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/version.h>
15 #include <pcmcia/cs_types.h>
16 #include <pcmcia/cs.h>
17 #include <pcmcia/ss.h>
18 #include <pcmcia/bulkmem.h>
19 #include <pcmcia/cistpl.h>
20 #include "cs_internal.h"
21
22
23 struct device;
24 struct pcmcia_low_level;
25
26 /*
27 * This structure encapsulates per-socket state which we might need to
28 * use when responding to a Card Services query of some kind.
29 */
30 struct soc_pcmcia_socket {
31 struct pcmcia_socket socket;
32
33 /*
34 * Info from low level handler
35 */
36 struct device *dev;
37 unsigned int nr;
38 unsigned int irq;
39
40 /*
41 * Core PCMCIA state
42 */
43 struct pcmcia_low_level *ops;
44
45 unsigned int status;
46 socket_state_t cs_state;
47
48 unsigned short spd_io[MAX_IO_WIN];
49 unsigned short spd_mem[MAX_WIN];
50 unsigned short spd_attr[MAX_WIN];
51
52 struct resource res_skt;
53 struct resource res_io;
54 struct resource res_mem;
55 struct resource res_attr;
56 void __iomem *virt_io;
57
58 unsigned int irq_state;
59
60 struct timer_list poll_timer;
61 struct list_head node;
62 };
63
64 struct 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
74 struct 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
117 struct pcmcia_irqs {
118 int sock;
119 int irq;
120 const char *str;
121 };
122
123 struct soc_pcmcia_timing {
124 unsigned short io;
125 unsigned short mem;
126 unsigned short attr;
127 };
128
129 extern int soc_pcmcia_request_irqs(struct soc_pcmcia_socket *skt, struct pcmcia_irqs *irqs, int nr);
130 extern void soc_pcmcia_free_irqs(struct soc_pcmcia_socket *skt, struct pcmcia_irqs *irqs, int nr);
131 extern void soc_pcmcia_disable_irqs(struct soc_pcmcia_socket *skt, struct pcmcia_irqs *irqs, int nr);
132 extern void soc_pcmcia_enable_irqs(struct soc_pcmcia_socket *skt, struct pcmcia_irqs *irqs, int nr);
133 extern void soc_common_pcmcia_get_timing(struct soc_pcmcia_socket *, struct soc_pcmcia_timing *);
134
135
136 extern struct list_head soc_pcmcia_sockets;
137 extern struct semaphore soc_pcmcia_sockets_lock;
138
139 extern int soc_common_drv_pcmcia_probe(struct device *dev, struct pcmcia_low_level *ops, int first, int nr);
140 extern int soc_common_drv_pcmcia_remove(struct device *dev);
141
142
143 #ifdef DEBUG
144
145 extern void soc_pcmcia_debug(struct soc_pcmcia_socket *skt, const char *func,
146 int lvl, const char *fmt, ...);
147
148 #define debug(skt, lvl, fmt, arg...) \
149 soc_pcmcia_debug(skt, __func__, lvl, fmt , ## arg)
150
151 #else
152 #define debug(skt, lvl, fmt, arg...) do { } while (0)
153 #endif
154
155
156 /*
157 * The PC Card Standard, Release 7, section 4.13.4, says that twIORD
158 * has a minimum value of 165ns. Section 4.13.5 says that twIOWR has
159 * a minimum value of 165ns, as well. Section 4.7.2 (describing
160 * common and attribute memory write timing) says that twWE has a
161 * minimum value of 150ns for a 250ns cycle time (for 5V operation;
162 * see section 4.7.4), or 300ns for a 600ns cycle time (for 3.3V
163 * operation, also section 4.7.4). Section 4.7.3 says that taOE
164 * has a maximum value of 150ns for a 300ns cycle time (for 5V
165 * operation), or 300ns for a 600ns cycle time (for 3.3V operation).
166 *
167 * When configuring memory maps, Card Services appears to adopt the policy
168 * that a memory access time of "" means "use the default." The default
169 * PCMCIA I/O command width time is 165ns. The default PCMCIA 5V attribute
170 * and memory command width time is 150ns; the PCMCIA 3.3V attribute and
171 * memory command width time is 300ns.
172 */
173 #define SOC_PCMCIA_IO_ACCESS (165)
174 #define SOC_PCMCIA_5V_MEM_ACCESS (150)
175 #define SOC_PCMCIA_3V_MEM_ACCESS (300)
176 #define SOC_PCMCIA_ATTR_MEM_ACCESS (300)
177
178 /*
179 * The socket driver actually works nicely in interrupt-driven form,
180 * so the (relatively infrequent) polling is "just to be sure."
181 */
182 #define SOC_PCMCIA_POLL_PERIOD (2*HZ)
183
184
185 /* I/O pins replacing memory pins
186 * (PCMCIA System Architecture, 2nd ed., by Don Anderson, p.75)
187 *
188 * These signals change meaning when going from memory-only to
189 * memory-or-I/O interface:
190 */
191 #define iostschg bvd1
192 #define iospkr bvd2
193
194 #endif
195
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