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218 lines
5.7 KiB
218 lines
5.7 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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* linux/drivers/pcmcia/soc_common.h |
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* |
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* Copyright (C) 2000 John G Dorsey <[email protected]> |
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* |
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* This file contains definitions for the PCMCIA support code common to |
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* integrated SOCs like the SA-11x0 and PXA2xx microprocessors. |
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*/ |
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#ifndef _ASM_ARCH_PCMCIA |
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#define _ASM_ARCH_PCMCIA |
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/* include the world */ |
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#include <linux/clk.h> |
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#include <linux/cpufreq.h> |
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#include <pcmcia/ss.h> |
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#include <pcmcia/cistpl.h> |
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struct device; |
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struct gpio_desc; |
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struct pcmcia_low_level; |
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struct regulator; |
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struct soc_pcmcia_regulator { |
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struct regulator *reg; |
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bool on; |
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}; |
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/* |
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* This structure encapsulates per-socket state which we might need to |
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* use when responding to a Card Services query of some kind. |
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*/ |
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struct soc_pcmcia_socket { |
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struct pcmcia_socket socket; |
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/* |
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* Info from low level handler |
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*/ |
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unsigned int nr; |
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struct clk *clk; |
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/* |
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* Core PCMCIA state |
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*/ |
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const struct pcmcia_low_level *ops; |
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unsigned int status; |
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socket_state_t cs_state; |
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unsigned short spd_io[MAX_IO_WIN]; |
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unsigned short spd_mem[MAX_WIN]; |
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unsigned short spd_attr[MAX_WIN]; |
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struct resource res_skt; |
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struct resource res_io; |
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struct resource res_mem; |
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struct resource res_attr; |
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void __iomem *virt_io; |
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struct { |
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int gpio; |
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struct gpio_desc *desc; |
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unsigned int irq; |
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const char *name; |
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} stat[6]; |
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#define SOC_STAT_CD 0 /* Card detect */ |
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#define SOC_STAT_BVD1 1 /* BATDEAD / IOSTSCHG */ |
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#define SOC_STAT_BVD2 2 /* BATWARN / IOSPKR */ |
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#define SOC_STAT_RDY 3 /* Ready / Interrupt */ |
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#define SOC_STAT_VS1 4 /* Voltage sense 1 */ |
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#define SOC_STAT_VS2 5 /* Voltage sense 2 */ |
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struct gpio_desc *gpio_reset; |
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struct gpio_desc *gpio_bus_enable; |
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struct soc_pcmcia_regulator vcc; |
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struct soc_pcmcia_regulator vpp; |
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unsigned int irq_state; |
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#ifdef CONFIG_CPU_FREQ |
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struct notifier_block cpufreq_nb; |
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#endif |
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struct timer_list poll_timer; |
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struct list_head node; |
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void *driver_data; |
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}; |
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struct skt_dev_info { |
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int nskt; |
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struct soc_pcmcia_socket skt[]; |
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}; |
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struct pcmcia_state { |
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unsigned detect: 1, |
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ready: 1, |
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bvd1: 1, |
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bvd2: 1, |
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wrprot: 1, |
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vs_3v: 1, |
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vs_Xv: 1; |
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}; |
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struct pcmcia_low_level { |
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struct module *owner; |
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/* first socket in system */ |
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int first; |
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/* nr of sockets */ |
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int nr; |
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int (*hw_init)(struct soc_pcmcia_socket *); |
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void (*hw_shutdown)(struct soc_pcmcia_socket *); |
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void (*socket_state)(struct soc_pcmcia_socket *, struct pcmcia_state *); |
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int (*configure_socket)(struct soc_pcmcia_socket *, const socket_state_t *); |
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/* |
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* Enable card status IRQs on (re-)initialisation. This can |
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* be called at initialisation, power management event, or |
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* pcmcia event. |
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*/ |
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void (*socket_init)(struct soc_pcmcia_socket *); |
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/* |
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* Disable card status IRQs and PCMCIA bus on suspend. |
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*/ |
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void (*socket_suspend)(struct soc_pcmcia_socket *); |
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/* |
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* Hardware specific timing routines. |
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* If provided, the get_timing routine overrides the SOC default. |
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*/ |
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unsigned int (*get_timing)(struct soc_pcmcia_socket *, unsigned int, unsigned int); |
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int (*set_timing)(struct soc_pcmcia_socket *); |
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int (*show_timing)(struct soc_pcmcia_socket *, char *); |
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#ifdef CONFIG_CPU_FREQ |
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/* |
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* CPUFREQ support. |
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*/ |
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int (*frequency_change)(struct soc_pcmcia_socket *, unsigned long, struct cpufreq_freqs *); |
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#endif |
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}; |
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struct soc_pcmcia_timing { |
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unsigned short io; |
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unsigned short mem; |
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unsigned short attr; |
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}; |
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extern void soc_common_pcmcia_get_timing(struct soc_pcmcia_socket *, struct soc_pcmcia_timing *); |
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void soc_pcmcia_init_one(struct soc_pcmcia_socket *skt, |
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const struct pcmcia_low_level *ops, struct device *dev); |
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void soc_pcmcia_remove_one(struct soc_pcmcia_socket *skt); |
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int soc_pcmcia_add_one(struct soc_pcmcia_socket *skt); |
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int soc_pcmcia_request_gpiods(struct soc_pcmcia_socket *skt); |
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void soc_common_cf_socket_state(struct soc_pcmcia_socket *skt, |
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struct pcmcia_state *state); |
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int soc_pcmcia_regulator_set(struct soc_pcmcia_socket *skt, |
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struct soc_pcmcia_regulator *r, int v); |
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#ifdef CONFIG_PCMCIA_DEBUG |
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extern void soc_pcmcia_debug(struct soc_pcmcia_socket *skt, const char *func, |
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int lvl, const char *fmt, ...); |
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#define debug(skt, lvl, fmt, arg...) \ |
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soc_pcmcia_debug(skt, __func__, lvl, fmt , ## arg) |
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#else |
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#define debug(skt, lvl, fmt, arg...) do { } while (0) |
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#endif |
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/* |
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* The PC Card Standard, Release 7, section 4.13.4, says that twIORD |
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* has a minimum value of 165ns. Section 4.13.5 says that twIOWR has |
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* a minimum value of 165ns, as well. Section 4.7.2 (describing |
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* common and attribute memory write timing) says that twWE has a |
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* minimum value of 150ns for a 250ns cycle time (for 5V operation; |
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* see section 4.7.4), or 300ns for a 600ns cycle time (for 3.3V |
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* operation, also section 4.7.4). Section 4.7.3 says that taOE |
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* has a maximum value of 150ns for a 300ns cycle time (for 5V |
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* operation), or 300ns for a 600ns cycle time (for 3.3V operation). |
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* |
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* When configuring memory maps, Card Services appears to adopt the policy |
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* that a memory access time of "0" means "use the default." The default |
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* PCMCIA I/O command width time is 165ns. The default PCMCIA 5V attribute |
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* and memory command width time is 150ns; the PCMCIA 3.3V attribute and |
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* memory command width time is 300ns. |
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*/ |
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#define SOC_PCMCIA_IO_ACCESS (165) |
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#define SOC_PCMCIA_5V_MEM_ACCESS (150) |
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#define SOC_PCMCIA_3V_MEM_ACCESS (300) |
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#define SOC_PCMCIA_ATTR_MEM_ACCESS (300) |
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/* |
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* The socket driver actually works nicely in interrupt-driven form, |
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* so the (relatively infrequent) polling is "just to be sure." |
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*/ |
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#define SOC_PCMCIA_POLL_PERIOD (2*HZ) |
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/* I/O pins replacing memory pins |
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* (PCMCIA System Architecture, 2nd ed., by Don Anderson, p.75) |
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* |
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* These signals change meaning when going from memory-only to |
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* memory-or-I/O interface: |
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*/ |
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#define iostschg bvd1 |
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#define iospkr bvd2 |
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#endif
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