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1/*
2 * linux/drivers/pcmcia/pxa2xx_mainstone.c
3 *
4 * Mainstone PCMCIA specific routines.
5 *
6 * Created: May 12, 2004
7 * Author: Nicolas Pitre
8 * Copyright: MontaVista Software Inc.
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 */
14
15#include <linux/module.h>
16#include <linux/init.h>
17#include <linux/kernel.h>
18#include <linux/errno.h>
19#include <linux/interrupt.h>
20#include <linux/platform_device.h>
21
22#include <pcmcia/ss.h>
23
24#include <asm/mach-types.h>
25#include <asm/irq.h>
26
27#include <mach/pxa2xx-regs.h>
28#include <mach/mainstone.h>
29
30#include "soc_common.h"
31
32
33static struct pcmcia_irqs irqs[] = {
34 { 0, MAINSTONE_S0_CD_IRQ, "PCMCIA0 CD" },
35 { 1, MAINSTONE_S1_CD_IRQ, "PCMCIA1 CD" },
36 { 0, MAINSTONE_S0_STSCHG_IRQ, "PCMCIA0 STSCHG" },
37 { 1, MAINSTONE_S1_STSCHG_IRQ, "PCMCIA1 STSCHG" },
38};
39
40static int mst_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
41{
42 /*
43 * Setup default state of GPIO outputs
44 * before we enable them as outputs.
45 */
46
47 skt->socket.pci_irq = (skt->nr == 0) ? MAINSTONE_S0_IRQ : MAINSTONE_S1_IRQ;
48 return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
49}
50
51static void mst_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
52{
53 soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
54}
55
56static unsigned long mst_pcmcia_status[2];
57
58static void mst_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
59 struct pcmcia_state *state)
60{
61 unsigned long status, flip;
62
63 status = (skt->nr == 0) ? MST_PCMCIA0 : MST_PCMCIA1;
64 flip = (status ^ mst_pcmcia_status[skt->nr]) & MST_PCMCIA_nSTSCHG_BVD1;
65
66 /*
67 * Workaround for STSCHG which can't be deasserted:
68 * We therefore disable/enable corresponding IRQs
69 * as needed to avoid IRQ locks.
70 */
71 if (flip) {
72 mst_pcmcia_status[skt->nr] = status;
73 if (status & MST_PCMCIA_nSTSCHG_BVD1)
74 enable_irq( (skt->nr == 0) ? MAINSTONE_S0_STSCHG_IRQ
75 : MAINSTONE_S1_STSCHG_IRQ );
76 else
77 disable_irq( (skt->nr == 0) ? MAINSTONE_S0_STSCHG_IRQ
78 : MAINSTONE_S1_STSCHG_IRQ );
79 }
80
81 state->detect = (status & MST_PCMCIA_nCD) ? 0 : 1;
82 state->ready = (status & MST_PCMCIA_nIRQ) ? 1 : 0;
83 state->bvd1 = (status & MST_PCMCIA_nSTSCHG_BVD1) ? 1 : 0;
84 state->bvd2 = (status & MST_PCMCIA_nSPKR_BVD2) ? 1 : 0;
85 state->vs_3v = (status & MST_PCMCIA_nVS1) ? 0 : 1;
86 state->vs_Xv = (status & MST_PCMCIA_nVS2) ? 0 : 1;
87 state->wrprot = 0; /* not available */
88}
89
90static int mst_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
91 const socket_state_t *state)
92{
93 unsigned long power = 0;
94 int ret = 0;
95
96 switch (state->Vcc) {
97 case 0: power |= MST_PCMCIA_PWR_VCC_0; break;
98 case 33: power |= MST_PCMCIA_PWR_VCC_33; break;
99 case 50: power |= MST_PCMCIA_PWR_VCC_50; break;
100 default:
101 printk(KERN_ERR "%s(): bad Vcc %u\n",
102 __func__, state->Vcc);
103 ret = -1;
104 }
105
106 switch (state->Vpp) {
107 case 0: power |= MST_PCMCIA_PWR_VPP_0; break;
108 case 120: power |= MST_PCMCIA_PWR_VPP_120; break;
109 default:
110 if(state->Vpp == state->Vcc) {
111 power |= MST_PCMCIA_PWR_VPP_VCC;
112 } else {
113 printk(KERN_ERR "%s(): bad Vpp %u\n",
114 __func__, state->Vpp);
115 ret = -1;
116 }
117 }
118
119 if (state->flags & SS_RESET)
120 power |= MST_PCMCIA_RESET;
121
122 switch (skt->nr) {
123 case 0: MST_PCMCIA0 = power; break;
124 case 1: MST_PCMCIA1 = power; break;
125 default: ret = -1;
126 }
127
128 return ret;
129}
130
131static struct pcmcia_low_level mst_pcmcia_ops __initdata = {
132 .owner = THIS_MODULE,
133 .hw_init = mst_pcmcia_hw_init,
134 .hw_shutdown = mst_pcmcia_hw_shutdown,
135 .socket_state = mst_pcmcia_socket_state,
136 .configure_socket = mst_pcmcia_configure_socket,
137 .nr = 2,
138};
139
140static struct platform_device *mst_pcmcia_device;
141
142static int __init mst_pcmcia_init(void)
143{
144 int ret;
145
146 if (!machine_is_mainstone())
147 return -ENODEV;
148
149 mst_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
150 if (!mst_pcmcia_device)
151 return -ENOMEM;
152
153 ret = platform_device_add_data(mst_pcmcia_device, &mst_pcmcia_ops,
154 sizeof(mst_pcmcia_ops));
155 if (ret == 0)
156 ret = platform_device_add(mst_pcmcia_device);
157
158 if (ret)
159 platform_device_put(mst_pcmcia_device);
160
161 return ret;
162}
163
164static void __exit mst_pcmcia_exit(void)
165{
166 platform_device_unregister(mst_pcmcia_device);
167}
168
169fs_initcall(mst_pcmcia_init);
170module_exit(mst_pcmcia_exit);
171
172MODULE_LICENSE("GPL");
173MODULE_ALIAS("platform:pxa2xx-pcmcia");
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * linux/drivers/pcmcia/pxa2xx_mainstone.c
4 *
5 * Mainstone PCMCIA specific routines.
6 *
7 * Created: May 12, 2004
8 * Author: Nicolas Pitre
9 * Copyright: MontaVista Software Inc.
10 */
11#include <linux/gpio/consumer.h>
12#include <linux/module.h>
13#include <linux/init.h>
14#include <linux/interrupt.h>
15#include <linux/kernel.h>
16#include <linux/errno.h>
17#include <linux/platform_device.h>
18
19#include <pcmcia/ss.h>
20
21#include <asm/mach-types.h>
22
23#include "soc_common.h"
24#include "max1600.h"
25
26static int mst_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
27{
28 struct device *dev = skt->socket.dev.parent;
29 struct max1600 *m;
30 int ret;
31
32 skt->stat[SOC_STAT_CD].name = skt->nr ? "bdetect" : "adetect";
33 skt->stat[SOC_STAT_BVD1].name = skt->nr ? "bbvd1" : "abvd1";
34 skt->stat[SOC_STAT_BVD2].name = skt->nr ? "bbvd2" : "abvd2";
35 skt->stat[SOC_STAT_RDY].name = skt->nr ? "bready" : "aready";
36 skt->stat[SOC_STAT_VS1].name = skt->nr ? "bvs1" : "avs1";
37 skt->stat[SOC_STAT_VS2].name = skt->nr ? "bvs2" : "avs2";
38
39 skt->gpio_reset = devm_gpiod_get(dev, skt->nr ? "breset" : "areset",
40 GPIOD_OUT_HIGH);
41 if (IS_ERR(skt->gpio_reset))
42 return PTR_ERR(skt->gpio_reset);
43
44 ret = max1600_init(dev, &m, skt->nr ? MAX1600_CHAN_B : MAX1600_CHAN_A,
45 MAX1600_CODE_HIGH);
46 if (ret)
47 return ret;
48
49 skt->driver_data = m;
50
51 return soc_pcmcia_request_gpiods(skt);
52}
53
54static unsigned int mst_pcmcia_bvd1_status[2];
55
56static void mst_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
57 struct pcmcia_state *state)
58{
59 unsigned int flip = mst_pcmcia_bvd1_status[skt->nr] ^ state->bvd1;
60
61 /*
62 * Workaround for STSCHG which can't be deasserted:
63 * We therefore disable/enable corresponding IRQs
64 * as needed to avoid IRQ locks.
65 */
66 if (flip) {
67 mst_pcmcia_bvd1_status[skt->nr] = state->bvd1;
68 if (state->bvd1)
69 enable_irq(skt->stat[SOC_STAT_BVD1].irq);
70 else
71 disable_irq(skt->stat[SOC_STAT_BVD2].irq);
72 }
73}
74
75static int mst_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
76 const socket_state_t *state)
77{
78 return max1600_configure(skt->driver_data, state->Vcc, state->Vpp);
79}
80
81static struct pcmcia_low_level mst_pcmcia_ops __initdata = {
82 .owner = THIS_MODULE,
83 .hw_init = mst_pcmcia_hw_init,
84 .socket_state = mst_pcmcia_socket_state,
85 .configure_socket = mst_pcmcia_configure_socket,
86 .nr = 2,
87};
88
89static struct platform_device *mst_pcmcia_device;
90
91static int __init mst_pcmcia_init(void)
92{
93 int ret;
94
95 if (!machine_is_mainstone())
96 return -ENODEV;
97
98 mst_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
99 if (!mst_pcmcia_device)
100 return -ENOMEM;
101
102 ret = platform_device_add_data(mst_pcmcia_device, &mst_pcmcia_ops,
103 sizeof(mst_pcmcia_ops));
104 if (ret == 0)
105 ret = platform_device_add(mst_pcmcia_device);
106
107 if (ret)
108 platform_device_put(mst_pcmcia_device);
109
110 return ret;
111}
112
113static void __exit mst_pcmcia_exit(void)
114{
115 platform_device_unregister(mst_pcmcia_device);
116}
117
118fs_initcall(mst_pcmcia_init);
119module_exit(mst_pcmcia_exit);
120
121MODULE_LICENSE("GPL");
122MODULE_ALIAS("platform:pxa2xx-pcmcia");