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1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * linux/drivers/pcmcia/pxa2xx_trizeps4.c
4  *
5  * TRIZEPS PCMCIA specific routines.
6  *
7  * Author:	Jürgen Schindele
8  * Created:	20 02, 2006
9  * Copyright:	Jürgen Schindele
10  */
11 
12 #include <linux/module.h>
13 #include <linux/init.h>
14 #include <linux/kernel.h>
15 #include <linux/gpio.h>
16 #include <linux/interrupt.h>
17 #include <linux/platform_device.h>
18 
19 #include <asm/mach-types.h>
20 #include <asm/irq.h>
21 
22 #include <mach/pxa2xx-regs.h>
23 #include <mach/trizeps4.h>
24 
25 #include "soc_common.h"
26 
27 extern void board_pcmcia_power(int power);
28 
trizeps_pcmcia_hw_init(struct soc_pcmcia_socket * skt)29 static int trizeps_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
30 {
31 	/* we dont have voltage/card/ready detection
32 	 * so we dont need interrupts for it
33 	 */
34 	switch (skt->nr) {
35 	case 0:
36 		skt->stat[SOC_STAT_CD].gpio = GPIO_PCD;
37 		skt->stat[SOC_STAT_CD].name = "cs0_cd";
38 		skt->stat[SOC_STAT_RDY].gpio = GPIO_PRDY;
39 		skt->stat[SOC_STAT_RDY].name = "cs0_rdy";
40 		break;
41 	default:
42 		break;
43 	}
44 	/* release the reset of this card */
45 	pr_debug("%s: sock %d irq %d\n", __func__, skt->nr, skt->socket.pci_irq);
46 
47 	return 0;
48 }
49 
50 static unsigned long trizeps_pcmcia_status[2];
51 
trizeps_pcmcia_socket_state(struct soc_pcmcia_socket * skt,struct pcmcia_state * state)52 static void trizeps_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
53 				struct pcmcia_state *state)
54 {
55 	unsigned short status = 0, change;
56 	status = CFSR_readw();
57 	change = (status ^ trizeps_pcmcia_status[skt->nr]) &
58 				ConXS_CFSR_BVD_MASK;
59 	if (change) {
60 		trizeps_pcmcia_status[skt->nr] = status;
61 		if (status & ConXS_CFSR_BVD1) {
62 			/* enable_irq empty */
63 		} else {
64 			/* disable_irq empty */
65 		}
66 	}
67 
68 	switch (skt->nr) {
69 	case 0:
70 		/* just fill in fix states */
71 		state->bvd1   = (status & ConXS_CFSR_BVD1) ? 1 : 0;
72 		state->bvd2   = (status & ConXS_CFSR_BVD2) ? 1 : 0;
73 		state->vs_3v  = (status & ConXS_CFSR_VS1) ? 0 : 1;
74 		state->vs_Xv  = (status & ConXS_CFSR_VS2) ? 0 : 1;
75 		break;
76 
77 #ifndef CONFIG_MACH_TRIZEPS_CONXS
78 	/* on ConXS we only have one slot. Second is inactive */
79 	case 1:
80 		state->detect = 0;
81 		state->ready  = 0;
82 		state->bvd1   = 0;
83 		state->bvd2   = 0;
84 		state->vs_3v  = 0;
85 		state->vs_Xv  = 0;
86 		break;
87 
88 #endif
89 	}
90 }
91 
trizeps_pcmcia_configure_socket(struct soc_pcmcia_socket * skt,const socket_state_t * state)92 static int trizeps_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
93 				const socket_state_t *state)
94 {
95 	int ret = 0;
96 	unsigned short power = 0;
97 
98 	/* we do nothing here just check a bit */
99 	switch (state->Vcc) {
100 	case 0:  power &= 0xfc; break;
101 	case 33: power |= ConXS_BCR_S0_VCC_3V3; break;
102 	case 50:
103 		pr_err("%s(): Vcc 5V not supported in socket\n", __func__);
104 		break;
105 	default:
106 		pr_err("%s(): bad Vcc %u\n", __func__, state->Vcc);
107 		ret = -1;
108 	}
109 
110 	switch (state->Vpp) {
111 	case 0:  power &= 0xf3; break;
112 	case 33: power |= ConXS_BCR_S0_VPP_3V3; break;
113 	case 120:
114 		pr_err("%s(): Vpp 12V not supported in socket\n", __func__);
115 		break;
116 	default:
117 		if (state->Vpp != state->Vcc) {
118 			pr_err("%s(): bad Vpp %u\n", __func__, state->Vpp);
119 			ret = -1;
120 		}
121 	}
122 
123 	switch (skt->nr) {
124 	case 0:			 /* we only have 3.3V */
125 		board_pcmcia_power(power);
126 		break;
127 
128 #ifndef CONFIG_MACH_TRIZEPS_CONXS
129 	/* on ConXS we only have one slot. Second is inactive */
130 	case 1:
131 #endif
132 	default:
133 		break;
134 	}
135 
136 	return ret;
137 }
138 
trizeps_pcmcia_socket_init(struct soc_pcmcia_socket * skt)139 static void trizeps_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
140 {
141 	/* default is on */
142 	board_pcmcia_power(0x9);
143 }
144 
trizeps_pcmcia_socket_suspend(struct soc_pcmcia_socket * skt)145 static void trizeps_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
146 {
147 	board_pcmcia_power(0x0);
148 }
149 
150 static struct pcmcia_low_level trizeps_pcmcia_ops = {
151 	.owner			= THIS_MODULE,
152 	.hw_init		= trizeps_pcmcia_hw_init,
153 	.socket_state		= trizeps_pcmcia_socket_state,
154 	.configure_socket	= trizeps_pcmcia_configure_socket,
155 	.socket_init		= trizeps_pcmcia_socket_init,
156 	.socket_suspend		= trizeps_pcmcia_socket_suspend,
157 #ifdef CONFIG_MACH_TRIZEPS_CONXS
158 	.nr			= 1,
159 #else
160 	.nr			= 2,
161 #endif
162 	.first			= 0,
163 };
164 
165 static struct platform_device *trizeps_pcmcia_device;
166 
trizeps_pcmcia_init(void)167 static int __init trizeps_pcmcia_init(void)
168 {
169 	int ret;
170 
171 	if (!machine_is_trizeps4() && !machine_is_trizeps4wl())
172 		return -ENODEV;
173 
174 	trizeps_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
175 	if (!trizeps_pcmcia_device)
176 		return -ENOMEM;
177 
178 	ret = platform_device_add_data(trizeps_pcmcia_device,
179 			&trizeps_pcmcia_ops, sizeof(trizeps_pcmcia_ops));
180 
181 	if (ret == 0)
182 		ret = platform_device_add(trizeps_pcmcia_device);
183 
184 	if (ret)
185 		platform_device_put(trizeps_pcmcia_device);
186 
187 	return ret;
188 }
189 
trizeps_pcmcia_exit(void)190 static void __exit trizeps_pcmcia_exit(void)
191 {
192 	platform_device_unregister(trizeps_pcmcia_device);
193 }
194 
195 fs_initcall(trizeps_pcmcia_init);
196 module_exit(trizeps_pcmcia_exit);
197 
198 MODULE_LICENSE("GPL");
199 MODULE_AUTHOR("Juergen Schindele");
200 MODULE_ALIAS("platform:pxa2xx-pcmcia");
201