profiles determine what peripherals are
* valid and need pinmux to be configured.
*/
#define PROFILE_NONE 0x0
#define PROFILE_0 (1 << 0)
#define PROFILE_1 (1 << 1)
#define PROFILE_2 (1 << 2)
#define PROFILE_3 (1 << 3)
#define PROFILE_4 (1 << 4)
#define PROFILE_5 (1 << 5)
#define PROFILE_6 (1 << 6)
#define PROFILE_7 (1 << 7)
#define PROFILE_MASK 0x7
#define PROFILE_ALL 0xFF
/* CPLD registers */
#define I2C_CPLD_ADDR 0x35
#define CFG_REG 0x10
static unsigned short detect_daughter_board_profile(void)
{
unsigned short val;
if (i2c_probe(I2C_CPLD_ADDR))
return PROFILE_NONE;
if (i2c_read(I2C_CPLD_ADDR, CFG_REG, 1, (unsigned char *)(&val), 2))
return PROFILE_NONE;
return (1 << (val & PROFILE_MASK));
}
void enable_board_pin_mux(struct am335x_baseboard_id *header)
{
/* Do board-specific muxes. */
if (!strncmp(header->name, "A335BONE", HDR_NAME_LEN)) {
/* Beaglebone pinmux */
configure_module_pin_mux(i2c1_pin_mux);
configure_module_pin_mux(mii1_pin_mux);
configure_module_pin_mux(mmc0_pin_mux);
configure_module_pin_mux(mmc1_pin_mux);
} else if (!strncmp(header->config, "SKU#01", 6)) {
/* General Purpose EVM */
unsigned short profile = detect_daughter_board_profile();
configure_module_pin_mux(rgmii1_pin_mux);
configure_module_pin_mux(mmc0_pin_mux);
/* In profile #2 i2c1 and spi0 conflict. */
if (profile & ~PROFILE_2)
configure_module_pin_mux(i2c1_pin_mux);
else if (profile == PROFILE_2) {
configure_module_pin_mux(mmc1_pin_mux);
}
} else if (!strncmp(header->name, "A335X_SK", HDR_NAME_LEN)) {
/* Starter Kit EVM */
configure_module_pin_mux(i2c1_pin_mux);
configure_module_pin_mux(gpio0_7_pin_mux);
configure_module_pin_mux(rgmii1_pin_mux);
configure_module_pin_mux(mmc0_pin_mux_sk_evm);
} else {
puts("Unknown board, cannot configure pinmux.");
hang();
}
}
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