Root/drivers/pcmcia/sa1111_generic.c

1/*
2 * linux/drivers/pcmcia/sa1111_generic.c
3 *
4 * We implement the generic parts of a SA1111 PCMCIA driver. This
5 * basically means we handle everything except controlling the
6 * power. Power is machine specific...
7 */
8#include <linux/module.h>
9#include <linux/kernel.h>
10#include <linux/ioport.h>
11#include <linux/device.h>
12#include <linux/interrupt.h>
13#include <linux/init.h>
14#include <linux/io.h>
15#include <linux/slab.h>
16
17#include <pcmcia/ss.h>
18
19#include <mach/hardware.h>
20#include <asm/hardware/sa1111.h>
21#include <asm/irq.h>
22
23#include "sa1111_generic.h"
24
25#define IDX_IRQ_S0_READY_NINT (0)
26#define IDX_IRQ_S0_CD_VALID (1)
27#define IDX_IRQ_S0_BVD1_STSCHG (2)
28#define IDX_IRQ_S1_READY_NINT (3)
29#define IDX_IRQ_S1_CD_VALID (4)
30#define IDX_IRQ_S1_BVD1_STSCHG (5)
31
32static struct pcmcia_irqs irqs[] = {
33    { 0, NO_IRQ, "SA1111 PCMCIA card detect" },
34    { 0, NO_IRQ, "SA1111 PCMCIA BVD1" },
35    { 1, NO_IRQ, "SA1111 CF card detect" },
36    { 1, NO_IRQ, "SA1111 CF BVD1" },
37};
38
39static int sa1111_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
40{
41    return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
42}
43
44static void sa1111_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
45{
46    soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
47}
48
49void sa1111_pcmcia_socket_state(struct soc_pcmcia_socket *skt, struct pcmcia_state *state)
50{
51    struct sa1111_pcmcia_socket *s = to_skt(skt);
52    unsigned long status = sa1111_readl(s->dev->mapbase + SA1111_PCSR);
53
54    switch (skt->nr) {
55    case 0:
56        state->detect = status & PCSR_S0_DETECT ? 0 : 1;
57        state->ready = status & PCSR_S0_READY ? 1 : 0;
58        state->bvd1 = status & PCSR_S0_BVD1 ? 1 : 0;
59        state->bvd2 = status & PCSR_S0_BVD2 ? 1 : 0;
60        state->wrprot = status & PCSR_S0_WP ? 1 : 0;
61        state->vs_3v = status & PCSR_S0_VS1 ? 0 : 1;
62        state->vs_Xv = status & PCSR_S0_VS2 ? 0 : 1;
63        break;
64
65    case 1:
66        state->detect = status & PCSR_S1_DETECT ? 0 : 1;
67        state->ready = status & PCSR_S1_READY ? 1 : 0;
68        state->bvd1 = status & PCSR_S1_BVD1 ? 1 : 0;
69        state->bvd2 = status & PCSR_S1_BVD2 ? 1 : 0;
70        state->wrprot = status & PCSR_S1_WP ? 1 : 0;
71        state->vs_3v = status & PCSR_S1_VS1 ? 0 : 1;
72        state->vs_Xv = status & PCSR_S1_VS2 ? 0 : 1;
73        break;
74    }
75}
76
77int sa1111_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
78{
79    struct sa1111_pcmcia_socket *s = to_skt(skt);
80    unsigned int pccr_skt_mask, pccr_set_mask, val;
81    unsigned long flags;
82
83    switch (skt->nr) {
84    case 0:
85        pccr_skt_mask = PCCR_S0_RST|PCCR_S0_FLT|PCCR_S0_PWAITEN|PCCR_S0_PSE;
86        break;
87
88    case 1:
89        pccr_skt_mask = PCCR_S1_RST|PCCR_S1_FLT|PCCR_S1_PWAITEN|PCCR_S1_PSE;
90        break;
91
92    default:
93        return -1;
94    }
95
96    pccr_set_mask = 0;
97
98    if (state->Vcc != 0)
99        pccr_set_mask |= PCCR_S0_PWAITEN|PCCR_S1_PWAITEN;
100    if (state->Vcc == 50)
101        pccr_set_mask |= PCCR_S0_PSE|PCCR_S1_PSE;
102    if (state->flags & SS_RESET)
103        pccr_set_mask |= PCCR_S0_RST|PCCR_S1_RST;
104    if (state->flags & SS_OUTPUT_ENA)
105        pccr_set_mask |= PCCR_S0_FLT|PCCR_S1_FLT;
106
107    local_irq_save(flags);
108    val = sa1111_readl(s->dev->mapbase + SA1111_PCCR);
109    val &= ~pccr_skt_mask;
110    val |= pccr_set_mask & pccr_skt_mask;
111    sa1111_writel(val, s->dev->mapbase + SA1111_PCCR);
112    local_irq_restore(flags);
113
114    return 0;
115}
116
117void sa1111_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
118{
119    soc_pcmcia_enable_irqs(skt, irqs, ARRAY_SIZE(irqs));
120}
121
122static void sa1111_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
123{
124    soc_pcmcia_disable_irqs(skt, irqs, ARRAY_SIZE(irqs));
125}
126
127int sa1111_pcmcia_add(struct sa1111_dev *dev, struct pcmcia_low_level *ops,
128    int (*add)(struct soc_pcmcia_socket *))
129{
130    struct sa1111_pcmcia_socket *s;
131    int i, ret = 0;
132
133    ops->hw_init = sa1111_pcmcia_hw_init;
134    ops->hw_shutdown = sa1111_pcmcia_hw_shutdown;
135    ops->socket_state = sa1111_pcmcia_socket_state;
136    ops->socket_suspend = sa1111_pcmcia_socket_suspend;
137
138    for (i = 0; i < ops->nr; i++) {
139        s = kzalloc(sizeof(*s), GFP_KERNEL);
140        if (!s)
141            return -ENOMEM;
142
143        s->soc.nr = ops->first + i;
144        s->soc.ops = ops;
145        s->soc.socket.owner = ops->owner;
146        s->soc.socket.dev.parent = &dev->dev;
147        s->soc.socket.pci_irq = s->soc.nr ?
148                dev->irq[IDX_IRQ_S0_READY_NINT] :
149                dev->irq[IDX_IRQ_S1_READY_NINT];
150        s->dev = dev;
151
152        ret = add(&s->soc);
153        if (ret == 0) {
154            s->next = dev_get_drvdata(&dev->dev);
155            dev_set_drvdata(&dev->dev, s);
156        } else
157            kfree(s);
158    }
159
160    return ret;
161}
162
163static int pcmcia_probe(struct sa1111_dev *dev)
164{
165    void __iomem *base;
166
167    dev_set_drvdata(&dev->dev, NULL);
168
169    if (!request_mem_region(dev->res.start, 512,
170                SA1111_DRIVER_NAME(dev)))
171        return -EBUSY;
172
173    base = dev->mapbase;
174
175    /* Initialize PCMCIA IRQs */
176    irqs[0].irq = dev->irq[IDX_IRQ_S0_CD_VALID];
177    irqs[1].irq = dev->irq[IDX_IRQ_S0_BVD1_STSCHG];
178    irqs[2].irq = dev->irq[IDX_IRQ_S1_CD_VALID];
179    irqs[3].irq = dev->irq[IDX_IRQ_S1_BVD1_STSCHG];
180
181    /*
182     * Initialise the suspend state.
183     */
184    sa1111_writel(PCSSR_S0_SLEEP | PCSSR_S1_SLEEP, base + SA1111_PCSSR);
185    sa1111_writel(PCCR_S0_FLT | PCCR_S1_FLT, base + SA1111_PCCR);
186
187#ifdef CONFIG_SA1100_BADGE4
188    pcmcia_badge4_init(&dev->dev);
189#endif
190#ifdef CONFIG_SA1100_JORNADA720
191    pcmcia_jornada720_init(&dev->dev);
192#endif
193#ifdef CONFIG_ARCH_LUBBOCK
194    pcmcia_lubbock_init(dev);
195#endif
196#ifdef CONFIG_ASSABET_NEPONSET
197    pcmcia_neponset_init(dev);
198#endif
199    return 0;
200}
201
202static int __devexit pcmcia_remove(struct sa1111_dev *dev)
203{
204    struct sa1111_pcmcia_socket *next, *s = dev_get_drvdata(&dev->dev);
205
206    dev_set_drvdata(&dev->dev, NULL);
207
208    for (; next = s->next, s; s = next) {
209        soc_pcmcia_remove_one(&s->soc);
210        kfree(s);
211    }
212
213    release_mem_region(dev->res.start, 512);
214    return 0;
215}
216
217static struct sa1111_driver pcmcia_driver = {
218    .drv = {
219        .name = "sa1111-pcmcia",
220    },
221    .devid = SA1111_DEVID_PCMCIA,
222    .probe = pcmcia_probe,
223    .remove = __devexit_p(pcmcia_remove),
224};
225
226static int __init sa1111_drv_pcmcia_init(void)
227{
228    return sa1111_driver_register(&pcmcia_driver);
229}
230
231static void __exit sa1111_drv_pcmcia_exit(void)
232{
233    sa1111_driver_unregister(&pcmcia_driver);
234}
235
236fs_initcall(sa1111_drv_pcmcia_init);
237module_exit(sa1111_drv_pcmcia_exit);
238
239MODULE_DESCRIPTION("SA1111 PCMCIA card socket driver");
240MODULE_LICENSE("GPL");
241

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