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
lubbock_pcmcia_configure_socket(struct soc_pcmcia_socket * skt,const socket_state_t * state)32 lubbock_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 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(s->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 * available 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,
204 .configure_socket = lubbock_pcmcia_configure_socket,
205 .first = 0,
206 .nr = 2,
207 };
208
209 #include "pxa2xx_base.h"
210
pcmcia_lubbock_init(struct sa1111_dev * sadev)211 int pcmcia_lubbock_init(struct sa1111_dev *sadev)
212 {
213 int ret = -ENODEV;
214
215 if (machine_is_lubbock()) {
216 /*
217 * Set GPIO_A<3:0> to be outputs for the MAX1600,
218 * and switch to standby mode.
219 */
220 sa1111_set_io_dir(sadev, GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0, 0);
221 sa1111_set_io(sadev, GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0);
222 sa1111_set_sleep_io(sadev, GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0);
223
224 /* Set CF Socket 1 power to standby mode. */
225 lubbock_set_misc_wr((1 << 15) | (1 << 14), 0);
226
227 pxa2xx_drv_pcmcia_ops(&lubbock_pcmcia_ops);
228 pxa2xx_configure_sockets(&sadev->dev);
229 ret = sa1111_pcmcia_add(sadev, &lubbock_pcmcia_ops,
230 pxa2xx_drv_pcmcia_add_one);
231 }
232
233 return ret;
234 }
235
236 MODULE_LICENSE("GPL");
237