Root/drivers/pcmcia/soc_common.h

1/*
2 * linux/drivers/pcmcia/soc_common.h
3 *
4 * Copyright (C) 2000 John G Dorsey <john+@cs.cmu.edu>
5 *
6 * This file contains definitions for the PCMCIA support code common to
7 * integrated SOCs like the SA-11x0 and PXA2xx microprocessors.
8 */
9#ifndef _ASM_ARCH_PCMCIA
10#define _ASM_ARCH_PCMCIA
11
12/* include the world */
13#include <linux/cpufreq.h>
14#include <pcmcia/cs_types.h>
15#include <pcmcia/cs.h>
16#include <pcmcia/ss.h>
17#include <pcmcia/cistpl.h>
18
19
20struct device;
21struct pcmcia_low_level;
22
23/*
24 * This structure encapsulates per-socket state which we might need to
25 * use when responding to a Card Services query of some kind.
26 */
27struct soc_pcmcia_socket {
28    struct pcmcia_socket socket;
29
30    /*
31     * Info from low level handler
32     */
33    unsigned int nr;
34
35    /*
36     * Core PCMCIA state
37     */
38    const struct pcmcia_low_level *ops;
39
40    unsigned int status;
41    socket_state_t cs_state;
42
43    unsigned short spd_io[MAX_IO_WIN];
44    unsigned short spd_mem[MAX_WIN];
45    unsigned short spd_attr[MAX_WIN];
46
47    struct resource res_skt;
48    struct resource res_io;
49    struct resource res_mem;
50    struct resource res_attr;
51    void __iomem *virt_io;
52
53    unsigned int irq_state;
54
55    struct timer_list poll_timer;
56    struct list_head node;
57};
58
59struct skt_dev_info {
60    int nskt;
61    struct soc_pcmcia_socket skt[0];
62};
63
64struct pcmcia_state {
65  unsigned detect: 1,
66            ready: 1,
67             bvd1: 1,
68             bvd2: 1,
69           wrprot: 1,
70            vs_3v: 1,
71            vs_Xv: 1;
72};
73
74struct pcmcia_low_level {
75    struct module *owner;
76
77    /* first socket in system */
78    int first;
79    /* nr of sockets */
80    int nr;
81
82    int (*hw_init)(struct soc_pcmcia_socket *);
83    void (*hw_shutdown)(struct soc_pcmcia_socket *);
84
85    void (*socket_state)(struct soc_pcmcia_socket *, struct pcmcia_state *);
86    int (*configure_socket)(struct soc_pcmcia_socket *, const socket_state_t *);
87
88    /*
89     * Enable card status IRQs on (re-)initialisation. This can
90     * be called at initialisation, power management event, or
91     * pcmcia event.
92     */
93    void (*socket_init)(struct soc_pcmcia_socket *);
94
95    /*
96     * Disable card status IRQs and PCMCIA bus on suspend.
97     */
98    void (*socket_suspend)(struct soc_pcmcia_socket *);
99
100    /*
101     * Hardware specific timing routines.
102     * If provided, the get_timing routine overrides the SOC default.
103     */
104    unsigned int (*get_timing)(struct soc_pcmcia_socket *, unsigned int, unsigned int);
105    int (*set_timing)(struct soc_pcmcia_socket *);
106    int (*show_timing)(struct soc_pcmcia_socket *, char *);
107
108#ifdef CONFIG_CPU_FREQ
109    /*
110     * CPUFREQ support.
111     */
112    int (*frequency_change)(struct soc_pcmcia_socket *, unsigned long, struct cpufreq_freqs *);
113#endif
114};
115
116
117struct pcmcia_irqs {
118    int sock;
119    int irq;
120    const char *str;
121};
122
123struct soc_pcmcia_timing {
124    unsigned short io;
125    unsigned short mem;
126    unsigned short attr;
127};
128
129extern int soc_pcmcia_request_irqs(struct soc_pcmcia_socket *skt, struct pcmcia_irqs *irqs, int nr);
130extern void soc_pcmcia_free_irqs(struct soc_pcmcia_socket *skt, struct pcmcia_irqs *irqs, int nr);
131extern void soc_pcmcia_disable_irqs(struct soc_pcmcia_socket *skt, struct pcmcia_irqs *irqs, int nr);
132extern void soc_pcmcia_enable_irqs(struct soc_pcmcia_socket *skt, struct pcmcia_irqs *irqs, int nr);
133extern void soc_common_pcmcia_get_timing(struct soc_pcmcia_socket *, struct soc_pcmcia_timing *);
134
135
136void soc_pcmcia_remove_one(struct soc_pcmcia_socket *skt);
137int soc_pcmcia_add_one(struct soc_pcmcia_socket *skt);
138
139
140#ifdef CONFIG_PCMCIA_DEBUG
141
142extern void soc_pcmcia_debug(struct soc_pcmcia_socket *skt, const char *func,
143                 int lvl, const char *fmt, ...);
144
145#define debug(skt, lvl, fmt, arg...) \
146    soc_pcmcia_debug(skt, __func__, lvl, fmt , ## arg)
147
148#else
149#define debug(skt, lvl, fmt, arg...) do { } while (0)
150#endif
151
152
153/*
154 * The PC Card Standard, Release 7, section 4.13.4, says that twIORD
155 * has a minimum value of 165ns. Section 4.13.5 says that twIOWR has
156 * a minimum value of 165ns, as well. Section 4.7.2 (describing
157 * common and attribute memory write timing) says that twWE has a
158 * minimum value of 150ns for a 250ns cycle time (for 5V operation;
159 * see section 4.7.4), or 300ns for a 600ns cycle time (for 3.3V
160 * operation, also section 4.7.4). Section 4.7.3 says that taOE
161 * has a maximum value of 150ns for a 300ns cycle time (for 5V
162 * operation), or 300ns for a 600ns cycle time (for 3.3V operation).
163 *
164 * When configuring memory maps, Card Services appears to adopt the policy
165 * that a memory access time of "0" means "use the default." The default
166 * PCMCIA I/O command width time is 165ns. The default PCMCIA 5V attribute
167 * and memory command width time is 150ns; the PCMCIA 3.3V attribute and
168 * memory command width time is 300ns.
169 */
170#define SOC_PCMCIA_IO_ACCESS (165)
171#define SOC_PCMCIA_5V_MEM_ACCESS (150)
172#define SOC_PCMCIA_3V_MEM_ACCESS (300)
173#define SOC_PCMCIA_ATTR_MEM_ACCESS (300)
174
175/*
176 * The socket driver actually works nicely in interrupt-driven form,
177 * so the (relatively infrequent) polling is "just to be sure."
178 */
179#define SOC_PCMCIA_POLL_PERIOD (2*HZ)
180
181
182/* I/O pins replacing memory pins
183 * (PCMCIA System Architecture, 2nd ed., by Don Anderson, p.75)
184 *
185 * These signals change meaning when going from memory-only to
186 * memory-or-I/O interface:
187 */
188#define iostschg bvd1
189#define iospkr bvd2
190
191#endif
192

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