1 /* 2 * mux.c 3 * 4 * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/ 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License as 8 * published by the Free Software Foundation version 2. 9 * 10 * This program is distributed "as is" WITHOUT ANY WARRANTY of any 11 * kind, whether express or implied; without even the implied warranty 12 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 */ 15 16 #include <config.h> 17 #include "common_def.h" 18 #include <asm/arch/hardware.h> 19 #include <asm/io.h> 20 21 #define MUX_CFG(value, offset) \ 22 __raw_writel(value, (CTRL_BASE + offset)); 23 24 /* PAD Control Fields */ 25 #define SLEWCTRL (0x1 << 6) 26 #define RXACTIVE (0x1 << 5) 27 #define PULLUP_EN (0x1 << 4) /* Pull UP Selection */ 28 #define PULLUDEN (0x0 << 3) /* Pull up enabled */ 29 #define PULLUDDIS (0x1 << 3) /* Pull up disabled */ 30 #define MODE(val) val /* used for Readability */ 31 32 /* 33 * PAD CONTROL OFFSETS 34 * Field names corresponds to the pad signal name 35 */ 36 struct pad_signals { 37 int gpmc_ad0; 38 int gpmc_ad1; 39 int gpmc_ad2; 40 int gpmc_ad3; 41 int gpmc_ad4; 42 int gpmc_ad5; 43 int gpmc_ad6; 44 int gpmc_ad7; 45 int gpmc_ad8; 46 int gpmc_ad9; 47 int gpmc_ad10; 48 int gpmc_ad11; 49 int gpmc_ad12; 50 int gpmc_ad13; 51 int gpmc_ad14; 52 int gpmc_ad15; 53 int gpmc_a0; 54 int gpmc_a1; 55 int gpmc_a2; 56 int gpmc_a3; 57 int gpmc_a4; 58 int gpmc_a5; 59 int gpmc_a6; 60 int gpmc_a7; 61 int gpmc_a8; 62 int gpmc_a9; 63 int gpmc_a10; 64 int gpmc_a11; 65 int gpmc_wait0; 66 int gpmc_wpn; 67 int gpmc_be1n; 68 int gpmc_csn0; 69 int gpmc_csn1; 70 int gpmc_csn2; 71 int gpmc_csn3; 72 int gpmc_clk; 73 int gpmc_advn_ale; 74 int gpmc_oen_ren; 75 int gpmc_wen; 76 int gpmc_be0n_cle; 77 int lcd_data0; 78 int lcd_data1; 79 int lcd_data2; 80 int lcd_data3; 81 int lcd_data4; 82 int lcd_data5; 83 int lcd_data6; 84 int lcd_data7; 85 int lcd_data8; 86 int lcd_data9; 87 int lcd_data10; 88 int lcd_data11; 89 int lcd_data12; 90 int lcd_data13; 91 int lcd_data14; 92 int lcd_data15; 93 int lcd_vsync; 94 int lcd_hsync; 95 int lcd_pclk; 96 int lcd_ac_bias_en; 97 int mmc0_dat3; 98 int mmc0_dat2; 99 int mmc0_dat1; 100 int mmc0_dat0; 101 int mmc0_clk; 102 int mmc0_cmd; 103 int mii1_col; 104 int mii1_crs; 105 int mii1_rxerr; 106 int mii1_txen; 107 int mii1_rxdv; 108 int mii1_txd3; 109 int mii1_txd2; 110 int mii1_txd1; 111 int mii1_txd0; 112 int mii1_txclk; 113 int mii1_rxclk; 114 int mii1_rxd3; 115 int mii1_rxd2; 116 int mii1_rxd1; 117 int mii1_rxd0; 118 int rmii1_refclk; 119 int mdio_data; 120 int mdio_clk; 121 int spi0_sclk; 122 int spi0_d0; 123 int spi0_d1; 124 int spi0_cs0; 125 int spi0_cs1; 126 int ecap0_in_pwm0_out; 127 int uart0_ctsn; 128 int uart0_rtsn; 129 int uart0_rxd; 130 int uart0_txd; 131 int uart1_ctsn; 132 int uart1_rtsn; 133 int uart1_rxd; 134 int uart1_txd; 135 int i2c0_sda; 136 int i2c0_scl; 137 int mcasp0_aclkx; 138 int mcasp0_fsx; 139 int mcasp0_axr0; 140 int mcasp0_ahclkr; 141 int mcasp0_aclkr; 142 int mcasp0_fsr; 143 int mcasp0_axr1; 144 int mcasp0_ahclkx; 145 int xdma_event_intr0; 146 int xdma_event_intr1; 147 int nresetin_out; 148 int porz; 149 int nnmi; 150 int osc0_in; 151 int osc0_out; 152 int rsvd1; 153 int tms; 154 int tdi; 155 int tdo; 156 int tck; 157 int ntrst; 158 int emu0; 159 int emu1; 160 int osc1_in; 161 int osc1_out; 162 int pmic_power_en; 163 int rtc_porz; 164 int rsvd2; 165 int ext_wakeup; 166 int enz_kaldo_1p8v; 167 int usb0_dm; 168 int usb0_dp; 169 int usb0_ce; 170 int usb0_id; 171 int usb0_vbus; 172 int usb0_drvvbus; 173 int usb1_dm; 174 int usb1_dp; 175 int usb1_ce; 176 int usb1_id; 177 int usb1_vbus; 178 int usb1_drvvbus; 179 int ddr_resetn; 180 int ddr_csn0; 181 int ddr_cke; 182 int ddr_ck; 183 int ddr_nck; 184 int ddr_casn; 185 int ddr_rasn; 186 int ddr_wen; 187 int ddr_ba0; 188 int ddr_ba1; 189 int ddr_ba2; 190 int ddr_a0; 191 int ddr_a1; 192 int ddr_a2; 193 int ddr_a3; 194 int ddr_a4; 195 int ddr_a5; 196 int ddr_a6; 197 int ddr_a7; 198 int ddr_a8; 199 int ddr_a9; 200 int ddr_a10; 201 int ddr_a11; 202 int ddr_a12; 203 int ddr_a13; 204 int ddr_a14; 205 int ddr_a15; 206 int ddr_odt; 207 int ddr_d0; 208 int ddr_d1; 209 int ddr_d2; 210 int ddr_d3; 211 int ddr_d4; 212 int ddr_d5; 213 int ddr_d6; 214 int ddr_d7; 215 int ddr_d8; 216 int ddr_d9; 217 int ddr_d10; 218 int ddr_d11; 219 int ddr_d12; 220 int ddr_d13; 221 int ddr_d14; 222 int ddr_d15; 223 int ddr_dqm0; 224 int ddr_dqm1; 225 int ddr_dqs0; 226 int ddr_dqsn0; 227 int ddr_dqs1; 228 int ddr_dqsn1; 229 int ddr_vref; 230 int ddr_vtp; 231 int ddr_strben0; 232 int ddr_strben1; 233 int ain7; 234 int ain6; 235 int ain5; 236 int ain4; 237 int ain3; 238 int ain2; 239 int ain1; 240 int ain0; 241 int vrefp; 242 int vrefn; 243 }; 244 245 struct module_pin_mux { 246 short reg_offset; 247 unsigned char val; 248 }; 249 250 /* Pad control register offset */ 251 #define PAD_CTRL_BASE 0x800 252 #define OFFSET(x) (unsigned int) (&((struct pad_signals *) \ 253 (PAD_CTRL_BASE))->x) 254 255 static struct module_pin_mux uart0_pin_mux[] = { 256 {OFFSET(uart0_rxd), (MODE(0) | PULLUP_EN | RXACTIVE)}, /* UART0_RXD */ 257 {OFFSET(uart0_txd), (MODE(0) | PULLUDEN)}, /* UART0_TXD */ 258 {-1}, 259 }; 260 261 /* 262 * Configure the pin mux for the module 263 */ 264 static void configure_module_pin_mux(struct module_pin_mux *mod_pin_mux) 265 { 266 int i; 267 268 if (!mod_pin_mux) 269 return; 270 271 for (i = 0; mod_pin_mux[i].reg_offset != -1; i++) 272 MUX_CFG(mod_pin_mux[i].val, mod_pin_mux[i].reg_offset); 273 } 274 275 void enable_uart0_pin_mux(void) 276 { 277 configure_module_pin_mux(uart0_pin_mux); 278 } 279