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/bulkmem.h>
  18 #include <pcmcia/cistpl.h>
  19 #include "cs_internal.h"
  20
  21
  22 struct device;
  23 struct pcmcia_low_level;
  24
  25 /*
  26  * This structure encapsulates per-socket state which we might need to
  27  * use when responding to a Card Services query of some kind.
  28  */
  29 struct soc_pcmcia_socket {
  30         struct pcmcia_socket    socket;
  31
  32         /*
  33          * Info from low level handler
  34          */
  35         struct device           *dev;
  36         unsigned int            nr;
  37         unsigned int            irq;
  38
  39         /*
  40          * Core PCMCIA state
  41          */
  42         struct pcmcia_low_level *ops;
  43
  44         unsigned int            status;
  45         socket_state_t          cs_state;
  46
  47         unsigned short          spd_io[MAX_IO_WIN];
  48         unsigned short          spd_mem[MAX_WIN];
  49         unsigned short          spd_attr[MAX_WIN];
  50
  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;
  56
  57         unsigned int            irq_state;
  58
  59         struct timer_list       poll_timer;
  60         struct list_head        node;
  61 };
  62
  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;
  71 };
  72
  73 struct pcmcia_low_level {
  74         struct module *owner;
  75
  76         /* first socket in system */
  77         int first;
  78         /* nr of sockets */
  79         int nr;
  80
  81         int (*hw_init)(struct soc_pcmcia_socket *);
  82         void (*hw_shutdown)(struct soc_pcmcia_socket *);
  83
  84         void (*socket_state)(struct soc_pcmcia_socket *, struct pcmcia_state *);
  85         int (*configure_socket)(struct soc_pcmcia_socket *, const socket_state_t *);
  86
  87         /*
  88          * Enable card status IRQs on (re-)initialisation.  This can
  89          * be called at initialisation, power management event, or
  90          * pcmcia event.
  91          */
  92         void (*socket_init)(struct soc_pcmcia_socket *);
  93
  94         /*
  95          * Disable card status IRQs and PCMCIA bus on suspend.
  96          */
  97         void (*socket_suspend)(struct soc_pcmcia_socket *);
  98
  99         /*
 100          * Hardware specific timing routines.
 101          * If provided, the get_timing routine overrides the SOC default.
 102          */
 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 *);
 106
 107 #ifdef CONFIG_CPU_FREQ
 108         /*
 109          * CPUFREQ support.
 110          */
 111         int (*frequency_change)(struct soc_pcmcia_socket *, unsigned long, struct cpufreq_freqs *);
 112 #endif
 113 };
 114
 115
 116 struct pcmcia_irqs {
 117         int sock;
 118         int irq;
 119         const char *str;
 120 };
 121
 122 struct soc_pcmcia_timing {
 123         unsigned short io;
 124         unsigned short mem;
 125         unsigned short attr;
 126 };
 127
 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 *);
 133
 134
 135 extern struct list_head soc_pcmcia_sockets;
 136 extern struct semaphore soc_pcmcia_sockets_lock;
 137
 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);
 140
 141
 142 #ifdef DEBUG
 143
 144 extern void soc_pcmcia_debug(struct soc_pcmcia_socket *skt, const char *func,
 145                              int lvl, const char *fmt, ...);
 146
 147 #define debug(skt, lvl, fmt, arg...) \
 148         soc_pcmcia_debug(skt, __func__, lvl, fmt , ## arg)
 149
 150 #else
 151 #define debug(skt, lvl, fmt, arg...) do { } while (0)
 152 #endif
 153
 154
 155 /*
 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).
 165  *
 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.
 171  */
 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)
 176
 177 /*
 178  * The socket driver actually works nicely in interrupt-driven form,
 179  * so the (relatively infrequent) polling is "just to be sure."
 180  */
 181 #define SOC_PCMCIA_POLL_PERIOD    (2*HZ)
 182
 183
 184 /* I/O pins replacing memory pins
 185  * (PCMCIA System Architecture, 2nd ed., by Don Anderson, p.75)
 186  *
 187  * These signals change meaning when going from memory-only to
 188  * memory-or-I/O interface:
 189  */
 190 #define iostschg bvd1
 191 #define iospkr   bvd2
 192
 193 #endif