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894 lines
23 KiB
894 lines
23 KiB
/*====================================================================== |
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Common support code for the PCMCIA control functionality of |
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integrated SOCs like the SA-11x0 and PXA2xx microprocessors. |
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The contents of this file are subject to the Mozilla Public |
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License Version 1.1 (the "License"); you may not use this file |
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except in compliance with the License. You may obtain a copy of |
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the License at http://www.mozilla.org/MPL/ |
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Software distributed under the License is distributed on an "AS |
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IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or |
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implied. See the License for the specific language governing |
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rights and limitations under the License. |
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The initial developer of the original code is John G. Dorsey |
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<[email protected]>. Portions created by John G. Dorsey are |
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Copyright (C) 1999 John G. Dorsey. All Rights Reserved. |
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Alternatively, the contents of this file may be used under the |
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terms of the GNU Public License version 2 (the "GPL"), in which |
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case the provisions of the GPL are applicable instead of the |
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above. If you wish to allow the use of your version of this file |
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only under the terms of the GPL and not to allow others to use |
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your version of this file under the MPL, indicate your decision |
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by deleting the provisions above and replace them with the notice |
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and other provisions required by the GPL. If you do not delete |
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the provisions above, a recipient may use your version of this |
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file under either the MPL or the GPL. |
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======================================================================*/ |
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#include <linux/cpufreq.h> |
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#include <linux/gpio.h> |
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#include <linux/gpio/consumer.h> |
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#include <linux/init.h> |
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#include <linux/interrupt.h> |
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#include <linux/io.h> |
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#include <linux/irq.h> |
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#include <linux/kernel.h> |
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#include <linux/mm.h> |
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#include <linux/module.h> |
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#include <linux/moduleparam.h> |
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#include <linux/mutex.h> |
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#include <linux/regulator/consumer.h> |
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#include <linux/spinlock.h> |
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#include <linux/timer.h> |
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#include <mach/hardware.h> |
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#include "soc_common.h" |
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static irqreturn_t soc_common_pcmcia_interrupt(int irq, void *dev); |
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#ifdef CONFIG_PCMCIA_DEBUG |
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static int pc_debug; |
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module_param(pc_debug, int, 0644); |
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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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{ |
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struct va_format vaf; |
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va_list args; |
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if (pc_debug > lvl) { |
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va_start(args, fmt); |
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vaf.fmt = fmt; |
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vaf.va = &args; |
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printk(KERN_DEBUG "skt%u: %s: %pV", skt->nr, func, &vaf); |
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va_end(args); |
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} |
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} |
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EXPORT_SYMBOL(soc_pcmcia_debug); |
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#endif |
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#define to_soc_pcmcia_socket(x) \ |
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container_of(x, struct soc_pcmcia_socket, socket) |
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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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{ |
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bool on; |
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int ret; |
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if (!r->reg) |
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return 0; |
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on = v != 0; |
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if (r->on == on) |
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return 0; |
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if (on) { |
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ret = regulator_set_voltage(r->reg, v * 100000, v * 100000); |
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if (ret) { |
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int vout = regulator_get_voltage(r->reg) / 100000; |
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dev_warn(&skt->socket.dev, |
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"CS requested %s=%u.%uV, applying %u.%uV\n", |
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r == &skt->vcc ? "Vcc" : "Vpp", |
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v / 10, v % 10, vout / 10, vout % 10); |
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} |
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ret = regulator_enable(r->reg); |
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} else { |
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ret = regulator_disable(r->reg); |
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} |
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if (ret == 0) |
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r->on = on; |
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return ret; |
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} |
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EXPORT_SYMBOL_GPL(soc_pcmcia_regulator_set); |
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static unsigned short |
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calc_speed(unsigned short *spds, int num, unsigned short dflt) |
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{ |
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unsigned short speed = 0; |
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int i; |
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for (i = 0; i < num; i++) |
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if (speed < spds[i]) |
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speed = spds[i]; |
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if (speed == 0) |
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speed = dflt; |
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return speed; |
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} |
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void soc_common_pcmcia_get_timing(struct soc_pcmcia_socket *skt, |
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struct soc_pcmcia_timing *timing) |
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{ |
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timing->io = |
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calc_speed(skt->spd_io, MAX_IO_WIN, SOC_PCMCIA_IO_ACCESS); |
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timing->mem = |
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calc_speed(skt->spd_mem, MAX_WIN, SOC_PCMCIA_3V_MEM_ACCESS); |
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timing->attr = |
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calc_speed(skt->spd_attr, MAX_WIN, SOC_PCMCIA_3V_MEM_ACCESS); |
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} |
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EXPORT_SYMBOL(soc_common_pcmcia_get_timing); |
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static void __soc_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt, |
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unsigned int nr) |
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{ |
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unsigned int i; |
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for (i = 0; i < nr; i++) |
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if (skt->stat[i].irq) |
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free_irq(skt->stat[i].irq, skt); |
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if (skt->ops->hw_shutdown) |
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skt->ops->hw_shutdown(skt); |
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clk_disable_unprepare(skt->clk); |
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} |
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static void soc_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt) |
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{ |
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__soc_pcmcia_hw_shutdown(skt, ARRAY_SIZE(skt->stat)); |
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} |
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int soc_pcmcia_request_gpiods(struct soc_pcmcia_socket *skt) |
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{ |
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struct device *dev = skt->socket.dev.parent; |
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struct gpio_desc *desc; |
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int i; |
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for (i = 0; i < ARRAY_SIZE(skt->stat); i++) { |
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if (!skt->stat[i].name) |
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continue; |
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desc = devm_gpiod_get(dev, skt->stat[i].name, GPIOD_IN); |
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if (IS_ERR(desc)) { |
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dev_err(dev, "Failed to get GPIO for %s: %ld\n", |
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skt->stat[i].name, PTR_ERR(desc)); |
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return PTR_ERR(desc); |
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} |
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skt->stat[i].desc = desc; |
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} |
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return 0; |
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} |
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EXPORT_SYMBOL_GPL(soc_pcmcia_request_gpiods); |
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static int soc_pcmcia_hw_init(struct soc_pcmcia_socket *skt) |
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{ |
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int ret = 0, i; |
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ret = clk_prepare_enable(skt->clk); |
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if (ret) |
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return ret; |
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if (skt->ops->hw_init) { |
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ret = skt->ops->hw_init(skt); |
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if (ret) { |
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clk_disable_unprepare(skt->clk); |
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return ret; |
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} |
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} |
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for (i = 0; i < ARRAY_SIZE(skt->stat); i++) { |
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if (gpio_is_valid(skt->stat[i].gpio)) { |
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unsigned long flags = GPIOF_IN; |
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/* CD is active low by default */ |
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if (i == SOC_STAT_CD) |
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flags |= GPIOF_ACTIVE_LOW; |
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ret = devm_gpio_request_one(skt->socket.dev.parent, |
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skt->stat[i].gpio, flags, |
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skt->stat[i].name); |
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if (ret) { |
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__soc_pcmcia_hw_shutdown(skt, i); |
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return ret; |
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} |
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skt->stat[i].desc = gpio_to_desc(skt->stat[i].gpio); |
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} |
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if (i < SOC_STAT_VS1 && skt->stat[i].desc) { |
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int irq = gpiod_to_irq(skt->stat[i].desc); |
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if (irq > 0) { |
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if (i == SOC_STAT_RDY) |
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skt->socket.pci_irq = irq; |
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else |
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skt->stat[i].irq = irq; |
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} |
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} |
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if (skt->stat[i].irq) { |
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ret = request_irq(skt->stat[i].irq, |
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soc_common_pcmcia_interrupt, |
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IRQF_TRIGGER_NONE, |
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skt->stat[i].name, skt); |
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if (ret) { |
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__soc_pcmcia_hw_shutdown(skt, i); |
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return ret; |
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} |
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} |
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} |
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return ret; |
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} |
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static void soc_pcmcia_hw_enable(struct soc_pcmcia_socket *skt) |
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{ |
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int i; |
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for (i = 0; i < ARRAY_SIZE(skt->stat); i++) |
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if (skt->stat[i].irq) { |
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irq_set_irq_type(skt->stat[i].irq, IRQ_TYPE_EDGE_RISING); |
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irq_set_irq_type(skt->stat[i].irq, IRQ_TYPE_EDGE_BOTH); |
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} |
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} |
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static void soc_pcmcia_hw_disable(struct soc_pcmcia_socket *skt) |
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{ |
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int i; |
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for (i = 0; i < ARRAY_SIZE(skt->stat); i++) |
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if (skt->stat[i].irq) |
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irq_set_irq_type(skt->stat[i].irq, IRQ_TYPE_NONE); |
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} |
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/* |
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* The CF 3.0 specification says that cards tie VS1 to ground and leave |
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* VS2 open. Many implementations do not wire up the VS signals, so we |
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* provide hard-coded values as per the CF 3.0 spec. |
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*/ |
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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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{ |
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state->vs_3v = 1; |
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} |
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EXPORT_SYMBOL_GPL(soc_common_cf_socket_state); |
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static unsigned int soc_common_pcmcia_skt_state(struct soc_pcmcia_socket *skt) |
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{ |
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struct pcmcia_state state; |
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unsigned int stat; |
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memset(&state, 0, sizeof(struct pcmcia_state)); |
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/* Make battery voltage state report 'good' */ |
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state.bvd1 = 1; |
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state.bvd2 = 1; |
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if (skt->stat[SOC_STAT_CD].desc) |
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state.detect = !!gpiod_get_value(skt->stat[SOC_STAT_CD].desc); |
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if (skt->stat[SOC_STAT_RDY].desc) |
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state.ready = !!gpiod_get_value(skt->stat[SOC_STAT_RDY].desc); |
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if (skt->stat[SOC_STAT_BVD1].desc) |
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state.bvd1 = !!gpiod_get_value(skt->stat[SOC_STAT_BVD1].desc); |
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if (skt->stat[SOC_STAT_BVD2].desc) |
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state.bvd2 = !!gpiod_get_value(skt->stat[SOC_STAT_BVD2].desc); |
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if (skt->stat[SOC_STAT_VS1].desc) |
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state.vs_3v = !!gpiod_get_value(skt->stat[SOC_STAT_VS1].desc); |
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if (skt->stat[SOC_STAT_VS2].desc) |
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state.vs_Xv = !!gpiod_get_value(skt->stat[SOC_STAT_VS2].desc); |
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skt->ops->socket_state(skt, &state); |
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stat = state.detect ? SS_DETECT : 0; |
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stat |= state.ready ? SS_READY : 0; |
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stat |= state.wrprot ? SS_WRPROT : 0; |
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stat |= state.vs_3v ? SS_3VCARD : 0; |
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stat |= state.vs_Xv ? SS_XVCARD : 0; |
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/* The power status of individual sockets is not available |
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* explicitly from the hardware, so we just remember the state |
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* and regurgitate it upon request: |
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*/ |
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stat |= skt->cs_state.Vcc ? SS_POWERON : 0; |
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if (skt->cs_state.flags & SS_IOCARD) |
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stat |= state.bvd1 ? 0 : SS_STSCHG; |
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else { |
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if (state.bvd1 == 0) |
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stat |= SS_BATDEAD; |
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else if (state.bvd2 == 0) |
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stat |= SS_BATWARN; |
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} |
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return stat; |
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} |
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/* |
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* soc_common_pcmcia_config_skt |
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* ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
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* |
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* Convert PCMCIA socket state to our socket configure structure. |
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*/ |
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static int soc_common_pcmcia_config_skt( |
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struct soc_pcmcia_socket *skt, socket_state_t *state) |
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{ |
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int ret; |
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ret = skt->ops->configure_socket(skt, state); |
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if (ret < 0) { |
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pr_err("soc_common_pcmcia: unable to configure socket %d\n", |
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skt->nr); |
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/* restore the previous state */ |
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WARN_ON(skt->ops->configure_socket(skt, &skt->cs_state)); |
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return ret; |
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} |
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if (ret == 0) { |
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struct gpio_desc *descs[2]; |
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DECLARE_BITMAP(values, 2); |
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int n = 0; |
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if (skt->gpio_reset) { |
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descs[n] = skt->gpio_reset; |
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__assign_bit(n++, values, state->flags & SS_RESET); |
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} |
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if (skt->gpio_bus_enable) { |
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descs[n] = skt->gpio_bus_enable; |
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__assign_bit(n++, values, state->flags & SS_OUTPUT_ENA); |
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} |
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if (n) |
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gpiod_set_array_value_cansleep(n, descs, NULL, values); |
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/* |
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* This really needs a better solution. The IRQ |
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* may or may not be claimed by the driver. |
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*/ |
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if (skt->irq_state != 1 && state->io_irq) { |
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skt->irq_state = 1; |
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irq_set_irq_type(skt->socket.pci_irq, |
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IRQ_TYPE_EDGE_FALLING); |
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} else if (skt->irq_state == 1 && state->io_irq == 0) { |
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skt->irq_state = 0; |
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irq_set_irq_type(skt->socket.pci_irq, IRQ_TYPE_NONE); |
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} |
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skt->cs_state = *state; |
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} |
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return ret; |
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} |
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/* soc_common_pcmcia_sock_init() |
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* ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
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* |
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* (Re-)Initialise the socket, turning on status interrupts |
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* and PCMCIA bus. This must wait for power to stabilise |
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* so that the card status signals report correctly. |
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* |
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* Returns: 0 |
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*/ |
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static int soc_common_pcmcia_sock_init(struct pcmcia_socket *sock) |
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{ |
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struct soc_pcmcia_socket *skt = to_soc_pcmcia_socket(sock); |
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debug(skt, 2, "initializing socket\n"); |
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if (skt->ops->socket_init) |
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skt->ops->socket_init(skt); |
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soc_pcmcia_hw_enable(skt); |
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return 0; |
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} |
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/* |
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* soc_common_pcmcia_suspend() |
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* ^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
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* |
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* Remove power on the socket, disable IRQs from the card. |
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* Turn off status interrupts, and disable the PCMCIA bus. |
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* |
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* Returns: 0 |
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*/ |
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static int soc_common_pcmcia_suspend(struct pcmcia_socket *sock) |
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{ |
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struct soc_pcmcia_socket *skt = to_soc_pcmcia_socket(sock); |
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debug(skt, 2, "suspending socket\n"); |
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soc_pcmcia_hw_disable(skt); |
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if (skt->ops->socket_suspend) |
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skt->ops->socket_suspend(skt); |
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return 0; |
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} |
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static DEFINE_SPINLOCK(status_lock); |
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static void soc_common_check_status(struct soc_pcmcia_socket *skt) |
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{ |
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unsigned int events; |
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debug(skt, 4, "entering PCMCIA monitoring thread\n"); |
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do { |
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unsigned int status; |
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unsigned long flags; |
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status = soc_common_pcmcia_skt_state(skt); |
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spin_lock_irqsave(&status_lock, flags); |
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events = (status ^ skt->status) & skt->cs_state.csc_mask; |
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skt->status = status; |
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spin_unlock_irqrestore(&status_lock, flags); |
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debug(skt, 4, "events: %s%s%s%s%s%s\n", |
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events == 0 ? "<NONE>" : "", |
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events & SS_DETECT ? "DETECT " : "", |
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events & SS_READY ? "READY " : "", |
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events & SS_BATDEAD ? "BATDEAD " : "", |
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events & SS_BATWARN ? "BATWARN " : "", |
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events & SS_STSCHG ? "STSCHG " : ""); |
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if (events) |
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pcmcia_parse_events(&skt->socket, events); |
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} while (events); |
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} |
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/* Let's poll for events in addition to IRQs since IRQ only is unreliable... */ |
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static void soc_common_pcmcia_poll_event(struct timer_list *t) |
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{ |
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struct soc_pcmcia_socket *skt = from_timer(skt, t, poll_timer); |
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debug(skt, 4, "polling for events\n"); |
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mod_timer(&skt->poll_timer, jiffies + SOC_PCMCIA_POLL_PERIOD); |
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soc_common_check_status(skt); |
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} |
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/* |
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* Service routine for socket driver interrupts (requested by the |
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* low-level PCMCIA init() operation via soc_common_pcmcia_thread()). |
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* The actual interrupt-servicing work is performed by |
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* soc_common_pcmcia_thread(), largely because the Card Services event- |
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* handling code performs scheduling operations which cannot be |
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* executed from within an interrupt context. |
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*/ |
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static irqreturn_t soc_common_pcmcia_interrupt(int irq, void *dev) |
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{ |
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struct soc_pcmcia_socket *skt = dev; |
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debug(skt, 3, "servicing IRQ %d\n", irq); |
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soc_common_check_status(skt); |
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return IRQ_HANDLED; |
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} |
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/* |
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* Implements the get_status() operation for the in-kernel PCMCIA |
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* service (formerly SS_GetStatus in Card Services). Essentially just |
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* fills in bits in `status' according to internal driver state or |
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* the value of the voltage detect chipselect register. |
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* |
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* As a debugging note, during card startup, the PCMCIA core issues |
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* three set_socket() commands in a row the first with RESET deasserted, |
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* the second with RESET asserted, and the last with RESET deasserted |
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* again. Following the third set_socket(), a get_status() command will |
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* be issued. The kernel is looking for the SS_READY flag (see |
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* setup_socket(), reset_socket(), and unreset_socket() in cs.c). |
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* |
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* Returns: 0 |
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*/ |
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static int |
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soc_common_pcmcia_get_status(struct pcmcia_socket *sock, unsigned int *status) |
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{ |
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struct soc_pcmcia_socket *skt = to_soc_pcmcia_socket(sock); |
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skt->status = soc_common_pcmcia_skt_state(skt); |
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*status = skt->status; |
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return 0; |
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} |
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/* |
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* Implements the set_socket() operation for the in-kernel PCMCIA |
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* service (formerly SS_SetSocket in Card Services). We more or |
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* less punt all of this work and let the kernel handle the details |
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* of power configuration, reset, &c. We also record the value of |
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* `state' in order to regurgitate it to the PCMCIA core later. |
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*/ |
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static int soc_common_pcmcia_set_socket( |
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struct pcmcia_socket *sock, socket_state_t *state) |
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{ |
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struct soc_pcmcia_socket *skt = to_soc_pcmcia_socket(sock); |
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|
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debug(skt, 2, "mask: %s%s%s%s%s%s flags: %s%s%s%s%s%s Vcc %d Vpp %d irq %d\n", |
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(state->csc_mask == 0) ? "<NONE> " : "", |
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(state->csc_mask & SS_DETECT) ? "DETECT " : "", |
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(state->csc_mask & SS_READY) ? "READY " : "", |
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(state->csc_mask & SS_BATDEAD) ? "BATDEAD " : "", |
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(state->csc_mask & SS_BATWARN) ? "BATWARN " : "", |
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(state->csc_mask & SS_STSCHG) ? "STSCHG " : "", |
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(state->flags == 0) ? "<NONE> " : "", |
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(state->flags & SS_PWR_AUTO) ? "PWR_AUTO " : "", |
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(state->flags & SS_IOCARD) ? "IOCARD " : "", |
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(state->flags & SS_RESET) ? "RESET " : "", |
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(state->flags & SS_SPKR_ENA) ? "SPKR_ENA " : "", |
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(state->flags & SS_OUTPUT_ENA) ? "OUTPUT_ENA " : "", |
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state->Vcc, state->Vpp, state->io_irq); |
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|
|
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 <[email protected]>"); |
|
MODULE_DESCRIPTION("Linux PCMCIA Card Services: Common SoC support"); |
|
MODULE_LICENSE("Dual MPL/GPL");
|
|
|