Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | #include <linux/device.h> |
| 20 | #include <linux/errno.h> |
| 21 | #include <linux/init.h> |
| 22 | #include <linux/delay.h> |
| 23 | |
Russell King | be50972 | 2008-08-04 10:41:28 +0100 | [diff] [blame^] | 24 | #include <asm/arch/hardware.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | #include <asm/hardware/sa1111.h> |
| 26 | #include <asm/mach-types.h> |
| 27 | #include <asm/arch/pxa-regs.h> |
| 28 | #include <asm/arch/lubbock.h> |
| 29 | |
| 30 | #include "sa1111_generic.h" |
| 31 | |
| 32 | static int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | lubbock_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, |
| 34 | const socket_state_t *state) |
| 35 | { |
| 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", |
Harvey Harrison | 2e11cb4 | 2008-05-01 04:34:54 -0700 | [diff] [blame] | 90 | __func__, state->Vcc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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", |
Harvey Harrison | 2e11cb4 | 2008-05-01 04:34:54 -0700 | [diff] [blame] | 107 | __func__, state->Vpp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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", |
Harvey Harrison | 2e11cb4 | 2008-05-01 04:34:54 -0700 | [diff] [blame] | 131 | __func__, state->Vcc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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", |
Harvey Harrison | 2e11cb4 | 2008-05-01 04:34:54 -0700 | [diff] [blame] | 138 | __func__, state->Vpp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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(SA1111_DEV(skt->dev), pa_dwr_mask, pa_dwr_set); |
| 154 | } |
| 155 | |
| 156 | #if 1 |
| 157 | if (ret == 0 && state->Vcc == 33) { |
| 158 | struct pcmcia_state new_state; |
| 159 | |
| 160 | /* |
| 161 | * HACK ALERT: |
| 162 | * We can't sense the voltage properly on Lubbock before |
| 163 | * actually applying some power to the socket (catch 22). |
| 164 | * Resense the socket Voltage Sense pins after applying |
| 165 | * socket power. |
| 166 | * |
| 167 | * Note: It takes about 2.5ms for the MAX1602 VCC output |
| 168 | * to rise. |
| 169 | */ |
| 170 | mdelay(3); |
| 171 | |
| 172 | sa1111_pcmcia_socket_state(skt, &new_state); |
| 173 | |
| 174 | if (!new_state.vs_3v && !new_state.vs_Xv) { |
| 175 | /* |
| 176 | * Switch to 5V, Configure socket with 5V voltage |
| 177 | */ |
| 178 | lubbock_set_misc_wr(misc_mask, 0); |
| 179 | sa1111_set_io(SA1111_DEV(skt->dev), pa_dwr_mask, 0); |
| 180 | |
| 181 | /* |
| 182 | * It takes about 100ms to turn off Vcc. |
| 183 | */ |
| 184 | mdelay(100); |
| 185 | |
| 186 | /* |
| 187 | * We need to hack around the const qualifier as |
| 188 | * well to keep this ugly workaround localized and |
| 189 | * not force it to the rest of the code. Barf bags |
| 190 | * avaliable in the seat pocket in front of you! |
| 191 | */ |
| 192 | ((socket_state_t *)state)->Vcc = 50; |
| 193 | ((socket_state_t *)state)->Vpp = 50; |
| 194 | goto again; |
| 195 | } |
| 196 | } |
| 197 | #endif |
| 198 | |
| 199 | return ret; |
| 200 | } |
| 201 | |
| 202 | static struct pcmcia_low_level lubbock_pcmcia_ops = { |
| 203 | .owner = THIS_MODULE, |
Russell King | 693d9d9 | 2007-10-02 11:28:26 +0100 | [diff] [blame] | 204 | .hw_init = sa1111_pcmcia_hw_init, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | .hw_shutdown = sa1111_pcmcia_hw_shutdown, |
| 206 | .socket_state = sa1111_pcmcia_socket_state, |
| 207 | .configure_socket = lubbock_pcmcia_configure_socket, |
| 208 | .socket_init = sa1111_pcmcia_socket_init, |
| 209 | .socket_suspend = sa1111_pcmcia_socket_suspend, |
| 210 | .first = 0, |
| 211 | .nr = 2, |
| 212 | }; |
| 213 | |
| 214 | #include "pxa2xx_base.h" |
| 215 | |
David Brownell | 7bbaac1 | 2007-12-22 14:03:29 -0800 | [diff] [blame] | 216 | int pcmcia_lubbock_init(struct sa1111_dev *sadev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | { |
| 218 | int ret = -ENODEV; |
| 219 | |
| 220 | if (machine_is_lubbock()) { |
| 221 | /* |
| 222 | * Set GPIO_A<3:0> to be outputs for the MAX1600, |
| 223 | * and switch to standby mode. |
| 224 | */ |
| 225 | sa1111_set_io_dir(sadev, GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0, 0); |
| 226 | sa1111_set_io(sadev, GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0); |
| 227 | sa1111_set_sleep_io(sadev, GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0); |
| 228 | |
| 229 | /* Set CF Socket 1 power to standby mode. */ |
| 230 | lubbock_set_misc_wr((1 << 15) | (1 << 14), 0); |
| 231 | |
| 232 | sadev->dev.platform_data = &lubbock_pcmcia_ops; |
Russell King | 9468613 | 2006-10-28 22:42:56 +0100 | [diff] [blame] | 233 | ret = __pxa2xx_drv_pcmcia_probe(&sadev->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | } |
| 235 | |
| 236 | return ret; |
| 237 | } |
| 238 | |
| 239 | MODULE_LICENSE("GPL"); |