/* 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>
#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
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