Gitiles
Code Review Sign In
gerrit-public.fairphone.software / kernel / msm-4.9 / 6d9658df07789a124e5c1f8677afcd7773439f3e / . / drivers / pcmcia / sa1100_neponset.c
blob: 5bc9e9532b9d78f48f00ecd94fdcd5211118bd46 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1/*
2 * linux/drivers/pcmcia/sa1100_neponset.c
3 *
4 * Neponset PCMCIA specific routines
5 */
6#include <linux/module.h>
7#include <linux/kernel.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]8#include <linux/device.h>
9#include <linux/errno.h>
10#include <linux/init.h>
11
12#include <asm/hardware.h>
13#include <asm/mach-types.h>
14#include <asm/arch/neponset.h>
15#include <asm/hardware/sa1111.h>
16
17#include "sa1111_generic.h"
18
19/*
20 * Neponset uses the Maxim MAX1600, with the following connections:
21 *
22 * MAX1600 Neponset
23 *
24 * A0VCC SA-1111 GPIO A<1>
25 * A1VCC SA-1111 GPIO A<0>
26 * A0VPP CPLD NCR A0VPP
27 * A1VPP CPLD NCR A1VPP
28 * B0VCC SA-1111 GPIO A<2>
29 * B1VCC SA-1111 GPIO A<3>
30 * B0VPP ground (slot B is CF)
31 * B1VPP ground (slot B is CF)
32 *
33 * VX VCC (5V)
34 * VY VCC3_3 (3.3V)
35 * 12INA 12V
36 * 12INB ground (slot B is CF)
37 *
38 * The MAX1600 CODE pin is tied to ground, placing the device in
39 * "Standard Intel code" mode. Refer to the Maxim data sheet for
40 * the corresponding truth table.
41 */
42
43static int
44neponset_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
45{
46 unsigned int ncr_mask, ncr_set, pa_dwr_mask, pa_dwr_set;
47 int ret;
48
49 switch (skt->nr) {
50 case 0:
51 pa_dwr_mask = GPIO_A0 | GPIO_A1;
52 ncr_mask = NCR_A0VPP | NCR_A1VPP;
53
54 if (state->Vpp == 0)
55 ncr_set = 0;
56 else if (state->Vpp == 120)
57 ncr_set = NCR_A1VPP;
58 else if (state->Vpp == state->Vcc)
59 ncr_set = NCR_A0VPP;
60 else {
61 printk(KERN_ERR "%s(): unrecognized VPP %u\n",
62 __FUNCTION__, state->Vpp);
63 return -1;
64 }
65 break;
66
67 case 1:
68 pa_dwr_mask = GPIO_A2 | GPIO_A3;
69 ncr_mask = 0;
70 ncr_set = 0;
71
72 if (state->Vpp != state->Vcc && state->Vpp != 0) {
73 printk(KERN_ERR "%s(): CF slot cannot support VPP %u\n",
74 __FUNCTION__, state->Vpp);
75 return -1;
76 }
77 break;
78
79 default:
80 return -1;
81 }
82
83 /*
84 * pa_dwr_set is the mask for selecting Vcc on both sockets.
85 * pa_dwr_mask selects which bits (and therefore socket) we change.
86 */
87 switch (state->Vcc) {
88 default:
89 case 0: pa_dwr_set = 0; break;
90 case 33: pa_dwr_set = GPIO_A1|GPIO_A2; break;
91 case 50: pa_dwr_set = GPIO_A0|GPIO_A3; break;
92 }
93
94 ret = sa1111_pcmcia_configure_socket(skt, state);
95 if (ret == 0) {
96 unsigned long flags;
97
98 local_irq_save(flags);
99 NCR_0 = (NCR_0 & ~ncr_mask) | ncr_set;
100
101 local_irq_restore(flags);
102 sa1111_set_io(SA1111_DEV(skt->dev), pa_dwr_mask, pa_dwr_set);
103 }
104
105 return 0;
106}
107
108static void neponset_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
109{
110 if (skt->nr == 0)
111 NCR_0 &= ~(NCR_A0VPP | NCR_A1VPP);
112
113 sa1111_pcmcia_socket_init(skt);
114}
115
116static struct pcmcia_low_level neponset_pcmcia_ops = {
117 .owner = THIS_MODULE,
118 .hw_init = sa1111_pcmcia_hw_init,
119 .hw_shutdown = sa1111_pcmcia_hw_shutdown,
120 .socket_state = sa1111_pcmcia_socket_state,
121 .configure_socket = neponset_pcmcia_configure_socket,
122 .socket_init = neponset_pcmcia_socket_init,
123 .socket_suspend = sa1111_pcmcia_socket_suspend,
124};
125
126int __init pcmcia_neponset_init(struct sa1111_dev *sadev)
127{
128 int ret = -ENODEV;
129
130 if (machine_is_assabet()) {
131 /*
132 * Set GPIO_A<3:0> to be outputs for the MAX1600,
133 * and switch to standby mode.
134 */
135 sa1111_set_io_dir(sadev, GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0, 0);
136 sa1111_set_io(sadev, GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0);
137 sa1111_set_sleep_io(sadev, GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0);
138 ret = sa11xx_drv_pcmcia_probe(&sadev->dev, &neponset_pcmcia_ops, 0, 2);
139 }
140
141 return ret;
142}