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
31 static int
32 lubbock_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
33 const socket_state_t *state)
34 {
35 unsigned int pa_dwr_mask, pa_dwr_set, misc_mask, misc_set;
36 int ret = 0;
37
38 pa_dwr_mask = pa_dwr_set = misc_mask = misc_set = 0;
39
40 /* Lubbock uses the Maxim MAX1602, with the following connections:
41 *
42 * Socket 0 (PCMCIA):
43 * MAX1602 Lubbock Register
44 * Pin Signal
45 * ----- ------- ----------------------
46 * A0VPP S0_PWR0 SA-1111 GPIO A<0>
47 * A1VPP S0_PWR1 SA-1111 GPIO A<1>
48 * A0VCC S0_PWR2 SA-1111 GPIO A<2>
49 * A1VCC S0_PWR3 SA-1111 GPIO A<3>
50 * VX VCC
51 * VY +3.3V
52 * 12IN +12V
53 * CODE +3.3V Cirrus Code, CODE = High (VY)
54 *
55 * Socket 1 (CF):
56 * MAX1602 Lubbock Register
57 * Pin Signal
58 * ----- ------- ----------------------
59 * A0VPP GND VPP is not connected
60 * A1VPP GND VPP is not connected
61 * A0VCC S1_PWR0 MISC_WR<14>
62 * A1VCC S1_PWR1 MISC_WR<15>
63 * VX VCC
64 * VY +3.3V
65 * 12IN GND VPP is not connected
66 * CODE +3.3V Cirrus Code, CODE = High (VY)
67 *
68 */
69
70 again:
71 switch (skt->nr) {
72 case 0:
73 pa_dwr_mask = GPIO_A0 | GPIO_A1 | GPIO_A2 | GPIO_A3;
74
75 switch (state->Vcc) {
76 case 0: /* Hi-Z */
77 break;
78
79 case 33: /* VY */
80 pa_dwr_set |= GPIO_A3;
81 break;
82
83 case 50: /* VX */
84 pa_dwr_set |= GPIO_A2;
85 break;
86
87 default:
88 printk(KERN_ERR "%s(): unrecognized Vcc %u\n",
89 __func__, state->Vcc);
90 ret = -1;
91 }
92
93 switch (state->Vpp) {
94 case 0: /* Hi-Z */
95 break;
96
97 case 120: /* 12IN */
98 pa_dwr_set |= GPIO_A1;
99 break;
100
101 default: /* VCC */
102 if (state->Vpp == state->Vcc)
103 pa_dwr_set |= GPIO_A0;
104 else {
105 printk(KERN_ERR "%s(): unrecognized Vpp %u\n",
106 __func__, state->Vpp);
107 ret = -1;
108 break;
109 }
110 }
111 break;
112
113 case 1:
114 misc_mask = (1 << 15) | (1 << 14);
115
116 switch (state->Vcc) {
117 case 0: /* Hi-Z */
118 break;
119
120 case 33: /* VY */
121 misc_set |= 1 << 15;
122 break;
123
124 case 50: /* VX */
125 misc_set |= 1 << 14;
126 break;
127
128 default:
129 printk(KERN_ERR "%s(): unrecognized Vcc %u\n",
130 __func__, state->Vcc);
131 ret = -1;
132 break;
133 }
134
135 if (state->Vpp != state->Vcc && state->Vpp != 0) {
136 printk(KERN_ERR "%s(): CF slot cannot support Vpp %u\n",
137 __func__, state->Vpp);
138 ret = -1;
139 break;
140 }
141 break;
142
143 default:
144 ret = -1;
145 }
146
147 if (ret == 0)
148 ret = sa1111_pcmcia_configure_socket(skt, state);
149
150 if (ret == 0) {
151 lubbock_set_misc_wr(misc_mask, misc_set);
152 sa1111_set_io(SA1111_DEV(skt->dev), pa_dwr_mask, pa_dwr_set);
153 }
154
155 #if 1
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(SA1111_DEV(skt->dev), pa_dwr_mask, 0);
179
180 /*
181 * It takes about 100ms to turn off Vcc.
182 */
183 mdelay(100);
184
185 /*
186 * We need to hack around the const qualifier as
187 * well to keep this ugly workaround localized and
188 * not force it to the rest of the code. Barf bags
189 * avaliable in the seat pocket in front of you!
190 */
191 ((socket_state_t *)state)->Vcc = 50;
192 ((socket_state_t *)state)->Vpp = 50;
193 goto again;
194 }
195 }
196 #endif
197
198 return ret;
199 }
200
201 static struct pcmcia_low_level lubbock_pcmcia_ops = {
202 .owner = THIS_MODULE,
203 .hw_init = sa1111_pcmcia_hw_init,
204 .hw_shutdown = sa1111_pcmcia_hw_shutdown,
205 .socket_state = sa1111_pcmcia_socket_state,
206 .configure_socket = lubbock_pcmcia_configure_socket,
207 .socket_init = sa1111_pcmcia_socket_init,
208 .socket_suspend = sa1111_pcmcia_socket_suspend,
209 .first = 0,
210 .nr = 2,
211 };
212
213 #include "pxa2xx_base.h"
214
215 int pcmcia_lubbock_init(struct sa1111_dev *sadev)
216 {
217 int ret = -ENODEV;
218
219 if (machine_is_lubbock()) {
220 /*
221 * Set GPIO_A<3:0> to be outputs for the MAX1600,
222 * and switch to standby mode.
223 */
224 sa1111_set_io_dir(sadev, GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0, 0);
225 sa1111_set_io(sadev, GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0);
226 sa1111_set_sleep_io(sadev, GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0);
227
228 /* Set CF Socket 1 power to standby mode. */
229 lubbock_set_misc_wr((1 << 15) | (1 << 14), 0);
230
231 sadev->dev.platform_data = &lubbock_pcmcia_ops;
232 ret = __pxa2xx_drv_pcmcia_probe(&sadev->dev);
233 }
234
235 return ret;
236 }
237
238 MODULE_LICENSE("GPL");
239
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