Linux 2.6.33-rc6
[cris-mirror.git] / drivers / pcmcia / soc_common.h
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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/cistpl.h>
20 struct device;
21 struct pcmcia_low_level;
24 * This structure encapsulates per-socket state which we might need to
25 * use when responding to a Card Services query of some kind.
27 struct soc_pcmcia_socket {
28 struct pcmcia_socket socket;
31 * Info from low level handler
33 unsigned int nr;
36 * Core PCMCIA state
38 const struct pcmcia_low_level *ops;
40 unsigned int status;
41 socket_state_t cs_state;
43 unsigned short spd_io[MAX_IO_WIN];
44 unsigned short spd_mem[MAX_WIN];
45 unsigned short spd_attr[MAX_WIN];
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;
53 unsigned int irq_state;
55 struct timer_list poll_timer;
56 struct list_head node;
59 struct skt_dev_info {
60 int nskt;
61 struct soc_pcmcia_socket skt[0];
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;
74 struct pcmcia_low_level {
75 struct module *owner;
77 /* first socket in system */
78 int first;
79 /* nr of sockets */
80 int nr;
82 int (*hw_init)(struct soc_pcmcia_socket *);
83 void (*hw_shutdown)(struct soc_pcmcia_socket *);
85 void (*socket_state)(struct soc_pcmcia_socket *, struct pcmcia_state *);
86 int (*configure_socket)(struct soc_pcmcia_socket *, const socket_state_t *);
89 * Enable card status IRQs on (re-)initialisation. This can
90 * be called at initialisation, power management event, or
91 * pcmcia event.
93 void (*socket_init)(struct soc_pcmcia_socket *);
96 * Disable card status IRQs and PCMCIA bus on suspend.
98 void (*socket_suspend)(struct soc_pcmcia_socket *);
101 * Hardware specific timing routines.
102 * If provided, the get_timing routine overrides the SOC default.
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 *);
108 #ifdef CONFIG_CPU_FREQ
110 * CPUFREQ support.
112 int (*frequency_change)(struct soc_pcmcia_socket *, unsigned long, struct cpufreq_freqs *);
113 #endif
117 struct pcmcia_irqs {
118 int sock;
119 int irq;
120 const char *str;
123 struct soc_pcmcia_timing {
124 unsigned short io;
125 unsigned short mem;
126 unsigned short attr;
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 *);
136 void soc_pcmcia_remove_one(struct soc_pcmcia_socket *skt);
137 int soc_pcmcia_add_one(struct soc_pcmcia_socket *skt);
140 #ifdef CONFIG_PCMCIA_DEBUG
142 extern void soc_pcmcia_debug(struct soc_pcmcia_socket *skt, const char *func,
143 int lvl, const char *fmt, ...);
145 #define debug(skt, lvl, fmt, arg...) \
146 soc_pcmcia_debug(skt, __func__, lvl, fmt , ## arg)
148 #else
149 #define debug(skt, lvl, fmt, arg...) do { } while (0)
150 #endif
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).
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.
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)
176 * The socket driver actually works nicely in interrupt-driven form,
177 * so the (relatively infrequent) polling is "just to be sure."
179 #define SOC_PCMCIA_POLL_PERIOD (2*HZ)
182 /* I/O pins replacing memory pins
183 * (PCMCIA System Architecture, 2nd ed., by Don Anderson, p.75)
185 * These signals change meaning when going from memory-only to
186 * memory-or-I/O interface:
188 #define iostschg bvd1
189 #define iospkr bvd2
191 #endif