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/clk.h>
  14 #include <linux/cpufreq.h>
  15 #include <pcmcia/ss.h>
  16 #include <pcmcia/cistpl.h>
  17
  18
  19 struct device;
  20 struct gpio_desc;
  21 struct pcmcia_low_level;
  22 struct regulator;
  23
  24 struct soc_pcmcia_regulator {
  25         struct regulator        *reg;
  26         bool                    on;
  27 };
  28
  29 /*
  30  * This structure encapsulates per-socket state which we might need to
  31  * use when responding to a Card Services query of some kind.
  32  */
  33 struct soc_pcmcia_socket {
  34         struct pcmcia_socket    socket;
  35
  36         /*
  37          * Info from low level handler
  38          */
  39         unsigned int            nr;
  40         struct clk              *clk;
  41
  42         /*
  43          * Core PCMCIA state
  44          */
  45         const struct pcmcia_low_level *ops;
  46
  47         unsigned int            status;
  48         socket_state_t          cs_state;
  49
  50         unsigned short          spd_io[MAX_IO_WIN];
  51         unsigned short          spd_mem[MAX_WIN];
  52         unsigned short          spd_attr[MAX_WIN];
  53
  54         struct resource         res_skt;
  55         struct resource         res_io;
  56         struct resource         res_mem;
  57         struct resource         res_attr;
  58         void __iomem            *virt_io;
  59
  60         struct {
  61                 int             gpio;
  62                 struct gpio_desc *desc;
  63                 unsigned int    irq;
  64                 const char      *name;
  65         } stat[6];
  66 #define SOC_STAT_CD             0       /* Card detect */
  67 #define SOC_STAT_BVD1           1       /* BATDEAD / IOSTSCHG */
  68 #define SOC_STAT_BVD2           2       /* BATWARN / IOSPKR */
  69 #define SOC_STAT_RDY            3       /* Ready / Interrupt */
  70 #define SOC_STAT_VS1            4       /* Voltage sense 1 */
  71 #define SOC_STAT_VS2            5       /* Voltage sense 2 */
  72
  73         struct gpio_desc        *gpio_reset;
  74         struct gpio_desc        *gpio_bus_enable;
  75         struct soc_pcmcia_regulator vcc;
  76         struct soc_pcmcia_regulator vpp;
  77
  78         unsigned int            irq_state;
  79
  80 #ifdef CONFIG_CPU_FREQ
  81         struct notifier_block   cpufreq_nb;
  82 #endif
  83         struct timer_list       poll_timer;
  84         struct list_head        node;
  85         void *driver_data;
  86 };
  87
  88 struct skt_dev_info {
  89         int nskt;
  90         struct soc_pcmcia_socket skt[0];
  91 };
  92
  93 struct pcmcia_state {
  94   unsigned detect: 1,
  95             ready: 1,
  96              bvd1: 1,
  97              bvd2: 1,
  98            wrprot: 1,
  99             vs_3v: 1,
 100             vs_Xv: 1;
 101 };
 102
 103 struct pcmcia_low_level {
 104         struct module *owner;
 105
 106         /* first socket in system */
 107         int first;
 108         /* nr of sockets */
 109         int nr;
 110
 111         int (*hw_init)(struct soc_pcmcia_socket *);
 112         void (*hw_shutdown)(struct soc_pcmcia_socket *);
 113
 114         void (*socket_state)(struct soc_pcmcia_socket *, struct pcmcia_state *);
 115         int (*configure_socket)(struct soc_pcmcia_socket *, const socket_state_t *);
 116
 117         /*
 118          * Enable card status IRQs on (re-)initialisation.  This can
 119          * be called at initialisation, power management event, or
 120          * pcmcia event.
 121          */
 122         void (*socket_init)(struct soc_pcmcia_socket *);
 123
 124         /*
 125          * Disable card status IRQs and PCMCIA bus on suspend.
 126          */
 127         void (*socket_suspend)(struct soc_pcmcia_socket *);
 128
 129         /*
 130          * Hardware specific timing routines.
 131          * If provided, the get_timing routine overrides the SOC default.
 132          */
 133         unsigned int (*get_timing)(struct soc_pcmcia_socket *, unsigned int, unsigned int);
 134         int (*set_timing)(struct soc_pcmcia_socket *);
 135         int (*show_timing)(struct soc_pcmcia_socket *, char *);
 136
 137 #ifdef CONFIG_CPU_FREQ
 138         /*
 139          * CPUFREQ support.
 140          */
 141         int (*frequency_change)(struct soc_pcmcia_socket *, unsigned long, struct cpufreq_freqs *);
 142 #endif
 143 };
 144
 145
 146 struct soc_pcmcia_timing {
 147         unsigned short io;
 148         unsigned short mem;
 149         unsigned short attr;
 150 };
 151
 152 extern void soc_common_pcmcia_get_timing(struct soc_pcmcia_socket *, struct soc_pcmcia_timing *);
 153
 154 void soc_pcmcia_init_one(struct soc_pcmcia_socket *skt,
 155         const struct pcmcia_low_level *ops, struct device *dev);
 156 void soc_pcmcia_remove_one(struct soc_pcmcia_socket *skt);
 157 int soc_pcmcia_add_one(struct soc_pcmcia_socket *skt);
 158 int soc_pcmcia_request_gpiods(struct soc_pcmcia_socket *skt);
 159
 160 void soc_common_cf_socket_state(struct soc_pcmcia_socket *skt,
 161         struct pcmcia_state *state);
 162
 163 int soc_pcmcia_regulator_set(struct soc_pcmcia_socket *skt,
 164         struct soc_pcmcia_regulator *r, int v);
 165
 166 #ifdef CONFIG_PCMCIA_DEBUG
 167
 168 extern void soc_pcmcia_debug(struct soc_pcmcia_socket *skt, const char *func,
 169                              int lvl, const char *fmt, ...);
 170
 171 #define debug(skt, lvl, fmt, arg...) \
 172         soc_pcmcia_debug(skt, __func__, lvl, fmt , ## arg)
 173
 174 #else
 175 #define debug(skt, lvl, fmt, arg...) do { } while (0)
 176 #endif
 177
 178
 179 /*
 180  * The PC Card Standard, Release 7, section 4.13.4, says that twIORD
 181  * has a minimum value of 165ns. Section 4.13.5 says that twIOWR has
 182  * a minimum value of 165ns, as well. Section 4.7.2 (describing
 183  * common and attribute memory write timing) says that twWE has a
 184  * minimum value of 150ns for a 250ns cycle time (for 5V operation;
 185  * see section 4.7.4), or 300ns for a 600ns cycle time (for 3.3V
 186  * operation, also section 4.7.4). Section 4.7.3 says that taOE
 187  * has a maximum value of 150ns for a 300ns cycle time (for 5V
 188  * operation), or 300ns for a 600ns cycle time (for 3.3V operation).
 189  *
 190  * When configuring memory maps, Card Services appears to adopt the policy
 191  * that a memory access time of "0" means "use the default." The default
 192  * PCMCIA I/O command width time is 165ns. The default PCMCIA 5V attribute
 193  * and memory command width time is 150ns; the PCMCIA 3.3V attribute and
 194  * memory command width time is 300ns.
 195  */
 196 #define SOC_PCMCIA_IO_ACCESS            (165)
 197 #define SOC_PCMCIA_5V_MEM_ACCESS        (150)
 198 #define SOC_PCMCIA_3V_MEM_ACCESS        (300)
 199 #define SOC_PCMCIA_ATTR_MEM_ACCESS      (300)
 200
 201 /*
 202  * The socket driver actually works nicely in interrupt-driven form,
 203  * so the (relatively infrequent) polling is "just to be sure."
 204  */
 205 #define SOC_PCMCIA_POLL_PERIOD    (2*HZ)
 206
 207
 208 /* I/O pins replacing memory pins
 209  * (PCMCIA System Architecture, 2nd ed., by Don Anderson, p.75)
 210  *
 211  * These signals change meaning when going from memory-only to
 212  * memory-or-I/O interface:
 213  */
 214 #define iostschg bvd1
 215 #define iospkr   bvd2
 216
 217 #endif