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
  19
  20 struct device;
  21 struct pcmcia_low_level;
  22
  23 /*
  24  * This structure encapsulates per-socket state which we might need to
  25  * use when responding to a Card Services query of some kind.
  26  */
  27 struct soc_pcmcia_socket {
  28         struct pcmcia_socket    socket;
  29
  30         /*
  31          * Info from low level handler
  32          */
  33         struct device           *dev;
  34         unsigned int            nr;
  35         unsigned int            irq;
  36
  37         /*
  38          * Core PCMCIA state
  39          */
  40         struct pcmcia_low_level *ops;
  41
  42         unsigned int            status;
  43         socket_state_t          cs_state;
  44
  45         unsigned short          spd_io[MAX_IO_WIN];
  46         unsigned short          spd_mem[MAX_WIN];
  47         unsigned short          spd_attr[MAX_WIN];
  48
  49         struct resource         res_skt;
  50         struct resource         res_io;
  51         struct resource         res_mem;
  52         struct resource         res_attr;
  53         void __iomem            *virt_io;
  54
  55         unsigned int            irq_state;
  56
  57         struct timer_list       poll_timer;
  58         struct list_head        node;
  59 };
  60
  61 struct skt_dev_info {
  62         int nskt;
  63         struct soc_pcmcia_socket skt[0];
  64 };
  65
  66 struct pcmcia_state {
  67   unsigned detect: 1,
  68             ready: 1,
  69              bvd1: 1,
  70              bvd2: 1,
  71            wrprot: 1,
  72             vs_3v: 1,
  73             vs_Xv: 1;
  74 };
  75
  76 struct pcmcia_low_level {
  77         struct module *owner;
  78
  79         /* first socket in system */
  80         int first;
  81         /* nr of sockets */
  82         int nr;
  83
  84         int (*hw_init)(struct soc_pcmcia_socket *);
  85         void (*hw_shutdown)(struct soc_pcmcia_socket *);
  86
  87         void (*socket_state)(struct soc_pcmcia_socket *, struct pcmcia_state *);
  88         int (*configure_socket)(struct soc_pcmcia_socket *, const socket_state_t *);
  89
  90         /*
  91          * Enable card status IRQs on (re-)initialisation.  This can
  92          * be called at initialisation, power management event, or
  93          * pcmcia event.
  94          */
  95         void (*socket_init)(struct soc_pcmcia_socket *);
  96
  97         /*
  98          * Disable card status IRQs and PCMCIA bus on suspend.
  99          */
 100         void (*socket_suspend)(struct soc_pcmcia_socket *);
 101
 102         /*
 103          * Hardware specific timing routines.
 104          * If provided, the get_timing routine overrides the SOC default.
 105          */
 106         unsigned int (*get_timing)(struct soc_pcmcia_socket *, unsigned int, unsigned int);
 107         int (*set_timing)(struct soc_pcmcia_socket *);
 108         int (*show_timing)(struct soc_pcmcia_socket *, char *);
 109
 110 #ifdef CONFIG_CPU_FREQ
 111         /*
 112          * CPUFREQ support.
 113          */
 114         int (*frequency_change)(struct soc_pcmcia_socket *, unsigned long, struct cpufreq_freqs *);
 115 #endif
 116 };
 117
 118
 119 struct pcmcia_irqs {
 120         int sock;
 121         int irq;
 122         const char *str;
 123 };
 124
 125 struct soc_pcmcia_timing {
 126         unsigned short io;
 127         unsigned short mem;
 128         unsigned short attr;
 129 };
 130
 131 extern int soc_pcmcia_request_irqs(struct soc_pcmcia_socket *skt, struct pcmcia_irqs *irqs, int nr);
 132 extern void soc_pcmcia_free_irqs(struct soc_pcmcia_socket *skt, struct pcmcia_irqs *irqs, int nr);
 133 extern void soc_pcmcia_disable_irqs(struct soc_pcmcia_socket *skt, struct pcmcia_irqs *irqs, int nr);
 134 extern void soc_pcmcia_enable_irqs(struct soc_pcmcia_socket *skt, struct pcmcia_irqs *irqs, int nr);
 135 extern void soc_common_pcmcia_get_timing(struct soc_pcmcia_socket *, struct soc_pcmcia_timing *);
 136
 137
 138 extern struct list_head soc_pcmcia_sockets;
 139
 140 extern int soc_common_drv_pcmcia_probe(struct device *dev, struct pcmcia_low_level *ops, struct skt_dev_info *sinfo);
 141 extern int soc_common_drv_pcmcia_remove(struct device *dev);
 142
 143
 144 #ifdef CONFIG_PCMCIA_DEBUG
 145
 146 extern void soc_pcmcia_debug(struct soc_pcmcia_socket *skt, const char *func,
 147                              int lvl, const char *fmt, ...);
 148
 149 #define debug(skt, lvl, fmt, arg...) \
 150         soc_pcmcia_debug(skt, __func__, lvl, fmt , ## arg)
 151
 152 #else
 153 #define debug(skt, lvl, fmt, arg...) do { } while (0)
 154 #endif
 155
 156
 157 /*
 158  * The PC Card Standard, Release 7, section 4.13.4, says that twIORD
 159  * has a minimum value of 165ns. Section 4.13.5 says that twIOWR has
 160  * a minimum value of 165ns, as well. Section 4.7.2 (describing
 161  * common and attribute memory write timing) says that twWE has a
 162  * minimum value of 150ns for a 250ns cycle time (for 5V operation;
 163  * see section 4.7.4), or 300ns for a 600ns cycle time (for 3.3V
 164  * operation, also section 4.7.4). Section 4.7.3 says that taOE
 165  * has a maximum value of 150ns for a 300ns cycle time (for 5V
 166  * operation), or 300ns for a 600ns cycle time (for 3.3V operation).
 167  *
 168  * When configuring memory maps, Card Services appears to adopt the policy
 169  * that a memory access time of "0" means "use the default." The default
 170  * PCMCIA I/O command width time is 165ns. The default PCMCIA 5V attribute
 171  * and memory command width time is 150ns; the PCMCIA 3.3V attribute and
 172  * memory command width time is 300ns.
 173  */
 174 #define SOC_PCMCIA_IO_ACCESS            (165)
 175 #define SOC_PCMCIA_5V_MEM_ACCESS        (150)
 176 #define SOC_PCMCIA_3V_MEM_ACCESS        (300)
 177 #define SOC_PCMCIA_ATTR_MEM_ACCESS      (300)
 178
 179 /*
 180  * The socket driver actually works nicely in interrupt-driven form,
 181  * so the (relatively infrequent) polling is "just to be sure."
 182  */
 183 #define SOC_PCMCIA_POLL_PERIOD    (2*HZ)
 184
 185
 186 /* I/O pins replacing memory pins
 187  * (PCMCIA System Architecture, 2nd ed., by Don Anderson, p.75)
 188  *
 189  * These signals change meaning when going from memory-only to
 190  * memory-or-I/O interface:
 191  */
 192 #define iostschg bvd1
 193 #define iospkr   bvd2
 194
 195 #endif