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1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * linux/drivers/pcmcia/soc_common.h
4 *
5 * Copyright (C) 2000 John G Dorsey <john+@cs.cmu.edu>
6 *
7 * This file contains definitions for the PCMCIA support code common to
8 * integrated SOCs like the SA-11x0 and PXA2xx microprocessors.
9 */
10#ifndef _ASM_ARCH_PCMCIA
11#define _ASM_ARCH_PCMCIA
12
13/* include the world */
14#include <linux/clk.h>
15#include <linux/cpufreq.h>
16#include <pcmcia/ss.h>
17#include <pcmcia/cistpl.h>
18
19
20struct device;
21struct gpio_desc;
22struct pcmcia_low_level;
23struct regulator;
24
25struct soc_pcmcia_regulator {
26 struct regulator *reg;
27 bool on;
28};
29
30/*
31 * This structure encapsulates per-socket state which we might need to
32 * use when responding to a Card Services query of some kind.
33 */
34struct soc_pcmcia_socket {
35 struct pcmcia_socket socket;
36
37 /*
38 * Info from low level handler
39 */
40 unsigned int nr;
41 struct clk *clk;
42
43 /*
44 * Core PCMCIA state
45 */
46 const struct pcmcia_low_level *ops;
47
48 unsigned int status;
49 socket_state_t cs_state;
50
51 unsigned short spd_io[MAX_IO_WIN];
52 unsigned short spd_mem[MAX_WIN];
53 unsigned short spd_attr[MAX_WIN];
54
55 struct resource res_skt;
56 struct resource res_io;
57 struct resource res_mem;
58 struct resource res_attr;
59 void __iomem *virt_io;
60
61 struct {
62 int gpio;
63 struct gpio_desc *desc;
64 unsigned int irq;
65 const char *name;
66 } stat[6];
67#define SOC_STAT_CD 0 /* Card detect */
68#define SOC_STAT_BVD1 1 /* BATDEAD / IOSTSCHG */
69#define SOC_STAT_BVD2 2 /* BATWARN / IOSPKR */
70#define SOC_STAT_RDY 3 /* Ready / Interrupt */
71#define SOC_STAT_VS1 4 /* Voltage sense 1 */
72#define SOC_STAT_VS2 5 /* Voltage sense 2 */
73
74 struct gpio_desc *gpio_reset;
75 struct gpio_desc *gpio_bus_enable;
76 struct soc_pcmcia_regulator vcc;
77 struct soc_pcmcia_regulator vpp;
78
79 unsigned int irq_state;
80
81#ifdef CONFIG_CPU_FREQ
82 struct notifier_block cpufreq_nb;
83#endif
84 struct timer_list poll_timer;
85 struct list_head node;
86 void *driver_data;
87};
88
89struct skt_dev_info {
90 int nskt;
91 struct soc_pcmcia_socket skt[0];
92};
93
94struct pcmcia_state {
95 unsigned detect: 1,
96 ready: 1,
97 bvd1: 1,
98 bvd2: 1,
99 wrprot: 1,
100 vs_3v: 1,
101 vs_Xv: 1;
102};
103
104struct pcmcia_low_level {
105 struct module *owner;
106
107 /* first socket in system */
108 int first;
109 /* nr of sockets */
110 int nr;
111
112 int (*hw_init)(struct soc_pcmcia_socket *);
113 void (*hw_shutdown)(struct soc_pcmcia_socket *);
114
115 void (*socket_state)(struct soc_pcmcia_socket *, struct pcmcia_state *);
116 int (*configure_socket)(struct soc_pcmcia_socket *, const socket_state_t *);
117
118 /*
119 * Enable card status IRQs on (re-)initialisation. This can
120 * be called at initialisation, power management event, or
121 * pcmcia event.
122 */
123 void (*socket_init)(struct soc_pcmcia_socket *);
124
125 /*
126 * Disable card status IRQs and PCMCIA bus on suspend.
127 */
128 void (*socket_suspend)(struct soc_pcmcia_socket *);
129
130 /*
131 * Hardware specific timing routines.
132 * If provided, the get_timing routine overrides the SOC default.
133 */
134 unsigned int (*get_timing)(struct soc_pcmcia_socket *, unsigned int, unsigned int);
135 int (*set_timing)(struct soc_pcmcia_socket *);
136 int (*show_timing)(struct soc_pcmcia_socket *, char *);
137
138#ifdef CONFIG_CPU_FREQ
139 /*
140 * CPUFREQ support.
141 */
142 int (*frequency_change)(struct soc_pcmcia_socket *, unsigned long, struct cpufreq_freqs *);
143#endif
144};
145
146
147struct soc_pcmcia_timing {
148 unsigned short io;
149 unsigned short mem;
150 unsigned short attr;
151};
152
153extern void soc_common_pcmcia_get_timing(struct soc_pcmcia_socket *, struct soc_pcmcia_timing *);
154
155void soc_pcmcia_init_one(struct soc_pcmcia_socket *skt,
156 const struct pcmcia_low_level *ops, struct device *dev);
157void soc_pcmcia_remove_one(struct soc_pcmcia_socket *skt);
158int soc_pcmcia_add_one(struct soc_pcmcia_socket *skt);
159int soc_pcmcia_request_gpiods(struct soc_pcmcia_socket *skt);
160
161void soc_common_cf_socket_state(struct soc_pcmcia_socket *skt,
162 struct pcmcia_state *state);
163
164int soc_pcmcia_regulator_set(struct soc_pcmcia_socket *skt,
165 struct soc_pcmcia_regulator *r, int v);
166
167#ifdef CONFIG_PCMCIA_DEBUG
168
169extern void soc_pcmcia_debug(struct soc_pcmcia_socket *skt, const char *func,
170 int lvl, const char *fmt, ...);
171
172#define debug(skt, lvl, fmt, arg...) \
173 soc_pcmcia_debug(skt, __func__, lvl, fmt , ## arg)
174
175#else
176#define debug(skt, lvl, fmt, arg...) do { } while (0)
177#endif
178
179
180/*
181 * The PC Card Standard, Release 7, section 4.13.4, says that twIORD
182 * has a minimum value of 165ns. Section 4.13.5 says that twIOWR has
183 * a minimum value of 165ns, as well. Section 4.7.2 (describing
184 * common and attribute memory write timing) says that twWE has a
185 * minimum value of 150ns for a 250ns cycle time (for 5V operation;
186 * see section 4.7.4), or 300ns for a 600ns cycle time (for 3.3V
187 * operation, also section 4.7.4). Section 4.7.3 says that taOE
188 * has a maximum value of 150ns for a 300ns cycle time (for 5V
189 * operation), or 300ns for a 600ns cycle time (for 3.3V operation).
190 *
191 * When configuring memory maps, Card Services appears to adopt the policy
192 * that a memory access time of "0" means "use the default." The default
193 * PCMCIA I/O command width time is 165ns. The default PCMCIA 5V attribute
194 * and memory command width time is 150ns; the PCMCIA 3.3V attribute and
195 * memory command width time is 300ns.
196 */
197#define SOC_PCMCIA_IO_ACCESS (165)
198#define SOC_PCMCIA_5V_MEM_ACCESS (150)
199#define SOC_PCMCIA_3V_MEM_ACCESS (300)
200#define SOC_PCMCIA_ATTR_MEM_ACCESS (300)
201
202/*
203 * The socket driver actually works nicely in interrupt-driven form,
204 * so the (relatively infrequent) polling is "just to be sure."
205 */
206#define SOC_PCMCIA_POLL_PERIOD (2*HZ)
207
208
209/* I/O pins replacing memory pins
210 * (PCMCIA System Architecture, 2nd ed., by Don Anderson, p.75)
211 *
212 * These signals change meaning when going from memory-only to
213 * memory-or-I/O interface:
214 */
215#define iostschg bvd1
216#define iospkr bvd2
217
218#endif
219

Warning: That file was not part of the compilation database. It may have many parsing errors.