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soc_common.h
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soc_common.h
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/* SPDX-License-Identifier: GPL-2.0 */
/*
* linux/drivers/pcmcia/soc_common.h
*
* Copyright (C) 2000 John G Dorsey <john+@cs.cmu.edu>
*
* This file contains definitions for the PCMCIA support code common to
* integrated SOCs like the SA-11x0 and PXA2xx microprocessors.
*/
#ifndef _ASM_ARCH_PCMCIA
#define _ASM_ARCH_PCMCIA
/* include the world */
#include <linux/clk.h>
#include <linux/cpufreq.h>
#include <pcmcia/cistpl.h>
#include <pcmcia/soc_common.h>
struct device;
struct gpio_desc;
struct pcmcia_low_level;
struct regulator;
struct skt_dev_info {
int nskt;
struct soc_pcmcia_socket skt[];
};
struct soc_pcmcia_timing {
unsigned short io;
unsigned short mem;
unsigned short attr;
};
extern void soc_common_pcmcia_get_timing(struct soc_pcmcia_socket *, struct soc_pcmcia_timing *);
void soc_pcmcia_init_one(struct soc_pcmcia_socket *skt,
const struct pcmcia_low_level *ops, struct device *dev);
void soc_pcmcia_remove_one(struct soc_pcmcia_socket *skt);
int soc_pcmcia_add_one(struct soc_pcmcia_socket *skt);
int soc_pcmcia_request_gpiods(struct soc_pcmcia_socket *skt);
void soc_common_cf_socket_state(struct soc_pcmcia_socket *skt,
struct pcmcia_state *state);
int soc_pcmcia_regulator_set(struct soc_pcmcia_socket *skt,
struct soc_pcmcia_regulator *r, int v);
#ifdef CONFIG_PCMCIA_DEBUG
extern void soc_pcmcia_debug(struct soc_pcmcia_socket *skt, const char *func,
int lvl, const char *fmt, ...);
#define debug(skt, lvl, fmt, arg...) \
soc_pcmcia_debug(skt, __func__, lvl, fmt , ## arg)
#else
#define debug(skt, lvl, fmt, arg...) do { } while (0)
#endif
/*
* The PC Card Standard, Release 7, section 4.13.4, says that twIORD
* has a minimum value of 165ns. Section 4.13.5 says that twIOWR has
* a minimum value of 165ns, as well. Section 4.7.2 (describing
* common and attribute memory write timing) says that twWE has a
* minimum value of 150ns for a 250ns cycle time (for 5V operation;
* see section 4.7.4), or 300ns for a 600ns cycle time (for 3.3V
* operation, also section 4.7.4). Section 4.7.3 says that taOE
* has a maximum value of 150ns for a 300ns cycle time (for 5V
* operation), or 300ns for a 600ns cycle time (for 3.3V operation).
*
* When configuring memory maps, Card Services appears to adopt the policy
* that a memory access time of "0" means "use the default." The default
* PCMCIA I/O command width time is 165ns. The default PCMCIA 5V attribute
* and memory command width time is 150ns; the PCMCIA 3.3V attribute and
* memory command width time is 300ns.
*/
#define SOC_PCMCIA_IO_ACCESS (165)
#define SOC_PCMCIA_5V_MEM_ACCESS (150)
#define SOC_PCMCIA_3V_MEM_ACCESS (300)
#define SOC_PCMCIA_ATTR_MEM_ACCESS (300)
/*
* The socket driver actually works nicely in interrupt-driven form,
* so the (relatively infrequent) polling is "just to be sure."
*/
#define SOC_PCMCIA_POLL_PERIOD (2*HZ)
/* I/O pins replacing memory pins
* (PCMCIA System Architecture, 2nd ed., by Don Anderson, p.75)
*
* These signals change meaning when going from memory-only to
* memory-or-I/O interface:
*/
#define iostschg bvd1
#define iospkr bvd2
#endif