1/* 2 * linux/drivers/pcmcia/pxa2xx_lubbock.c 3 * 4 * Author: George Davis 5 * Created: Jan 10, 2002 6 * Copyright: MontaVista Software Inc. 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License version 2 as 10 * published by the Free Software Foundation. 11 * 12 * Originally based upon linux/drivers/pcmcia/sa1100_neponset.c 13 * 14 * Lubbock PCMCIA specific routines. 15 * 16 */ 17#include <linux/module.h> 18#include <linux/kernel.h> 19#include <linux/device.h> 20#include <linux/errno.h> 21#include <linux/init.h> 22#include <linux/delay.h> 23 24#include <mach/hardware.h> 25#include <asm/hardware/sa1111.h> 26#include <asm/mach-types.h> 27#include <mach/lubbock.h> 28 29#include "sa1111_generic.h" 30 31static int 32lubbock_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, 33 const socket_state_t *state) 34{ 35 struct sa1111_pcmcia_socket *s = to_skt(skt); 36 unsigned int pa_dwr_mask, pa_dwr_set, misc_mask, misc_set; 37 int ret = 0; 38 39 pa_dwr_mask = pa_dwr_set = misc_mask = misc_set = 0; 40 41 /* Lubbock uses the Maxim MAX1602, with the following connections: 42 * 43 * Socket 0 (PCMCIA): 44 * MAX1602 Lubbock Register 45 * Pin Signal 46 * ----- ------- ---------------------- 47 * A0VPP S0_PWR0 SA-1111 GPIO A<0> 48 * A1VPP S0_PWR1 SA-1111 GPIO A<1> 49 * A0VCC S0_PWR2 SA-1111 GPIO A<2> 50 * A1VCC S0_PWR3 SA-1111 GPIO A<3> 51 * VX VCC 52 * VY +3.3V 53 * 12IN +12V 54 * CODE +3.3V Cirrus Code, CODE = High (VY) 55 * 56 * Socket 1 (CF): 57 * MAX1602 Lubbock Register 58 * Pin Signal 59 * ----- ------- ---------------------- 60 * A0VPP GND VPP is not connected 61 * A1VPP GND VPP is not connected 62 * A0VCC S1_PWR0 MISC_WR<14> 63 * A1VCC S1_PWR1 MISC_WR<15> 64 * VX VCC 65 * VY +3.3V 66 * 12IN GND VPP is not connected 67 * CODE +3.3V Cirrus Code, CODE = High (VY) 68 * 69 */ 70 71 again: 72 switch (skt->nr) { 73 case 0: 74 pa_dwr_mask = GPIO_A0 | GPIO_A1 | GPIO_A2 | GPIO_A3; 75 76 switch (state->Vcc) { 77 case 0: /* Hi-Z */ 78 break; 79 80 case 33: /* VY */ 81 pa_dwr_set |= GPIO_A3; 82 break; 83 84 case 50: /* VX */ 85 pa_dwr_set |= GPIO_A2; 86 break; 87 88 default: 89 printk(KERN_ERR "%s(): unrecognized Vcc %u\n", 90 __func__, state->Vcc); 91 ret = -1; 92 } 93 94 switch (state->Vpp) { 95 case 0: /* Hi-Z */ 96 break; 97 98 case 120: /* 12IN */ 99 pa_dwr_set |= GPIO_A1; 100 break; 101 102 default: /* VCC */ 103 if (state->Vpp == state->Vcc) 104 pa_dwr_set |= GPIO_A0; 105 else { 106 printk(KERN_ERR "%s(): unrecognized Vpp %u\n", 107 __func__, state->Vpp); 108 ret = -1; 109 break; 110 } 111 } 112 break; 113 114 case 1: 115 misc_mask = (1 << 15) | (1 << 14); 116 117 switch (state->Vcc) { 118 case 0: /* Hi-Z */ 119 break; 120 121 case 33: /* VY */ 122 misc_set |= 1 << 15; 123 break; 124 125 case 50: /* VX */ 126 misc_set |= 1 << 14; 127 break; 128 129 default: 130 printk(KERN_ERR "%s(): unrecognized Vcc %u\n", 131 __func__, state->Vcc); 132 ret = -1; 133 break; 134 } 135 136 if (state->Vpp != state->Vcc && state->Vpp != 0) { 137 printk(KERN_ERR "%s(): CF slot cannot support Vpp %u\n", 138 __func__, state->Vpp); 139 ret = -1; 140 break; 141 } 142 break; 143 144 default: 145 ret = -1; 146 } 147 148 if (ret == 0) 149 ret = sa1111_pcmcia_configure_socket(skt, state); 150 151 if (ret == 0) { 152 lubbock_set_misc_wr(misc_mask, misc_set); 153 sa1111_set_io(s->dev, pa_dwr_mask, pa_dwr_set); 154 } 155 156 if (ret == 0 && state->Vcc == 33) { 157 struct pcmcia_state new_state; 158 159 /* 160 * HACK ALERT: 161 * We can't sense the voltage properly on Lubbock before 162 * actually applying some power to the socket (catch 22). 163 * Resense the socket Voltage Sense pins after applying 164 * socket power. 165 * 166 * Note: It takes about 2.5ms for the MAX1602 VCC output 167 * to rise. 168 */ 169 mdelay(3); 170 171 sa1111_pcmcia_socket_state(skt, &new_state); 172 173 if (!new_state.vs_3v && !new_state.vs_Xv) { 174 /* 175 * Switch to 5V, Configure socket with 5V voltage 176 */ 177 lubbock_set_misc_wr(misc_mask, 0); 178 sa1111_set_io(s->dev, pa_dwr_mask, 0); 179 180 /* 181 * It takes about 100ms to turn off Vcc. 182 */ 183 mdelay(100); 184 185 ((socket_state_t *)state)->Vcc = 50; 186 ((socket_state_t *)state)->Vpp = 50; 187 goto again; 188 } 189 } 190 191 return ret; 192} 193 194static struct pcmcia_low_level lubbock_pcmcia_ops = { 195 .owner = THIS_MODULE, 196 .configure_socket = lubbock_pcmcia_configure_socket, 197 .socket_init = sa1111_pcmcia_socket_init, 198 .first = 0, 199 .nr = 2, 200}; 201 202#include "pxa2xx_base.h" 203 204int pcmcia_lubbock_init(struct sa1111_dev *sadev) 205{ 206 int ret = -ENODEV; 207 208 if (machine_is_lubbock()) { 209 /* 210 * Set GPIO_A<3:0> to be outputs for the MAX1600, 211 * and switch to standby mode. 212 */ 213 sa1111_set_io_dir(sadev, GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0, 0); 214 sa1111_set_io(sadev, GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0); 215 sa1111_set_sleep_io(sadev, GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0); 216 217 /* Set CF Socket 1 power to standby mode. */ 218 lubbock_set_misc_wr((1 << 15) | (1 << 14), 0); 219 220 pxa2xx_drv_pcmcia_ops(&lubbock_pcmcia_ops); 221 ret = sa1111_pcmcia_add(sadev, &lubbock_pcmcia_ops, 222 pxa2xx_drv_pcmcia_add_one); 223 } 224 225 return ret; 226} 227 228MODULE_LICENSE("GPL"); 229