pcmcia: CompactFlash driver for PA Semi Electra boards
[pv_ops_mirror.git] / drivers / pcmcia / soc_common.h
blob6f14126889b3457e6c8d7055e9994918e594b793
1 /*
2 * linux/drivers/pcmcia/soc_common.h
4 * Copyright (C) 2000 John G Dorsey <john+@cs.cmu.edu>
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
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/bulkmem.h>
18 #include <pcmcia/cistpl.h>
19 #include "cs_internal.h"
22 struct device;
23 struct pcmcia_low_level;
26 * This structure encapsulates per-socket state which we might need to
27 * use when responding to a Card Services query of some kind.
29 struct soc_pcmcia_socket {
30 struct pcmcia_socket socket;
33 * Info from low level handler
35 struct device *dev;
36 unsigned int nr;
37 unsigned int irq;
40 * Core PCMCIA state
42 struct pcmcia_low_level *ops;
44 unsigned int status;
45 socket_state_t cs_state;
47 unsigned short spd_io[MAX_IO_WIN];
48 unsigned short spd_mem[MAX_WIN];
49 unsigned short spd_attr[MAX_WIN];
51 struct resource res_skt;
52 struct resource res_io;
53 struct resource res_mem;
54 struct resource res_attr;
55 void __iomem *virt_io;
57 unsigned int irq_state;
59 struct timer_list poll_timer;
60 struct list_head node;
63 struct pcmcia_state {
64 unsigned detect: 1,
65 ready: 1,
66 bvd1: 1,
67 bvd2: 1,
68 wrprot: 1,
69 vs_3v: 1,
70 vs_Xv: 1;
73 struct pcmcia_low_level {
74 struct module *owner;
76 /* first socket in system */
77 int first;
78 /* nr of sockets */
79 int nr;
81 int (*hw_init)(struct soc_pcmcia_socket *);
82 void (*hw_shutdown)(struct soc_pcmcia_socket *);
84 void (*socket_state)(struct soc_pcmcia_socket *, struct pcmcia_state *);
85 int (*configure_socket)(struct soc_pcmcia_socket *, const socket_state_t *);
88 * Enable card status IRQs on (re-)initialisation. This can
89 * be called at initialisation, power management event, or
90 * pcmcia event.
92 void (*socket_init)(struct soc_pcmcia_socket *);
95 * Disable card status IRQs and PCMCIA bus on suspend.
97 void (*socket_suspend)(struct soc_pcmcia_socket *);
100 * Hardware specific timing routines.
101 * If provided, the get_timing routine overrides the SOC default.
103 unsigned int (*get_timing)(struct soc_pcmcia_socket *, unsigned int, unsigned int);
104 int (*set_timing)(struct soc_pcmcia_socket *);
105 int (*show_timing)(struct soc_pcmcia_socket *, char *);
107 #ifdef CONFIG_CPU_FREQ
109 * CPUFREQ support.
111 int (*frequency_change)(struct soc_pcmcia_socket *, unsigned long, struct cpufreq_freqs *);
112 #endif
116 struct pcmcia_irqs {
117 int sock;
118 int irq;
119 const char *str;
122 struct soc_pcmcia_timing {
123 unsigned short io;
124 unsigned short mem;
125 unsigned short attr;
128 extern int soc_pcmcia_request_irqs(struct soc_pcmcia_socket *skt, struct pcmcia_irqs *irqs, int nr);
129 extern void soc_pcmcia_free_irqs(struct soc_pcmcia_socket *skt, struct pcmcia_irqs *irqs, int nr);
130 extern void soc_pcmcia_disable_irqs(struct soc_pcmcia_socket *skt, struct pcmcia_irqs *irqs, int nr);
131 extern void soc_pcmcia_enable_irqs(struct soc_pcmcia_socket *skt, struct pcmcia_irqs *irqs, int nr);
132 extern void soc_common_pcmcia_get_timing(struct soc_pcmcia_socket *, struct soc_pcmcia_timing *);
135 extern struct list_head soc_pcmcia_sockets;
136 extern struct semaphore soc_pcmcia_sockets_lock;
138 extern int soc_common_drv_pcmcia_probe(struct device *dev, struct pcmcia_low_level *ops, int first, int nr);
139 extern int soc_common_drv_pcmcia_remove(struct device *dev);
142 #ifdef DEBUG
144 extern void soc_pcmcia_debug(struct soc_pcmcia_socket *skt, const char *func,
145 int lvl, const char *fmt, ...);
147 #define debug(skt, lvl, fmt, arg...) \
148 soc_pcmcia_debug(skt, __func__, lvl, fmt , ## arg)
150 #else
151 #define debug(skt, lvl, fmt, arg...) do { } while (0)
152 #endif
156 * The PC Card Standard, Release 7, section 4.13.4, says that twIORD
157 * has a minimum value of 165ns. Section 4.13.5 says that twIOWR has
158 * a minimum value of 165ns, as well. Section 4.7.2 (describing
159 * common and attribute memory write timing) says that twWE has a
160 * minimum value of 150ns for a 250ns cycle time (for 5V operation;
161 * see section 4.7.4), or 300ns for a 600ns cycle time (for 3.3V
162 * operation, also section 4.7.4). Section 4.7.3 says that taOE
163 * has a maximum value of 150ns for a 300ns cycle time (for 5V
164 * operation), or 300ns for a 600ns cycle time (for 3.3V operation).
166 * When configuring memory maps, Card Services appears to adopt the policy
167 * that a memory access time of "0" means "use the default." The default
168 * PCMCIA I/O command width time is 165ns. The default PCMCIA 5V attribute
169 * and memory command width time is 150ns; the PCMCIA 3.3V attribute and
170 * memory command width time is 300ns.
172 #define SOC_PCMCIA_IO_ACCESS (165)
173 #define SOC_PCMCIA_5V_MEM_ACCESS (150)
174 #define SOC_PCMCIA_3V_MEM_ACCESS (300)
175 #define SOC_PCMCIA_ATTR_MEM_ACCESS (300)
178 * The socket driver actually works nicely in interrupt-driven form,
179 * so the (relatively infrequent) polling is "just to be sure."
181 #define SOC_PCMCIA_POLL_PERIOD (2*HZ)
184 /* I/O pins replacing memory pins
185 * (PCMCIA System Architecture, 2nd ed., by Don Anderson, p.75)
187 * These signals change meaning when going from memory-only to
188 * memory-or-I/O interface:
190 #define iostschg bvd1
191 #define iospkr bvd2
193 #endif