1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * drivers/pcmcia/sa1100_jornada720.c
4  *
5  * Jornada720 PCMCIA specific routines
6  *
7  */
8 #include <linux/module.h>
9 #include <linux/kernel.h>
10 #include <linux/device.h>
11 #include <linux/errno.h>
12 #include <linux/init.h>
13 #include <linux/io.h>
14 
15 #include <mach/hardware.h>
16 #include <asm/hardware/sa1111.h>
17 #include <asm/mach-types.h>
18 
19 #include "sa1111_generic.h"
20 
21 /* Does SOCKET1_3V actually do anything? */
22 #define SOCKET0_POWER	GPIO_GPIO0
23 #define SOCKET0_3V	GPIO_GPIO2
24 #define SOCKET1_POWER	(GPIO_GPIO1 | GPIO_GPIO3)
25 #define SOCKET1_3V	GPIO_GPIO3
26 
27 static int
28 jornada720_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
29 {
30 	struct sa1111_pcmcia_socket *s = to_skt(skt);
31 	unsigned int pa_dwr_mask, pa_dwr_set;
32 	int ret;
33 
34 	printk(KERN_INFO "%s(): config socket %d vcc %d vpp %d\n", __func__,
35 		skt->nr, state->Vcc, state->Vpp);
36 
37 	switch (skt->nr) {
38 	case 0:
39 		pa_dwr_mask = SOCKET0_POWER | SOCKET0_3V;
40 
41 		switch (state->Vcc) {
42 		default:
43 		case  0:
44 			pa_dwr_set = 0;
45 			break;
46 		case 33:
47 			pa_dwr_set = SOCKET0_POWER | SOCKET0_3V;
48 			break;
49 		case 50:
50 			pa_dwr_set = SOCKET0_POWER;
51 			break;
52 		}
53 		break;
54 
55 	case 1:
56 		pa_dwr_mask = SOCKET1_POWER;
57 
58 		switch (state->Vcc) {
59 		default:
60 		case 0:
61 			pa_dwr_set = 0;
62 			break;
63 		case 33:
64 			pa_dwr_set = SOCKET1_POWER;
65 			break;
66 		case 50:
67 			pa_dwr_set = SOCKET1_POWER;
68 			break;
69 		}
70 		break;
71 
72 	default:
73 		return -1;
74 	}
75 
76 	if (state->Vpp != state->Vcc && state->Vpp != 0) {
77 		printk(KERN_ERR "%s(): slot cannot support VPP %u\n",
78 			__func__, state->Vpp);
79 		return -EPERM;
80 	}
81 
82 	ret = sa1111_pcmcia_configure_socket(skt, state);
83 	if (ret == 0)
84 		sa1111_set_io(s->dev, pa_dwr_mask, pa_dwr_set);
85 
86 	return ret;
87 }
88 
89 static struct pcmcia_low_level jornada720_pcmcia_ops = {
90 	.owner			= THIS_MODULE,
91 	.configure_socket	= jornada720_pcmcia_configure_socket,
92 	.first			= 0,
93 	.nr			= 2,
94 };
95 
96 int pcmcia_jornada720_init(struct sa1111_dev *sadev)
97 {
98 	unsigned int pin = GPIO_A0 | GPIO_A1 | GPIO_A2 | GPIO_A3;
99 
100 	/* Fixme: why messing around with SA11x0's GPIO1? */
101 	GRER |= 0x00000002;
102 
103 	/* Set GPIO_A<3:1> to be outputs for PCMCIA/CF power controller: */
104 	sa1111_set_io_dir(sadev, pin, 0, 0);
105 	sa1111_set_io(sadev, pin, 0);
106 	sa1111_set_sleep_io(sadev, pin, 0);
107 
108 	sa11xx_drv_pcmcia_ops(&jornada720_pcmcia_ops);
109 	return sa1111_pcmcia_add(sadev, &jornada720_pcmcia_ops,
110 				 sa11xx_drv_pcmcia_add_one);
111 }
112