diff options
Diffstat (limited to 'drivers/pcmcia/soc_common.c')
| -rw-r--r-- | drivers/pcmcia/soc_common.c | 894 |
1 files changed, 894 insertions, 0 deletions
diff --git a/drivers/pcmcia/soc_common.c b/drivers/pcmcia/soc_common.c new file mode 100644 index 000000000..3a8c84bb1 --- /dev/null +++ b/drivers/pcmcia/soc_common.c @@ -0,0 +1,894 @@ +/*====================================================================== + + Common support code for the PCMCIA control functionality of + integrated SOCs like the SA-11x0 and PXA2xx microprocessors. + + The contents of this file are subject to the Mozilla Public + License Version 1.1 (the "License"); you may not use this file + except in compliance with the License. You may obtain a copy of + the License at http://www.mozilla.org/MPL/ + + Software distributed under the License is distributed on an "AS + IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or + implied. See the License for the specific language governing + rights and limitations under the License. + + The initial developer of the original code is John G. Dorsey + <john+@cs.cmu.edu>. Portions created by John G. Dorsey are + Copyright (C) 1999 John G. Dorsey. All Rights Reserved. + + Alternatively, the contents of this file may be used under the + terms of the GNU Public License version 2 (the "GPL"), in which + case the provisions of the GPL are applicable instead of the + above. If you wish to allow the use of your version of this file + only under the terms of the GPL and not to allow others to use + your version of this file under the MPL, indicate your decision + by deleting the provisions above and replace them with the notice + and other provisions required by the GPL. If you do not delete + the provisions above, a recipient may use your version of this + file under either the MPL or the GPL. + +======================================================================*/ + + +#include <linux/cpufreq.h> +#include <linux/gpio.h> +#include <linux/gpio/consumer.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/irq.h> +#include <linux/kernel.h> +#include <linux/mm.h> +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/mutex.h> +#include <linux/regulator/consumer.h> +#include <linux/spinlock.h> +#include <linux/timer.h> + +#include <mach/hardware.h> + +#include "soc_common.h" + +static irqreturn_t soc_common_pcmcia_interrupt(int irq, void *dev); + +#ifdef CONFIG_PCMCIA_DEBUG + +static int pc_debug; +module_param(pc_debug, int, 0644); + +void soc_pcmcia_debug(struct soc_pcmcia_socket *skt, const char *func, + int lvl, const char *fmt, ...) +{ + struct va_format vaf; + va_list args; + if (pc_debug > lvl) { + va_start(args, fmt); + + vaf.fmt = fmt; + vaf.va = &args; + + printk(KERN_DEBUG "skt%u: %s: %pV", skt->nr, func, &vaf); + + va_end(args); + } +} +EXPORT_SYMBOL(soc_pcmcia_debug); + +#endif + +#define to_soc_pcmcia_socket(x) \ + container_of(x, struct soc_pcmcia_socket, socket) + +int soc_pcmcia_regulator_set(struct soc_pcmcia_socket *skt, + struct soc_pcmcia_regulator *r, int v) +{ + bool on; + int ret; + + if (!r->reg) + return 0; + + on = v != 0; + if (r->on == on) + return 0; + + if (on) { + ret = regulator_set_voltage(r->reg, v * 100000, v * 100000); + if (ret) { + int vout = regulator_get_voltage(r->reg) / 100000; + + dev_warn(&skt->socket.dev, + "CS requested %s=%u.%uV, applying %u.%uV\n", + r == &skt->vcc ? "Vcc" : "Vpp", + v / 10, v % 10, vout / 10, vout % 10); + } + + ret = regulator_enable(r->reg); + } else { + ret = regulator_disable(r->reg); + } + if (ret == 0) + r->on = on; + + return ret; +} +EXPORT_SYMBOL_GPL(soc_pcmcia_regulator_set); + +static unsigned short +calc_speed(unsigned short *spds, int num, unsigned short dflt) +{ + unsigned short speed = 0; + int i; + + for (i = 0; i < num; i++) + if (speed < spds[i]) + speed = spds[i]; + if (speed == 0) + speed = dflt; + + return speed; +} + +void soc_common_pcmcia_get_timing(struct soc_pcmcia_socket *skt, + struct soc_pcmcia_timing *timing) +{ + timing->io = + calc_speed(skt->spd_io, MAX_IO_WIN, SOC_PCMCIA_IO_ACCESS); + timing->mem = + calc_speed(skt->spd_mem, MAX_WIN, SOC_PCMCIA_3V_MEM_ACCESS); + timing->attr = + calc_speed(skt->spd_attr, MAX_WIN, SOC_PCMCIA_3V_MEM_ACCESS); +} +EXPORT_SYMBOL(soc_common_pcmcia_get_timing); + +static void __soc_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt, + unsigned int nr) +{ + unsigned int i; + + for (i = 0; i < nr; i++) + if (skt->stat[i].irq) + free_irq(skt->stat[i].irq, skt); + + if (skt->ops->hw_shutdown) + skt->ops->hw_shutdown(skt); + + clk_disable_unprepare(skt->clk); +} + +static void soc_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt) +{ + __soc_pcmcia_hw_shutdown(skt, ARRAY_SIZE(skt->stat)); +} + +int soc_pcmcia_request_gpiods(struct soc_pcmcia_socket *skt) +{ + struct device *dev = skt->socket.dev.parent; + struct gpio_desc *desc; + int i; + + for (i = 0; i < ARRAY_SIZE(skt->stat); i++) { + if (!skt->stat[i].name) + continue; + + desc = devm_gpiod_get(dev, skt->stat[i].name, GPIOD_IN); + if (IS_ERR(desc)) { + dev_err(dev, "Failed to get GPIO for %s: %ld\n", + skt->stat[i].name, PTR_ERR(desc)); + return PTR_ERR(desc); + } + + skt->stat[i].desc = desc; + } + + return 0; +} +EXPORT_SYMBOL_GPL(soc_pcmcia_request_gpiods); + +static int soc_pcmcia_hw_init(struct soc_pcmcia_socket *skt) +{ + int ret = 0, i; + + ret = clk_prepare_enable(skt->clk); + if (ret) + return ret; + + if (skt->ops->hw_init) { + ret = skt->ops->hw_init(skt); + if (ret) { + clk_disable_unprepare(skt->clk); + return ret; + } + } + + for (i = 0; i < ARRAY_SIZE(skt->stat); i++) { + if (gpio_is_valid(skt->stat[i].gpio)) { + unsigned long flags = GPIOF_IN; + + /* CD is active low by default */ + if (i == SOC_STAT_CD) + flags |= GPIOF_ACTIVE_LOW; + + ret = devm_gpio_request_one(skt->socket.dev.parent, + skt->stat[i].gpio, flags, + skt->stat[i].name); + if (ret) { + __soc_pcmcia_hw_shutdown(skt, i); + return ret; + } + + skt->stat[i].desc = gpio_to_desc(skt->stat[i].gpio); + } + + if (i < SOC_STAT_VS1 && skt->stat[i].desc) { + int irq = gpiod_to_irq(skt->stat[i].desc); + + if (irq > 0) { + if (i == SOC_STAT_RDY) + skt->socket.pci_irq = irq; + else + skt->stat[i].irq = irq; + } + } + + if (skt->stat[i].irq) { + ret = request_irq(skt->stat[i].irq, + soc_common_pcmcia_interrupt, + IRQF_TRIGGER_NONE, + skt->stat[i].name, skt); + if (ret) { + __soc_pcmcia_hw_shutdown(skt, i); + return ret; + } + } + } + + return ret; +} + +static void soc_pcmcia_hw_enable(struct soc_pcmcia_socket *skt) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(skt->stat); i++) + if (skt->stat[i].irq) { + irq_set_irq_type(skt->stat[i].irq, IRQ_TYPE_EDGE_RISING); + irq_set_irq_type(skt->stat[i].irq, IRQ_TYPE_EDGE_BOTH); + } +} + +static void soc_pcmcia_hw_disable(struct soc_pcmcia_socket *skt) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(skt->stat); i++) + if (skt->stat[i].irq) + irq_set_irq_type(skt->stat[i].irq, IRQ_TYPE_NONE); +} + +/* + * The CF 3.0 specification says that cards tie VS1 to ground and leave + * VS2 open. Many implementations do not wire up the VS signals, so we + * provide hard-coded values as per the CF 3.0 spec. + */ +void soc_common_cf_socket_state(struct soc_pcmcia_socket *skt, + struct pcmcia_state *state) +{ + state->vs_3v = 1; +} +EXPORT_SYMBOL_GPL(soc_common_cf_socket_state); + +static unsigned int soc_common_pcmcia_skt_state(struct soc_pcmcia_socket *skt) +{ + struct pcmcia_state state; + unsigned int stat; + + memset(&state, 0, sizeof(struct pcmcia_state)); + + /* Make battery voltage state report 'good' */ + state.bvd1 = 1; + state.bvd2 = 1; + + if (skt->stat[SOC_STAT_CD].desc) + state.detect = !!gpiod_get_value(skt->stat[SOC_STAT_CD].desc); + if (skt->stat[SOC_STAT_RDY].desc) + state.ready = !!gpiod_get_value(skt->stat[SOC_STAT_RDY].desc); + if (skt->stat[SOC_STAT_BVD1].desc) + state.bvd1 = !!gpiod_get_value(skt->stat[SOC_STAT_BVD1].desc); + if (skt->stat[SOC_STAT_BVD2].desc) + state.bvd2 = !!gpiod_get_value(skt->stat[SOC_STAT_BVD2].desc); + if (skt->stat[SOC_STAT_VS1].desc) + state.vs_3v = !!gpiod_get_value(skt->stat[SOC_STAT_VS1].desc); + if (skt->stat[SOC_STAT_VS2].desc) + state.vs_Xv = !!gpiod_get_value(skt->stat[SOC_STAT_VS2].desc); + + skt->ops->socket_state(skt, &state); + + stat = state.detect ? SS_DETECT : 0; + stat |= state.ready ? SS_READY : 0; + stat |= state.wrprot ? SS_WRPROT : 0; + stat |= state.vs_3v ? SS_3VCARD : 0; + stat |= state.vs_Xv ? SS_XVCARD : 0; + + /* The power status of individual sockets is not available + * explicitly from the hardware, so we just remember the state + * and regurgitate it upon request: + */ + stat |= skt->cs_state.Vcc ? SS_POWERON : 0; + + if (skt->cs_state.flags & SS_IOCARD) + stat |= state.bvd1 ? 0 : SS_STSCHG; + else { + if (state.bvd1 == 0) + stat |= SS_BATDEAD; + else if (state.bvd2 == 0) + stat |= SS_BATWARN; + } + return stat; +} + +/* + * soc_common_pcmcia_config_skt + * ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + * + * Convert PCMCIA socket state to our socket configure structure. + */ +static int soc_common_pcmcia_config_skt( + struct soc_pcmcia_socket *skt, socket_state_t *state) +{ + int ret; + + ret = skt->ops->configure_socket(skt, state); + if (ret < 0) { + pr_err("soc_common_pcmcia: unable to configure socket %d\n", + skt->nr); + /* restore the previous state */ + WARN_ON(skt->ops->configure_socket(skt, &skt->cs_state)); + return ret; + } + + if (ret == 0) { + struct gpio_desc *descs[2]; + DECLARE_BITMAP(values, 2); + int n = 0; + + if (skt->gpio_reset) { + descs[n] = skt->gpio_reset; + __assign_bit(n++, values, state->flags & SS_RESET); + } + if (skt->gpio_bus_enable) { + descs[n] = skt->gpio_bus_enable; + __assign_bit(n++, values, state->flags & SS_OUTPUT_ENA); + } + + if (n) + gpiod_set_array_value_cansleep(n, descs, NULL, values); + + /* + * This really needs a better solution. The IRQ + * may or may not be claimed by the driver. + */ + if (skt->irq_state != 1 && state->io_irq) { + skt->irq_state = 1; + irq_set_irq_type(skt->socket.pci_irq, + IRQ_TYPE_EDGE_FALLING); + } else if (skt->irq_state == 1 && state->io_irq == 0) { + skt->irq_state = 0; + irq_set_irq_type(skt->socket.pci_irq, IRQ_TYPE_NONE); + } + + skt->cs_state = *state; + } + + return ret; +} + +/* soc_common_pcmcia_sock_init() + * ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + * + * (Re-)Initialise the socket, turning on status interrupts + * and PCMCIA bus. This must wait for power to stabilise + * so that the card status signals report correctly. + * + * Returns: 0 + */ +static int soc_common_pcmcia_sock_init(struct pcmcia_socket *sock) +{ + struct soc_pcmcia_socket *skt = to_soc_pcmcia_socket(sock); + + debug(skt, 2, "initializing socket\n"); + if (skt->ops->socket_init) + skt->ops->socket_init(skt); + soc_pcmcia_hw_enable(skt); + return 0; +} + + +/* + * soc_common_pcmcia_suspend() + * ^^^^^^^^^^^^^^^^^^^^^^^^^^^ + * + * Remove power on the socket, disable IRQs from the card. + * Turn off status interrupts, and disable the PCMCIA bus. + * + * Returns: 0 + */ +static int soc_common_pcmcia_suspend(struct pcmcia_socket *sock) +{ + struct soc_pcmcia_socket *skt = to_soc_pcmcia_socket(sock); + + debug(skt, 2, "suspending socket\n"); + + soc_pcmcia_hw_disable(skt); + if (skt->ops->socket_suspend) + skt->ops->socket_suspend(skt); + + return 0; +} + +static DEFINE_SPINLOCK(status_lock); + +static void soc_common_check_status(struct soc_pcmcia_socket *skt) +{ + unsigned int events; + + debug(skt, 4, "entering PCMCIA monitoring thread\n"); + + do { + unsigned int status; + unsigned long flags; + + status = soc_common_pcmcia_skt_state(skt); + + spin_lock_irqsave(&status_lock, flags); + events = (status ^ skt->status) & skt->cs_state.csc_mask; + skt->status = status; + spin_unlock_irqrestore(&status_lock, flags); + + debug(skt, 4, "events: %s%s%s%s%s%s\n", + events == 0 ? "<NONE>" : "", + events & SS_DETECT ? "DETECT " : "", + events & SS_READY ? "READY " : "", + events & SS_BATDEAD ? "BATDEAD " : "", + events & SS_BATWARN ? "BATWARN " : "", + events & SS_STSCHG ? "STSCHG " : ""); + + if (events) + pcmcia_parse_events(&skt->socket, events); + } while (events); +} + +/* Let's poll for events in addition to IRQs since IRQ only is unreliable... */ +static void soc_common_pcmcia_poll_event(struct timer_list *t) +{ + struct soc_pcmcia_socket *skt = from_timer(skt, t, poll_timer); + debug(skt, 4, "polling for events\n"); + + mod_timer(&skt->poll_timer, jiffies + SOC_PCMCIA_POLL_PERIOD); + + soc_common_check_status(skt); +} + + +/* + * Service routine for socket driver interrupts (requested by the + * low-level PCMCIA init() operation via soc_common_pcmcia_thread()). + * The actual interrupt-servicing work is performed by + * soc_common_pcmcia_thread(), largely because the Card Services event- + * handling code performs scheduling operations which cannot be + * executed from within an interrupt context. + */ +static irqreturn_t soc_common_pcmcia_interrupt(int irq, void *dev) +{ + struct soc_pcmcia_socket *skt = dev; + + debug(skt, 3, "servicing IRQ %d\n", irq); + + soc_common_check_status(skt); + + return IRQ_HANDLED; +} + + +/* + * Implements the get_status() operation for the in-kernel PCMCIA + * service (formerly SS_GetStatus in Card Services). Essentially just + * fills in bits in `status' according to internal driver state or + * the value of the voltage detect chipselect register. + * + * As a debugging note, during card startup, the PCMCIA core issues + * three set_socket() commands in a row the first with RESET deasserted, + * the second with RESET asserted, and the last with RESET deasserted + * again. Following the third set_socket(), a get_status() command will + * be issued. The kernel is looking for the SS_READY flag (see + * setup_socket(), reset_socket(), and unreset_socket() in cs.c). + * + * Returns: 0 + */ +static int +soc_common_pcmcia_get_status(struct pcmcia_socket *sock, unsigned int *status) +{ + struct soc_pcmcia_socket *skt = to_soc_pcmcia_socket(sock); + + skt->status = soc_common_pcmcia_skt_state(skt); + *status = skt->status; + + return 0; +} + + +/* + * Implements the set_socket() operation for the in-kernel PCMCIA + * service (formerly SS_SetSocket in Card Services). We more or + * less punt all of this work and let the kernel handle the details + * of power configuration, reset, &c. We also record the value of + * `state' in order to regurgitate it to the PCMCIA core later. + */ +static int soc_common_pcmcia_set_socket( + struct pcmcia_socket *sock, socket_state_t *state) +{ + struct soc_pcmcia_socket *skt = to_soc_pcmcia_socket(sock); + + debug(skt, 2, "mask: %s%s%s%s%s%s flags: %s%s%s%s%s%s Vcc %d Vpp %d irq %d\n", + (state->csc_mask == 0) ? "<NONE> " : "", + (state->csc_mask & SS_DETECT) ? "DETECT " : "", + (state->csc_mask & SS_READY) ? "READY " : "", + (state->csc_mask & SS_BATDEAD) ? "BATDEAD " : "", + (state->csc_mask & SS_BATWARN) ? "BATWARN " : "", + (state->csc_mask & SS_STSCHG) ? "STSCHG " : "", + (state->flags == 0) ? "<NONE> " : "", + (state->flags & SS_PWR_AUTO) ? "PWR_AUTO " : "", + (state->flags & SS_IOCARD) ? "IOCARD " : "", + (state->flags & SS_RESET) ? "RESET " : "", + (state->flags & SS_SPKR_ENA) ? "SPKR_ENA " : "", + (state->flags & SS_OUTPUT_ENA) ? "OUTPUT_ENA " : "", + state->Vcc, state->Vpp, state->io_irq); + + return soc_common_pcmcia_config_skt(skt, state); +} + + +/* + * Implements the set_io_map() operation for the in-kernel PCMCIA + * service (formerly SS_SetIOMap in Card Services). We configure + * the map speed as requested, but override the address ranges + * supplied by Card Services. + * + * Returns: 0 on success, -1 on error + */ +static int soc_common_pcmcia_set_io_map( + struct pcmcia_socket *sock, struct pccard_io_map *map) +{ + struct soc_pcmcia_socket *skt = to_soc_pcmcia_socket(sock); + unsigned short speed = map->speed; + + debug(skt, 2, "map %u speed %u start 0x%08llx stop 0x%08llx\n", + map->map, map->speed, (unsigned long long)map->start, + (unsigned long long)map->stop); + debug(skt, 2, "flags: %s%s%s%s%s%s%s%s\n", + (map->flags == 0) ? "<NONE>" : "", + (map->flags & MAP_ACTIVE) ? "ACTIVE " : "", + (map->flags & MAP_16BIT) ? "16BIT " : "", + (map->flags & MAP_AUTOSZ) ? "AUTOSZ " : "", + (map->flags & MAP_0WS) ? "0WS " : "", + (map->flags & MAP_WRPROT) ? "WRPROT " : "", + (map->flags & MAP_USE_WAIT) ? "USE_WAIT " : "", + (map->flags & MAP_PREFETCH) ? "PREFETCH " : ""); + + if (map->map >= MAX_IO_WIN) { + printk(KERN_ERR "%s(): map (%d) out of range\n", __func__, + map->map); + return -1; + } + + if (map->flags & MAP_ACTIVE) { + if (speed == 0) + speed = SOC_PCMCIA_IO_ACCESS; + } else { + speed = 0; + } + + skt->spd_io[map->map] = speed; + skt->ops->set_timing(skt); + + if (map->stop == 1) + map->stop = PAGE_SIZE-1; + + map->stop -= map->start; + map->stop += skt->socket.io_offset; + map->start = skt->socket.io_offset; + + return 0; +} + + +/* + * Implements the set_mem_map() operation for the in-kernel PCMCIA + * service (formerly SS_SetMemMap in Card Services). We configure + * the map speed as requested, but override the address ranges + * supplied by Card Services. + * + * Returns: 0 on success, -ERRNO on error + */ +static int soc_common_pcmcia_set_mem_map( + struct pcmcia_socket *sock, struct pccard_mem_map *map) +{ + struct soc_pcmcia_socket *skt = to_soc_pcmcia_socket(sock); + struct resource *res; + unsigned short speed = map->speed; + + debug(skt, 2, "map %u speed %u card_start %08x\n", + map->map, map->speed, map->card_start); + debug(skt, 2, "flags: %s%s%s%s%s%s%s%s\n", + (map->flags == 0) ? "<NONE>" : "", + (map->flags & MAP_ACTIVE) ? "ACTIVE " : "", + (map->flags & MAP_16BIT) ? "16BIT " : "", + (map->flags & MAP_AUTOSZ) ? "AUTOSZ " : "", + (map->flags & MAP_0WS) ? "0WS " : "", + (map->flags & MAP_WRPROT) ? "WRPROT " : "", + (map->flags & MAP_ATTRIB) ? "ATTRIB " : "", + (map->flags & MAP_USE_WAIT) ? "USE_WAIT " : ""); + + if (map->map >= MAX_WIN) + return -EINVAL; + + if (map->flags & MAP_ACTIVE) { + if (speed == 0) + speed = 300; + } else { + speed = 0; + } + + if (map->flags & MAP_ATTRIB) { + res = &skt->res_attr; + skt->spd_attr[map->map] = speed; + skt->spd_mem[map->map] = 0; + } else { + res = &skt->res_mem; + skt->spd_attr[map->map] = 0; + skt->spd_mem[map->map] = speed; + } + + skt->ops->set_timing(skt); + + map->static_start = res->start + map->card_start; + + return 0; +} + +struct bittbl { + unsigned int mask; + const char *name; +}; + +static struct bittbl status_bits[] = { + { SS_WRPROT, "SS_WRPROT" }, + { SS_BATDEAD, "SS_BATDEAD" }, + { SS_BATWARN, "SS_BATWARN" }, + { SS_READY, "SS_READY" }, + { SS_DETECT, "SS_DETECT" }, + { SS_POWERON, "SS_POWERON" }, + { SS_STSCHG, "SS_STSCHG" }, + { SS_3VCARD, "SS_3VCARD" }, + { SS_XVCARD, "SS_XVCARD" }, +}; + +static struct bittbl conf_bits[] = { + { SS_PWR_AUTO, "SS_PWR_AUTO" }, + { SS_IOCARD, "SS_IOCARD" }, + { SS_RESET, "SS_RESET" }, + { SS_DMA_MODE, "SS_DMA_MODE" }, + { SS_SPKR_ENA, "SS_SPKR_ENA" }, + { SS_OUTPUT_ENA, "SS_OUTPUT_ENA" }, +}; + +static void dump_bits(char **p, const char *prefix, + unsigned int val, struct bittbl *bits, int sz) +{ + char *b = *p; + int i; + + b += sprintf(b, "%-9s:", prefix); + for (i = 0; i < sz; i++) + if (val & bits[i].mask) + b += sprintf(b, " %s", bits[i].name); + *b++ = '\n'; + *p = b; +} + +/* + * Implements the /sys/class/pcmcia_socket/??/status file. + * + * Returns: the number of characters added to the buffer + */ +static ssize_t show_status( + struct device *dev, struct device_attribute *attr, char *buf) +{ + struct soc_pcmcia_socket *skt = + container_of(dev, struct soc_pcmcia_socket, socket.dev); + char *p = buf; + + p += sprintf(p, "slot : %d\n", skt->nr); + + dump_bits(&p, "status", skt->status, + status_bits, ARRAY_SIZE(status_bits)); + dump_bits(&p, "csc_mask", skt->cs_state.csc_mask, + status_bits, ARRAY_SIZE(status_bits)); + dump_bits(&p, "cs_flags", skt->cs_state.flags, + conf_bits, ARRAY_SIZE(conf_bits)); + + p += sprintf(p, "Vcc : %d\n", skt->cs_state.Vcc); + p += sprintf(p, "Vpp : %d\n", skt->cs_state.Vpp); + p += sprintf(p, "IRQ : %d (%d)\n", skt->cs_state.io_irq, + skt->socket.pci_irq); + if (skt->ops->show_timing) + p += skt->ops->show_timing(skt, p); + + return p-buf; +} +static DEVICE_ATTR(status, S_IRUGO, show_status, NULL); + + +static struct pccard_operations soc_common_pcmcia_operations = { + .init = soc_common_pcmcia_sock_init, + .suspend = soc_common_pcmcia_suspend, + .get_status = soc_common_pcmcia_get_status, + .set_socket = soc_common_pcmcia_set_socket, + .set_io_map = soc_common_pcmcia_set_io_map, + .set_mem_map = soc_common_pcmcia_set_mem_map, +}; + + +#ifdef CONFIG_CPU_FREQ +static int soc_common_pcmcia_cpufreq_nb(struct notifier_block *nb, + unsigned long val, void *data) +{ + struct soc_pcmcia_socket *skt = container_of(nb, struct soc_pcmcia_socket, cpufreq_nb); + struct cpufreq_freqs *freqs = data; + + return skt->ops->frequency_change(skt, val, freqs); +} +#endif + +void soc_pcmcia_init_one(struct soc_pcmcia_socket *skt, + const struct pcmcia_low_level *ops, struct device *dev) +{ + int i; + + skt->ops = ops; + skt->socket.owner = ops->owner; + skt->socket.dev.parent = dev; + skt->socket.pci_irq = NO_IRQ; + + for (i = 0; i < ARRAY_SIZE(skt->stat); i++) + skt->stat[i].gpio = -EINVAL; +} +EXPORT_SYMBOL(soc_pcmcia_init_one); + +void soc_pcmcia_remove_one(struct soc_pcmcia_socket *skt) +{ + del_timer_sync(&skt->poll_timer); + + pcmcia_unregister_socket(&skt->socket); + +#ifdef CONFIG_CPU_FREQ + if (skt->ops->frequency_change) + cpufreq_unregister_notifier(&skt->cpufreq_nb, + CPUFREQ_TRANSITION_NOTIFIER); +#endif + + soc_pcmcia_hw_shutdown(skt); + + /* should not be required; violates some lowlevel drivers */ + soc_common_pcmcia_config_skt(skt, &dead_socket); + + iounmap(skt->virt_io); + skt->virt_io = NULL; + release_resource(&skt->res_attr); + release_resource(&skt->res_mem); + release_resource(&skt->res_io); + release_resource(&skt->res_skt); +} +EXPORT_SYMBOL(soc_pcmcia_remove_one); + +int soc_pcmcia_add_one(struct soc_pcmcia_socket *skt) +{ + int ret; + + skt->cs_state = dead_socket; + + timer_setup(&skt->poll_timer, soc_common_pcmcia_poll_event, 0); + skt->poll_timer.expires = jiffies + SOC_PCMCIA_POLL_PERIOD; + + ret = request_resource(&iomem_resource, &skt->res_skt); + if (ret) + goto out_err_1; + + ret = request_resource(&skt->res_skt, &skt->res_io); + if (ret) + goto out_err_2; + + ret = request_resource(&skt->res_skt, &skt->res_mem); + if (ret) + goto out_err_3; + + ret = request_resource(&skt->res_skt, &skt->res_attr); + if (ret) + goto out_err_4; + + skt->virt_io = ioremap(skt->res_io.start, 0x10000); + if (skt->virt_io == NULL) { + ret = -ENOMEM; + goto out_err_5; + } + + /* + * We initialize default socket timing here, because + * we are not guaranteed to see a SetIOMap operation at + * runtime. + */ + skt->ops->set_timing(skt); + + ret = soc_pcmcia_hw_init(skt); + if (ret) + goto out_err_6; + + skt->socket.ops = &soc_common_pcmcia_operations; + skt->socket.features = SS_CAP_STATIC_MAP|SS_CAP_PCCARD; + skt->socket.resource_ops = &pccard_static_ops; + skt->socket.irq_mask = 0; + skt->socket.map_size = PAGE_SIZE; + skt->socket.io_offset = (unsigned long)skt->virt_io; + + skt->status = soc_common_pcmcia_skt_state(skt); + +#ifdef CONFIG_CPU_FREQ + if (skt->ops->frequency_change) { + skt->cpufreq_nb.notifier_call = soc_common_pcmcia_cpufreq_nb; + + ret = cpufreq_register_notifier(&skt->cpufreq_nb, + CPUFREQ_TRANSITION_NOTIFIER); + if (ret < 0) + dev_err(skt->socket.dev.parent, + "unable to register CPU frequency change notifier for PCMCIA (%d)\n", + ret); + } +#endif + + ret = pcmcia_register_socket(&skt->socket); + if (ret) + goto out_err_7; + + ret = device_create_file(&skt->socket.dev, &dev_attr_status); + if (ret) + goto out_err_8; + + return ret; + + out_err_8: + del_timer_sync(&skt->poll_timer); + pcmcia_unregister_socket(&skt->socket); + + out_err_7: + soc_pcmcia_hw_shutdown(skt); + out_err_6: + iounmap(skt->virt_io); + out_err_5: + release_resource(&skt->res_attr); + out_err_4: + release_resource(&skt->res_mem); + out_err_3: + release_resource(&skt->res_io); + out_err_2: + release_resource(&skt->res_skt); + out_err_1: + + return ret; +} +EXPORT_SYMBOL(soc_pcmcia_add_one); + +MODULE_AUTHOR("John Dorsey <john+@cs.cmu.edu>"); +MODULE_DESCRIPTION("Linux PCMCIA Card Services: Common SoC support"); +MODULE_LICENSE("Dual MPL/GPL"); |