1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * linux/drivers/pcmcia/pxa2xx_lubbock.c
4 *
5 * Author: George Davis
6 * Created: Jan 10, 2002
7 * Copyright: MontaVista Software Inc.
8 *
9 * Originally based upon linux/drivers/pcmcia/sa1100_neponset.c
10 *
11 * Lubbock PCMCIA specific routines.
12 */
13 #include <linux/module.h>
14 #include <linux/kernel.h>
15 #include <linux/device.h>
16 #include <linux/errno.h>
17 #include <linux/init.h>
18 #include <linux/delay.h>
19
20 #include <asm/hardware/sa1111.h>
21 #include <asm/mach-types.h>
22
23 #include "sa1111_generic.h"
24 #include "max1600.h"
25
lubbock_pcmcia_hw_init(struct soc_pcmcia_socket * skt)26 static int lubbock_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
27 {
28 struct max1600 *m;
29 int ret;
30
31 ret = max1600_init(skt->socket.dev.parent, &m,
32 skt->nr ? MAX1600_CHAN_B : MAX1600_CHAN_A,
33 MAX1600_CODE_HIGH);
34 if (ret == 0)
35 skt->driver_data = m;
36
37 return ret;
38 }
39
40 static int
lubbock_pcmcia_configure_socket(struct soc_pcmcia_socket * skt,const socket_state_t * state)41 lubbock_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
42 const socket_state_t *state)
43 {
44 struct max1600 *m = skt->driver_data;
45 int ret = 0;
46
47 /* Lubbock uses the Maxim MAX1602, with the following connections:
48 *
49 * Socket 0 (PCMCIA):
50 * MAX1602 Lubbock Register
51 * Pin Signal
52 * ----- ------- ----------------------
53 * A0VPP S0_PWR0 SA-1111 GPIO A<0>
54 * A1VPP S0_PWR1 SA-1111 GPIO A<1>
55 * A0VCC S0_PWR2 SA-1111 GPIO A<2>
56 * A1VCC S0_PWR3 SA-1111 GPIO A<3>
57 * VX VCC
58 * VY +3.3V
59 * 12IN +12V
60 * CODE +3.3V Cirrus Code, CODE = High (VY)
61 *
62 * Socket 1 (CF):
63 * MAX1602 Lubbock Register
64 * Pin Signal
65 * ----- ------- ----------------------
66 * A0VPP GND VPP is not connected
67 * A1VPP GND VPP is not connected
68 * A0VCC S1_PWR0 MISC_WR<14>
69 * A1VCC S1_PWR1 MISC_WR<15>
70 * VX VCC
71 * VY +3.3V
72 * 12IN GND VPP is not connected
73 * CODE +3.3V Cirrus Code, CODE = High (VY)
74 *
75 */
76
77 again:
78 switch (skt->nr) {
79 case 0:
80 case 1:
81 break;
82
83 default:
84 ret = -1;
85 }
86
87 if (ret == 0)
88 ret = sa1111_pcmcia_configure_socket(skt, state);
89 if (ret == 0)
90 ret = max1600_configure(m, state->Vcc, state->Vpp);
91
92 #if 1
93 if (ret == 0 && state->Vcc == 33) {
94 struct pcmcia_state new_state;
95
96 /*
97 * HACK ALERT:
98 * We can't sense the voltage properly on Lubbock before
99 * actually applying some power to the socket (catch 22).
100 * Resense the socket Voltage Sense pins after applying
101 * socket power.
102 *
103 * Note: It takes about 2.5ms for the MAX1602 VCC output
104 * to rise.
105 */
106 mdelay(3);
107
108 sa1111_pcmcia_socket_state(skt, &new_state);
109
110 if (!new_state.vs_3v && !new_state.vs_Xv) {
111 /*
112 * Switch to 5V, Configure socket with 5V voltage
113 */
114 max1600_configure(m, 0, 0);
115
116 /*
117 * It takes about 100ms to turn off Vcc.
118 */
119 mdelay(100);
120
121 /*
122 * We need to hack around the const qualifier as
123 * well to keep this ugly workaround localized and
124 * not force it to the rest of the code. Barf bags
125 * available in the seat pocket in front of you!
126 */
127 ((socket_state_t *)state)->Vcc = 50;
128 ((socket_state_t *)state)->Vpp = 50;
129 goto again;
130 }
131 }
132 #endif
133
134 return ret;
135 }
136
137 static struct pcmcia_low_level lubbock_pcmcia_ops = {
138 .owner = THIS_MODULE,
139 .hw_init = lubbock_pcmcia_hw_init,
140 .configure_socket = lubbock_pcmcia_configure_socket,
141 .first = 0,
142 .nr = 2,
143 };
144
145 #include "pxa2xx_base.h"
146
pcmcia_lubbock_init(struct sa1111_dev * sadev)147 int pcmcia_lubbock_init(struct sa1111_dev *sadev)
148 {
149 pxa2xx_drv_pcmcia_ops(&lubbock_pcmcia_ops);
150 pxa2xx_configure_sockets(&sadev->dev, &lubbock_pcmcia_ops);
151 return sa1111_pcmcia_add(sadev, &lubbock_pcmcia_ops,
152 pxa2xx_drv_pcmcia_add_one);
153 }
154
155 MODULE_LICENSE("GPL");
156
