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 20 struct device; 21 struct gpio_desc; 22 struct pcmcia_low_level; 23 struct regulator; 24 25 struct 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 */ 34 struct 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 89 struct skt_dev_info { 90 int nskt; 91 struct soc_pcmcia_socket skt[0]; 92 }; 93 94 struct 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 }; 103 104 struct 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 }; 145 146 147 struct soc_pcmcia_timing { 148 unsigned short io; 149 unsigned short mem; 150 unsigned short attr; 151 }; 152 153 extern void soc_common_pcmcia_get_timing(struct soc_pcmcia_socket *, struct soc_pcmcia_timing *); 154 155 void soc_pcmcia_init_one(struct soc_pcmcia_socket *skt, 156 const struct pcmcia_low_level *ops, struct device *dev); 157 void soc_pcmcia_remove_one(struct soc_pcmcia_socket *skt); 158 int soc_pcmcia_add_one(struct soc_pcmcia_socket *skt); 159 int soc_pcmcia_request_gpiods(struct soc_pcmcia_socket *skt); 160 161 void soc_common_cf_socket_state(struct soc_pcmcia_socket *skt, 162 struct pcmcia_state *state); 163 164 int soc_pcmcia_regulator_set(struct soc_pcmcia_socket *skt, 165 struct soc_pcmcia_regulator *r, int v); 166 167 #ifdef CONFIG_PCMCIA_DEBUG 168 169 extern 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