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 <mach/hardware.h>
21 #include <asm/hardware/sa1111.h>
22 #include <asm/mach-types.h>
23
24 #include "sa1111_generic.h"
25 #include "max1600.h"
26
lubbock_pcmcia_hw_init(struct soc_pcmcia_socket * skt)27 static int lubbock_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
28 {
29 struct max1600 *m;
30 int ret;
31
32 ret = max1600_init(skt->socket.dev.parent, &m,
33 skt->nr ? MAX1600_CHAN_B : MAX1600_CHAN_A,
34 MAX1600_CODE_HIGH);
35 if (ret == 0)
36 skt->driver_data = m;
37
38 return ret;
39 }
40
41 static int
lubbock_pcmcia_configure_socket(struct soc_pcmcia_socket * skt,const socket_state_t * state)42 lubbock_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
43 const socket_state_t *state)
44 {
45 struct max1600 *m = skt->driver_data;
46 int ret = 0;
47
48 /* Lubbock uses the Maxim MAX1602, with the following connections:
49 *
50 * Socket 0 (PCMCIA):
51 * MAX1602 Lubbock Register
52 * Pin Signal
53 * ----- ------- ----------------------
54 * A0VPP S0_PWR0 SA-1111 GPIO A<0>
55 * A1VPP S0_PWR1 SA-1111 GPIO A<1>
56 * A0VCC S0_PWR2 SA-1111 GPIO A<2>
57 * A1VCC S0_PWR3 SA-1111 GPIO A<3>
58 * VX VCC
59 * VY +3.3V
60 * 12IN +12V
61 * CODE +3.3V Cirrus Code, CODE = High (VY)
62 *
63 * Socket 1 (CF):
64 * MAX1602 Lubbock Register
65 * Pin Signal
66 * ----- ------- ----------------------
67 * A0VPP GND VPP is not connected
68 * A1VPP GND VPP is not connected
69 * A0VCC S1_PWR0 MISC_WR<14>
70 * A1VCC S1_PWR1 MISC_WR<15>
71 * VX VCC
72 * VY +3.3V
73 * 12IN GND VPP is not connected
74 * CODE +3.3V Cirrus Code, CODE = High (VY)
75 *
76 */
77
78 again:
79 switch (skt->nr) {
80 case 0:
81 case 1:
82 break;
83
84 default:
85 ret = -1;
86 }
87
88 if (ret == 0)
89 ret = sa1111_pcmcia_configure_socket(skt, state);
90 if (ret == 0)
91 ret = max1600_configure(m, state->Vcc, state->Vpp);
92
93 #if 1
94 if (ret == 0 && state->Vcc == 33) {
95 struct pcmcia_state new_state;
96
97 /*
98 * HACK ALERT:
99 * We can't sense the voltage properly on Lubbock before
100 * actually applying some power to the socket (catch 22).
101 * Resense the socket Voltage Sense pins after applying
102 * socket power.
103 *
104 * Note: It takes about 2.5ms for the MAX1602 VCC output
105 * to rise.
106 */
107 mdelay(3);
108
109 sa1111_pcmcia_socket_state(skt, &new_state);
110
111 if (!new_state.vs_3v && !new_state.vs_Xv) {
112 /*
113 * Switch to 5V, Configure socket with 5V voltage
114 */
115 max1600_configure(m, 0, 0);
116
117 /*
118 * It takes about 100ms to turn off Vcc.
119 */
120 mdelay(100);
121
122 /*
123 * We need to hack around the const qualifier as
124 * well to keep this ugly workaround localized and
125 * not force it to the rest of the code. Barf bags
126 * available in the seat pocket in front of you!
127 */
128 ((socket_state_t *)state)->Vcc = 50;
129 ((socket_state_t *)state)->Vpp = 50;
130 goto again;
131 }
132 }
133 #endif
134
135 return ret;
136 }
137
138 static struct pcmcia_low_level lubbock_pcmcia_ops = {
139 .owner = THIS_MODULE,
140 .hw_init = lubbock_pcmcia_hw_init,
141 .configure_socket = lubbock_pcmcia_configure_socket,
142 .first = 0,
143 .nr = 2,
144 };
145
146 #include "pxa2xx_base.h"
147
pcmcia_lubbock_init(struct sa1111_dev * sadev)148 int pcmcia_lubbock_init(struct sa1111_dev *sadev)
149 {
150 pxa2xx_drv_pcmcia_ops(&lubbock_pcmcia_ops);
151 pxa2xx_configure_sockets(&sadev->dev, &lubbock_pcmcia_ops);
152 return sa1111_pcmcia_add(sadev, &lubbock_pcmcia_ops,
153 pxa2xx_drv_pcmcia_add_one);
154 }
155
156 MODULE_LICENSE("GPL");
157