1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * linux/drivers/pcmcia/sa1100_neponset.c
4  *
5  * Neponset PCMCIA specific routines
6  */
7 #include <linux/module.h>
8 #include <linux/kernel.h>
9 #include <linux/device.h>
10 #include <linux/errno.h>
11 #include <linux/init.h>
12 
13 #include <asm/mach-types.h>
14 
15 #include "sa1111_generic.h"
16 #include "max1600.h"
17 
18 /*
19  * Neponset uses the Maxim MAX1600, with the following connections:
20  *
21  *   MAX1600      Neponset
22  *
23  *    A0VCC        SA-1111 GPIO A<1>
24  *    A1VCC        SA-1111 GPIO A<0>
25  *    A0VPP        CPLD NCR A0VPP
26  *    A1VPP        CPLD NCR A1VPP
27  *    B0VCC        SA-1111 GPIO A<2>
28  *    B1VCC        SA-1111 GPIO A<3>
29  *    B0VPP        ground (slot B is CF)
30  *    B1VPP        ground (slot B is CF)
31  *
32  *     VX          VCC (5V)
33  *     VY          VCC3_3 (3.3V)
34  *     12INA       12V
35  *     12INB       ground (slot B is CF)
36  *
37  * The MAX1600 CODE pin is tied to ground, placing the device in
38  * "Standard Intel code" mode. Refer to the Maxim data sheet for
39  * the corresponding truth table.
40  */
41 static int neponset_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
42 {
43 	struct max1600 *m;
44 	int ret;
45 
46 	ret = max1600_init(skt->socket.dev.parent, &m,
47 			   skt->nr ? MAX1600_CHAN_B : MAX1600_CHAN_A,
48 			   MAX1600_CODE_LOW);
49 	if (ret == 0)
50 		skt->driver_data = m;
51 
52 	return ret;
53 }
54 
55 static int
56 neponset_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
57 {
58 	struct max1600 *m = skt->driver_data;
59 	int ret;
60 
61 	ret = sa1111_pcmcia_configure_socket(skt, state);
62 	if (ret == 0)
63 		ret = max1600_configure(m, state->Vcc, state->Vpp);
64 
65 	return ret;
66 }
67 
68 static struct pcmcia_low_level neponset_pcmcia_ops = {
69 	.owner			= THIS_MODULE,
70 	.hw_init		= neponset_pcmcia_hw_init,
71 	.configure_socket	= neponset_pcmcia_configure_socket,
72 	.first			= 0,
73 	.nr			= 2,
74 };
75 
76 int pcmcia_neponset_init(struct sa1111_dev *sadev)
77 {
78 	sa11xx_drv_pcmcia_ops(&neponset_pcmcia_ops);
79 	return sa1111_pcmcia_add(sadev, &neponset_pcmcia_ops,
80 				 sa11xx_drv_pcmcia_add_one);
81 }
82