1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * drivers/pcmcia/sa1100_jornada720.c
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Jornada720 PCMCIA specific routines
6*4882a593Smuzhiyun *
7*4882a593Smuzhiyun */
8*4882a593Smuzhiyun #include <linux/module.h>
9*4882a593Smuzhiyun #include <linux/device.h>
10*4882a593Smuzhiyun #include <linux/errno.h>
11*4882a593Smuzhiyun #include <linux/gpio/consumer.h>
12*4882a593Smuzhiyun #include <linux/init.h>
13*4882a593Smuzhiyun #include <linux/io.h>
14*4882a593Smuzhiyun
15*4882a593Smuzhiyun #include <mach/hardware.h>
16*4882a593Smuzhiyun #include <asm/mach-types.h>
17*4882a593Smuzhiyun
18*4882a593Smuzhiyun #include "sa1111_generic.h"
19*4882a593Smuzhiyun
20*4882a593Smuzhiyun /*
21*4882a593Smuzhiyun * Socket 0 power: GPIO A0
22*4882a593Smuzhiyun * Socket 0 3V: GPIO A2
23*4882a593Smuzhiyun * Socket 1 power: GPIO A1 & GPIO A3
24*4882a593Smuzhiyun * Socket 1 3V: GPIO A3
25*4882a593Smuzhiyun * Does Socket 1 3V actually do anything?
26*4882a593Smuzhiyun */
27*4882a593Smuzhiyun enum {
28*4882a593Smuzhiyun J720_GPIO_PWR,
29*4882a593Smuzhiyun J720_GPIO_3V,
30*4882a593Smuzhiyun J720_GPIO_MAX,
31*4882a593Smuzhiyun };
32*4882a593Smuzhiyun struct jornada720_data {
33*4882a593Smuzhiyun struct gpio_desc *gpio[J720_GPIO_MAX];
34*4882a593Smuzhiyun };
35*4882a593Smuzhiyun
jornada720_pcmcia_hw_init(struct soc_pcmcia_socket * skt)36*4882a593Smuzhiyun static int jornada720_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
37*4882a593Smuzhiyun {
38*4882a593Smuzhiyun struct device *dev = skt->socket.dev.parent;
39*4882a593Smuzhiyun struct jornada720_data *j;
40*4882a593Smuzhiyun
41*4882a593Smuzhiyun j = devm_kzalloc(dev, sizeof(*j), GFP_KERNEL);
42*4882a593Smuzhiyun if (!j)
43*4882a593Smuzhiyun return -ENOMEM;
44*4882a593Smuzhiyun
45*4882a593Smuzhiyun j->gpio[J720_GPIO_PWR] = devm_gpiod_get(dev, skt->nr ? "s1-power" :
46*4882a593Smuzhiyun "s0-power", GPIOD_OUT_LOW);
47*4882a593Smuzhiyun if (IS_ERR(j->gpio[J720_GPIO_PWR]))
48*4882a593Smuzhiyun return PTR_ERR(j->gpio[J720_GPIO_PWR]);
49*4882a593Smuzhiyun
50*4882a593Smuzhiyun j->gpio[J720_GPIO_3V] = devm_gpiod_get(dev, skt->nr ? "s1-3v" :
51*4882a593Smuzhiyun "s0-3v", GPIOD_OUT_LOW);
52*4882a593Smuzhiyun if (IS_ERR(j->gpio[J720_GPIO_3V]))
53*4882a593Smuzhiyun return PTR_ERR(j->gpio[J720_GPIO_3V]);
54*4882a593Smuzhiyun
55*4882a593Smuzhiyun skt->driver_data = j;
56*4882a593Smuzhiyun
57*4882a593Smuzhiyun return 0;
58*4882a593Smuzhiyun }
59*4882a593Smuzhiyun
60*4882a593Smuzhiyun static int
jornada720_pcmcia_configure_socket(struct soc_pcmcia_socket * skt,const socket_state_t * state)61*4882a593Smuzhiyun jornada720_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
62*4882a593Smuzhiyun {
63*4882a593Smuzhiyun struct jornada720_data *j = skt->driver_data;
64*4882a593Smuzhiyun DECLARE_BITMAP(values, J720_GPIO_MAX) = { 0, };
65*4882a593Smuzhiyun int ret;
66*4882a593Smuzhiyun
67*4882a593Smuzhiyun printk(KERN_INFO "%s(): config socket %d vcc %d vpp %d\n", __func__,
68*4882a593Smuzhiyun skt->nr, state->Vcc, state->Vpp);
69*4882a593Smuzhiyun
70*4882a593Smuzhiyun switch (skt->nr) {
71*4882a593Smuzhiyun case 0:
72*4882a593Smuzhiyun switch (state->Vcc) {
73*4882a593Smuzhiyun default:
74*4882a593Smuzhiyun case 0:
75*4882a593Smuzhiyun __assign_bit(J720_GPIO_PWR, values, 0);
76*4882a593Smuzhiyun __assign_bit(J720_GPIO_3V, values, 0);
77*4882a593Smuzhiyun break;
78*4882a593Smuzhiyun case 33:
79*4882a593Smuzhiyun __assign_bit(J720_GPIO_PWR, values, 1);
80*4882a593Smuzhiyun __assign_bit(J720_GPIO_3V, values, 1);
81*4882a593Smuzhiyun break;
82*4882a593Smuzhiyun case 50:
83*4882a593Smuzhiyun __assign_bit(J720_GPIO_PWR, values, 1);
84*4882a593Smuzhiyun __assign_bit(J720_GPIO_3V, values, 0);
85*4882a593Smuzhiyun break;
86*4882a593Smuzhiyun }
87*4882a593Smuzhiyun break;
88*4882a593Smuzhiyun
89*4882a593Smuzhiyun case 1:
90*4882a593Smuzhiyun switch (state->Vcc) {
91*4882a593Smuzhiyun default:
92*4882a593Smuzhiyun case 0:
93*4882a593Smuzhiyun __assign_bit(J720_GPIO_PWR, values, 0);
94*4882a593Smuzhiyun __assign_bit(J720_GPIO_3V, values, 0);
95*4882a593Smuzhiyun break;
96*4882a593Smuzhiyun case 33:
97*4882a593Smuzhiyun case 50:
98*4882a593Smuzhiyun __assign_bit(J720_GPIO_PWR, values, 1);
99*4882a593Smuzhiyun __assign_bit(J720_GPIO_3V, values, 1);
100*4882a593Smuzhiyun break;
101*4882a593Smuzhiyun }
102*4882a593Smuzhiyun break;
103*4882a593Smuzhiyun
104*4882a593Smuzhiyun default:
105*4882a593Smuzhiyun return -1;
106*4882a593Smuzhiyun }
107*4882a593Smuzhiyun
108*4882a593Smuzhiyun if (state->Vpp != state->Vcc && state->Vpp != 0) {
109*4882a593Smuzhiyun printk(KERN_ERR "%s(): slot cannot support VPP %u\n",
110*4882a593Smuzhiyun __func__, state->Vpp);
111*4882a593Smuzhiyun return -EPERM;
112*4882a593Smuzhiyun }
113*4882a593Smuzhiyun
114*4882a593Smuzhiyun ret = sa1111_pcmcia_configure_socket(skt, state);
115*4882a593Smuzhiyun if (ret == 0)
116*4882a593Smuzhiyun ret = gpiod_set_array_value_cansleep(J720_GPIO_MAX, j->gpio,
117*4882a593Smuzhiyun NULL, values);
118*4882a593Smuzhiyun
119*4882a593Smuzhiyun return ret;
120*4882a593Smuzhiyun }
121*4882a593Smuzhiyun
122*4882a593Smuzhiyun static struct pcmcia_low_level jornada720_pcmcia_ops = {
123*4882a593Smuzhiyun .owner = THIS_MODULE,
124*4882a593Smuzhiyun .hw_init = jornada720_pcmcia_hw_init,
125*4882a593Smuzhiyun .configure_socket = jornada720_pcmcia_configure_socket,
126*4882a593Smuzhiyun .first = 0,
127*4882a593Smuzhiyun .nr = 2,
128*4882a593Smuzhiyun };
129*4882a593Smuzhiyun
pcmcia_jornada720_init(struct sa1111_dev * sadev)130*4882a593Smuzhiyun int pcmcia_jornada720_init(struct sa1111_dev *sadev)
131*4882a593Smuzhiyun {
132*4882a593Smuzhiyun /* Fixme: why messing around with SA11x0's GPIO1? */
133*4882a593Smuzhiyun GRER |= 0x00000002;
134*4882a593Smuzhiyun
135*4882a593Smuzhiyun sa11xx_drv_pcmcia_ops(&jornada720_pcmcia_ops);
136*4882a593Smuzhiyun return sa1111_pcmcia_add(sadev, &jornada720_pcmcia_ops,
137*4882a593Smuzhiyun sa11xx_drv_pcmcia_add_one);
138*4882a593Smuzhiyun }
139