--- /dev/null
+/*======================================================================
+
+ 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/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/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)
+
+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 (gpio_is_valid(skt->stat[i].gpio))
+ gpio_free(skt->stat[i].gpio);
+ }
+
+ 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));
+}
+
+static int soc_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
+{
+ int ret = 0, i;
+
+ clk_prepare_enable(skt->clk);
+
+ if (skt->ops->hw_init) {
+ ret = skt->ops->hw_init(skt);
+ if (ret)
+ return ret;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(skt->stat); i++) {
+ if (gpio_is_valid(skt->stat[i].gpio)) {
+ int irq;
+
+ ret = gpio_request_one(skt->stat[i].gpio, GPIOF_IN,
+ skt->stat[i].name);
+ if (ret) {
+ __soc_pcmcia_hw_shutdown(skt, i);
+ return ret;
+ }
+
+ irq = gpio_to_irq(skt->stat[i].gpio);
+
+ 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) {
+ if (gpio_is_valid(skt->stat[i].gpio))
+ gpio_free(skt->stat[i].gpio);
+ __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);
+}
+
+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;
+
+ /* CD is active low by default */
+ if (gpio_is_valid(skt->stat[SOC_STAT_CD].gpio))
+ state.detect = !gpio_get_value(skt->stat[SOC_STAT_CD].gpio);
+
+ /* RDY and BVD are active high by default */
+ if (gpio_is_valid(skt->stat[SOC_STAT_RDY].gpio))
+ state.ready = !!gpio_get_value(skt->stat[SOC_STAT_RDY].gpio);
+ if (gpio_is_valid(skt->stat[SOC_STAT_BVD1].gpio))
+ state.bvd1 = !!gpio_get_value(skt->stat[SOC_STAT_BVD1].gpio);
+ if (gpio_is_valid(skt->stat[SOC_STAT_BVD2].gpio))
+ state.bvd2 = !!gpio_get_value(skt->stat[SOC_STAT_BVD2].gpio);
+
+ 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 ? SS_STSCHG : 0;
+ 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) {
+ /*
+ * 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;
+ }
+
+ if (ret < 0)
+ printk(KERN_ERR "soc_common_pcmcia: unable to configure "
+ "socket %d\n", skt->nr);
+
+ 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(unsigned long dummy)
+{
+ struct soc_pcmcia_socket *skt = (struct soc_pcmcia_socket *)dummy;
+ 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,
+};
+
+
+static LIST_HEAD(soc_pcmcia_sockets);
+static DEFINE_MUTEX(soc_pcmcia_sockets_lock);
+
+#ifdef CONFIG_CPU_FREQ
+static int
+soc_pcmcia_notifier(struct notifier_block *nb, unsigned long val, void *data)
+{
+ struct soc_pcmcia_socket *skt;
+ struct cpufreq_freqs *freqs = data;
+ int ret = 0;
+
+ mutex_lock(&soc_pcmcia_sockets_lock);
+ list_for_each_entry(skt, &soc_pcmcia_sockets, node)
+ if (skt->ops->frequency_change)
+ ret += skt->ops->frequency_change(skt, val, freqs);
+ mutex_unlock(&soc_pcmcia_sockets_lock);
+
+ return ret;
+}
+
+static struct notifier_block soc_pcmcia_notifier_block = {
+ .notifier_call = soc_pcmcia_notifier
+};
+
+static int soc_pcmcia_cpufreq_register(void)
+{
+ int ret;
+
+ ret = cpufreq_register_notifier(&soc_pcmcia_notifier_block,
+ CPUFREQ_TRANSITION_NOTIFIER);
+ if (ret < 0)
+ printk(KERN_ERR "Unable to register CPU frequency change "
+ "notifier for PCMCIA (%d)\n", ret);
+ return ret;
+}
+fs_initcall(soc_pcmcia_cpufreq_register);
+
+static void soc_pcmcia_cpufreq_unregister(void)
+{
+ cpufreq_unregister_notifier(&soc_pcmcia_notifier_block,
+ CPUFREQ_TRANSITION_NOTIFIER);
+}
+module_exit(soc_pcmcia_cpufreq_unregister);
+
+#endif
+
+void soc_pcmcia_init_one(struct soc_pcmcia_socket *skt,
+ 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)
+{
+ mutex_lock(&soc_pcmcia_sockets_lock);
+ del_timer_sync(&skt->poll_timer);
+
+ pcmcia_unregister_socket(&skt->socket);
+
+ soc_pcmcia_hw_shutdown(skt);
+
+ /* should not be required; violates some lowlevel drivers */
+ soc_common_pcmcia_config_skt(skt, &dead_socket);
+
+ list_del(&skt->node);
+ mutex_unlock(&soc_pcmcia_sockets_lock);
+
+ 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;
+
+ setup_timer(&skt->poll_timer, soc_common_pcmcia_poll_event,
+ (unsigned long)skt);
+ 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;
+ }
+
+ mutex_lock(&soc_pcmcia_sockets_lock);
+
+ list_add(&skt->node, &soc_pcmcia_sockets);
+
+ /*
+ * 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);
+
+ ret = pcmcia_register_socket(&skt->socket);
+ if (ret)
+ goto out_err_7;
+
+ add_timer(&skt->poll_timer);
+
+ mutex_unlock(&soc_pcmcia_sockets_lock);
+
+ ret = device_create_file(&skt->socket.dev, &dev_attr_status);
+ if (ret)
+ goto out_err_8;
+
+ return ret;
+
+ out_err_8:
+ mutex_lock(&soc_pcmcia_sockets_lock);
+ del_timer_sync(&skt->poll_timer);
+ pcmcia_unregister_socket(&skt->socket);
+
+ out_err_7:
+ soc_pcmcia_hw_shutdown(skt);
+ out_err_6:
+ list_del(&skt->node);
+ mutex_unlock(&soc_pcmcia_sockets_lock);
+ 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");
Code Review / kvmfornfv.git / blobdiff