2 * linux/drivers/pcmcia/soc_common.h
4 * Copyright (C) 2000 John G Dorsey <john+@cs.cmu.edu>
6 * This file contains definitions for the PCMCIA support code common to
7 * integrated SOCs like the SA-11x0 and PXA2xx microprocessors.
9 #ifndef _ASM_ARCH_PCMCIA
10 #define _ASM_ARCH_PCMCIA
12 /* include the world */
13 #include <linux/clk.h>
14 #include <linux/cpufreq.h>
15 #include <pcmcia/ss.h>
16 #include <pcmcia/cistpl.h>
21 struct pcmcia_low_level;
24 struct soc_pcmcia_regulator {
25 struct regulator *reg;
30 * This structure encapsulates per-socket state which we might need to
31 * use when responding to a Card Services query of some kind.
33 struct soc_pcmcia_socket {
34 struct pcmcia_socket socket;
37 * Info from low level handler
45 const struct pcmcia_low_level *ops;
48 socket_state_t cs_state;
50 unsigned short spd_io[MAX_IO_WIN];
51 unsigned short spd_mem[MAX_WIN];
52 unsigned short spd_attr[MAX_WIN];
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;
62 struct gpio_desc *desc;
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 */
71 struct gpio_desc *gpio_reset;
72 struct gpio_desc *gpio_bus_enable;
73 struct soc_pcmcia_regulator vcc;
74 struct soc_pcmcia_regulator vpp;
76 unsigned int irq_state;
78 struct timer_list poll_timer;
79 struct list_head node;
84 struct soc_pcmcia_socket skt[0];
97 struct pcmcia_low_level {
100 /* first socket in system */
105 int (*hw_init)(struct soc_pcmcia_socket *);
106 void (*hw_shutdown)(struct soc_pcmcia_socket *);
108 void (*socket_state)(struct soc_pcmcia_socket *, struct pcmcia_state *);
109 int (*configure_socket)(struct soc_pcmcia_socket *, const socket_state_t *);
112 * Enable card status IRQs on (re-)initialisation. This can
113 * be called at initialisation, power management event, or
116 void (*socket_init)(struct soc_pcmcia_socket *);
119 * Disable card status IRQs and PCMCIA bus on suspend.
121 void (*socket_suspend)(struct soc_pcmcia_socket *);
124 * Hardware specific timing routines.
125 * If provided, the get_timing routine overrides the SOC default.
127 unsigned int (*get_timing)(struct soc_pcmcia_socket *, unsigned int, unsigned int);
128 int (*set_timing)(struct soc_pcmcia_socket *);
129 int (*show_timing)(struct soc_pcmcia_socket *, char *);
131 #ifdef CONFIG_CPU_FREQ
135 int (*frequency_change)(struct soc_pcmcia_socket *, unsigned long, struct cpufreq_freqs *);
140 struct soc_pcmcia_timing {
146 extern void soc_common_pcmcia_get_timing(struct soc_pcmcia_socket *, struct soc_pcmcia_timing *);
148 void soc_pcmcia_init_one(struct soc_pcmcia_socket *skt,
149 struct pcmcia_low_level *ops, struct device *dev);
150 void soc_pcmcia_remove_one(struct soc_pcmcia_socket *skt);
151 int soc_pcmcia_add_one(struct soc_pcmcia_socket *skt);
152 int soc_pcmcia_request_gpiods(struct soc_pcmcia_socket *skt);
154 void soc_common_cf_socket_state(struct soc_pcmcia_socket *skt,
155 struct pcmcia_state *state);
157 int soc_pcmcia_regulator_set(struct soc_pcmcia_socket *skt,
158 struct soc_pcmcia_regulator *r, int v);
160 #ifdef CONFIG_PCMCIA_DEBUG
162 extern void soc_pcmcia_debug(struct soc_pcmcia_socket *skt, const char *func,
163 int lvl, const char *fmt, ...);
165 #define debug(skt, lvl, fmt, arg...) \
166 soc_pcmcia_debug(skt, __func__, lvl, fmt , ## arg)
169 #define debug(skt, lvl, fmt, arg...) do { } while (0)
174 * The PC Card Standard, Release 7, section 4.13.4, says that twIORD
175 * has a minimum value of 165ns. Section 4.13.5 says that twIOWR has
176 * a minimum value of 165ns, as well. Section 4.7.2 (describing
177 * common and attribute memory write timing) says that twWE has a
178 * minimum value of 150ns for a 250ns cycle time (for 5V operation;
179 * see section 4.7.4), or 300ns for a 600ns cycle time (for 3.3V
180 * operation, also section 4.7.4). Section 4.7.3 says that taOE
181 * has a maximum value of 150ns for a 300ns cycle time (for 5V
182 * operation), or 300ns for a 600ns cycle time (for 3.3V operation).
184 * When configuring memory maps, Card Services appears to adopt the policy
185 * that a memory access time of "0" means "use the default." The default
186 * PCMCIA I/O command width time is 165ns. The default PCMCIA 5V attribute
187 * and memory command width time is 150ns; the PCMCIA 3.3V attribute and
188 * memory command width time is 300ns.
190 #define SOC_PCMCIA_IO_ACCESS (165)
191 #define SOC_PCMCIA_5V_MEM_ACCESS (150)
192 #define SOC_PCMCIA_3V_MEM_ACCESS (300)
193 #define SOC_PCMCIA_ATTR_MEM_ACCESS (300)
196 * The socket driver actually works nicely in interrupt-driven form,
197 * so the (relatively infrequent) polling is "just to be sure."
199 #define SOC_PCMCIA_POLL_PERIOD (2*HZ)
202 /* I/O pins replacing memory pins
203 * (PCMCIA System Architecture, 2nd ed., by Don Anderson, p.75)
205 * These signals change meaning when going from memory-only to
206 * memory-or-I/O interface:
208 #define iostschg bvd1