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/cistpl.h>
  18 #include "cs_internal.h"
  19
  20
  21 struct device;
  22 struct pcmcia_low_level;
  23
  24 /*
  25  * This structure encapsulates per-socket state which we might need to
  26  * use when responding to a Card Services query of some kind.
  27  */
  28 struct soc_pcmcia_socket {
  29         struct pcmcia_socket    socket;
  30
  31         /*
  32          * Info from low level handler
  33          */
  34         struct device           *dev;
  35         unsigned int            nr;
  36         unsigned int            irq;
  37
  38         /*
  39          * Core PCMCIA state
  40          */
  41         struct pcmcia_low_level *ops;
  42
  43         unsigned int            status;
  44         socket_state_t          cs_state;
  45
  46         unsigned short          spd_io[MAX_IO_WIN];
  47         unsigned short          spd_mem[MAX_WIN];
  48         unsigned short          spd_attr[MAX_WIN];
  49
  50         struct resource         res_skt;
  51         struct resource         res_io;
  52         struct resource         res_mem;
  53         struct resource         res_attr;
  54         void __iomem            *virt_io;
  55
  56         unsigned int            irq_state;
  57
  58         struct timer_list       poll_timer;
  59         struct list_head        node;
  60 };
  61
  62 struct pcmcia_state {
  63   unsigned detect: 1,
  64             ready: 1,
  65              bvd1: 1,
  66              bvd2: 1,
  67            wrprot: 1,
  68             vs_3v: 1,
  69             vs_Xv: 1;
  70 };
  71
  72 struct pcmcia_low_level {
  73         struct module *owner;
  74
  75         /* first socket in system */
  76         int first;
  77         /* nr of sockets */
  78         int nr;
  79
  80         int (*hw_init)(struct soc_pcmcia_socket *);
  81         void (*hw_shutdown)(struct soc_pcmcia_socket *);
  82
  83         void (*socket_state)(struct soc_pcmcia_socket *, struct pcmcia_state *);
  84         int (*configure_socket)(struct soc_pcmcia_socket *, const socket_state_t *);
  85
  86         /*
  87          * Enable card status IRQs on (re-)initialisation.  This can
  88          * be called at initialisation, power management event, or
  89          * pcmcia event.
  90          */
  91         void (*socket_init)(struct soc_pcmcia_socket *);
  92
  93         /*
  94          * Disable card status IRQs and PCMCIA bus on suspend.
  95          */
  96         void (*socket_suspend)(struct soc_pcmcia_socket *);
  97
  98         /*
  99          * Hardware specific timing routines.
 100          * If provided, the get_timing routine overrides the SOC default.
 101          */
 102         unsigned int (*get_timing)(struct soc_pcmcia_socket *, unsigned int, unsigned int);
 103         int (*set_timing)(struct soc_pcmcia_socket *);
 104         int (*show_timing)(struct soc_pcmcia_socket *, char *);
 105
 106 #ifdef CONFIG_CPU_FREQ
 107         /*
 108          * CPUFREQ support.
 109          */
 110         int (*frequency_change)(struct soc_pcmcia_socket *, unsigned long, struct cpufreq_freqs *);
 111 #endif
 112 };
 113
 114
 115 struct pcmcia_irqs {
 116         int sock;
 117         int irq;
 118         const char *str;
 119 };
 120
 121 struct soc_pcmcia_timing {
 122         unsigned short io;
 123         unsigned short mem;
 124         unsigned short attr;
 125 };
 126
 127 extern int soc_pcmcia_request_irqs(struct soc_pcmcia_socket *skt, struct pcmcia_irqs *irqs, int nr);
 128 extern void soc_pcmcia_free_irqs(struct soc_pcmcia_socket *skt, struct pcmcia_irqs *irqs, int nr);
 129 extern void soc_pcmcia_disable_irqs(struct soc_pcmcia_socket *skt, struct pcmcia_irqs *irqs, int nr);
 130 extern void soc_pcmcia_enable_irqs(struct soc_pcmcia_socket *skt, struct pcmcia_irqs *irqs, int nr);
 131 extern void soc_common_pcmcia_get_timing(struct soc_pcmcia_socket *, struct soc_pcmcia_timing *);
 132
 133
 134 extern struct list_head soc_pcmcia_sockets;
 135
 136 extern int soc_common_drv_pcmcia_probe(struct device *dev, struct pcmcia_low_level *ops, int first, int nr);
 137 extern int soc_common_drv_pcmcia_remove(struct device *dev);
 138
 139
 140 #ifdef DEBUG
 141
 142 extern void soc_pcmcia_debug(struct soc_pcmcia_socket *skt, const char *func,
 143                              int lvl, const char *fmt, ...);
 144
 145 #define debug(skt, lvl, fmt, arg...) \
 146         soc_pcmcia_debug(skt, __func__, lvl, fmt , ## arg)
 147
 148 #else
 149 #define debug(skt, lvl, fmt, arg...) do { } while (0)
 150 #endif
 151
 152
 153 /*
 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).
 163  *
 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.
 169  */
 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)
 174
 175 /*
 176  * The socket driver actually works nicely in interrupt-driven form,
 177  * so the (relatively infrequent) polling is "just to be sure."
 178  */
 179 #define SOC_PCMCIA_POLL_PERIOD    (2*HZ)
 180
 181
 182 /* I/O pins replacing memory pins
 183  * (PCMCIA System Architecture, 2nd ed., by Don Anderson, p.75)
 184  *
 185  * These signals change meaning when going from memory-only to
 186  * memory-or-I/O interface:
 187  */
 188 #define iostschg bvd1
 189 #define iospkr   bvd2
 190
 191 #endif