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