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/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 "0" 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