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