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.
9 #ifndef _ASM_ARCH_PCMCIA
10 #define _ASM_ARCH_PCMCIA
12 /* include the world */
13 #include <linux/clk.h>
14 #include <linux/cpufreq.h>
15 #include <pcmcia/ss.h>
16 #include <pcmcia/cistpl.h>
20 struct pcmcia_low_level
;
23 * This structure encapsulates per-socket state which we might need to
24 * use when responding to a Card Services query of some kind.
26 struct soc_pcmcia_socket
{
27 struct pcmcia_socket socket
;
30 * Info from low level handler
38 const struct pcmcia_low_level
*ops
;
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
;
58 #define SOC_STAT_CD 0 /* Card detect */
59 #define SOC_STAT_BVD1 1 /* BATDEAD / IOSTSCHG */
60 #define SOC_STAT_BVD2 2 /* BATWARN / IOSPKR */
61 #define SOC_STAT_RDY 3 /* Ready / Interrupt */
63 unsigned int irq_state
;
65 struct timer_list poll_timer
;
66 struct list_head node
;
72 struct soc_pcmcia_socket skt
[0];
85 struct pcmcia_low_level
{
88 /* first socket in system */
93 int (*hw_init
)(struct soc_pcmcia_socket
*);
94 void (*hw_shutdown
)(struct soc_pcmcia_socket
*);
96 void (*socket_state
)(struct soc_pcmcia_socket
*, struct pcmcia_state
*);
97 int (*configure_socket
)(struct soc_pcmcia_socket
*, const socket_state_t
*);
100 * Enable card status IRQs on (re-)initialisation. This can
101 * be called at initialisation, power management event, or
104 void (*socket_init
)(struct soc_pcmcia_socket
*);
107 * Disable card status IRQs and PCMCIA bus on suspend.
109 void (*socket_suspend
)(struct soc_pcmcia_socket
*);
112 * Hardware specific timing routines.
113 * If provided, the get_timing routine overrides the SOC default.
115 unsigned int (*get_timing
)(struct soc_pcmcia_socket
*, unsigned int, unsigned int);
116 int (*set_timing
)(struct soc_pcmcia_socket
*);
117 int (*show_timing
)(struct soc_pcmcia_socket
*, char *);
119 #ifdef CONFIG_CPU_FREQ
123 int (*frequency_change
)(struct soc_pcmcia_socket
*, unsigned long, struct cpufreq_freqs
*);
128 struct soc_pcmcia_timing
{
134 extern void soc_common_pcmcia_get_timing(struct soc_pcmcia_socket
*, struct soc_pcmcia_timing
*);
136 void soc_pcmcia_init_one(struct soc_pcmcia_socket
*skt
,
137 struct pcmcia_low_level
*ops
, struct device
*dev
);
138 void soc_pcmcia_remove_one(struct soc_pcmcia_socket
*skt
);
139 int soc_pcmcia_add_one(struct soc_pcmcia_socket
*skt
);
142 #ifdef CONFIG_PCMCIA_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)
151 #define debug(skt, lvl, fmt, arg...) do { } while (0)
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
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