[ARM] 5294/1: Trizeps4 PCMCIA support
Support for Trizeps4 SOM PCMCIA
with ConXS or other baseboards.
with double GPIO-free fixed (sorry!)
replaces 5279/1
Signed-off-by: Jurgen Schindele <linux@schindele.name>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/drivers/pcmcia/pxa2xx_trizeps4.c b/drivers/pcmcia/pxa2xx_trizeps4.c
new file mode 100644
index 0000000..3a9ab4a
--- /dev/null
+++ b/drivers/pcmcia/pxa2xx_trizeps4.c
@@ -0,0 +1,257 @@
+/*
+ * linux/drivers/pcmcia/pxa2xx_trizeps4.c
+ *
+ * TRIZEPS PCMCIA specific routines.
+ *
+ * Author: Jürgen Schindele
+ * Created: 20 02, 2006
+ * Copyright: Jürgen Schindele
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/gpio.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+
+#include <asm/mach-types.h>
+#include <asm/irq.h>
+
+#include <mach/hardware.h>
+#include <mach/pxa-regs.h>
+#include <mach/trizeps4.h>
+
+#include "soc_common.h"
+
+extern void board_pcmcia_power(int power);
+
+static struct pcmcia_irqs irqs[] = {
+ { 0, IRQ_GPIO(GPIO_PCD), "cs0_cd" }
+ /* on other baseboards we can have more inputs */
+};
+
+static int trizeps_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
+{
+ int ret, i;
+ /* we dont have voltage/card/ready detection
+ * so we dont need interrupts for it
+ */
+ switch (skt->nr) {
+ case 0:
+ if (gpio_request(GPIO_PRDY, "cf_irq") < 0) {
+ pr_err("%s: sock %d unable to request gpio %d\n", __func__,
+ skt->nr, GPIO_PRDY);
+ return -EBUSY;
+ }
+ if (gpio_direction_input(GPIO_PRDY) < 0) {
+ pr_err("%s: sock %d unable to set input gpio %d\n", __func__,
+ skt->nr, GPIO_PRDY);
+ gpio_free(GPIO_PRDY);
+ return -EINVAL;
+ }
+ skt->irq = IRQ_GPIO(GPIO_PRDY);
+ break;
+
+#ifndef CONFIG_MACH_TRIZEPS_CONXS
+ case 1:
+#endif
+ default:
+ break;
+ }
+ /* release the reset of this card */
+ pr_debug("%s: sock %d irq %d\n", __func__, skt->nr, skt->irq);
+
+ /* supplementory irqs for the socket */
+ for (i = 0; i < ARRAY_SIZE(irqs); i++) {
+ if (irqs[i].sock != skt->nr)
+ continue;
+ if (gpio_request(IRQ_TO_GPIO(irqs[i].irq), irqs[i].str) < 0) {
+ pr_err("%s: sock %d unable to request gpio %d\n",
+ __func__, skt->nr, IRQ_TO_GPIO(irqs[i].irq));
+ ret = -EBUSY;
+ goto error;
+ }
+ if (gpio_direction_input(IRQ_TO_GPIO(irqs[i].irq)) < 0) {
+ pr_err("%s: sock %d unable to set input gpio %d\n",
+ __func__, skt->nr, IRQ_TO_GPIO(irqs[i].irq));
+ ret = -EINVAL;
+ goto error;
+ }
+ }
+ return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
+
+error:
+ for (; i >= 0; i--) {
+ gpio_free(IRQ_TO_GPIO(irqs[i].irq));
+ }
+ return (ret);
+}
+
+static void trizeps_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
+{
+ int i;
+ /* free allocated gpio's */
+ gpio_free(GPIO_PRDY);
+ for (i = 0; i < ARRAY_SIZE(irqs); i++)
+ gpio_free(IRQ_TO_GPIO(irqs[i].irq));
+}
+
+static unsigned long trizeps_pcmcia_status[2];
+
+static void trizeps_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
+ struct pcmcia_state *state)
+{
+ unsigned short status = 0, change;
+ status = CFSR_readw();
+ change = (status ^ trizeps_pcmcia_status[skt->nr]) &
+ ConXS_CFSR_BVD_MASK;
+ if (change) {
+ trizeps_pcmcia_status[skt->nr] = status;
+ if (status & ConXS_CFSR_BVD1) {
+ /* enable_irq empty */
+ } else {
+ /* disable_irq empty */
+ }
+ }
+
+ switch (skt->nr) {
+ case 0:
+ /* just fill in fix states */
+ state->detect = gpio_get_value(GPIO_PCD) ? 0 : 1;
+ state->ready = gpio_get_value(GPIO_PRDY) ? 1 : 0;
+ state->bvd1 = (status & ConXS_CFSR_BVD1) ? 1 : 0;
+ state->bvd2 = (status & ConXS_CFSR_BVD2) ? 1 : 0;
+ state->vs_3v = (status & ConXS_CFSR_VS1) ? 0 : 1;
+ state->vs_Xv = (status & ConXS_CFSR_VS2) ? 0 : 1;
+ state->wrprot = 0; /* not available */
+ break;
+
+#ifndef CONFIG_MACH_TRIZEPS_CONXS
+ /* on ConXS we only have one slot. Second is inactive */
+ case 1:
+ state->detect = 0;
+ state->ready = 0;
+ state->bvd1 = 0;
+ state->bvd2 = 0;
+ state->vs_3v = 0;
+ state->vs_Xv = 0;
+ state->wrprot = 0;
+ break;
+
+#endif
+ }
+}
+
+static int trizeps_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
+ const socket_state_t *state)
+{
+ int ret = 0;
+ unsigned short power = 0;
+
+ /* we do nothing here just check a bit */
+ switch (state->Vcc) {
+ case 0: power &= 0xfc; break;
+ case 33: power |= ConXS_BCR_S0_VCC_3V3; break;
+ case 50:
+ pr_err("%s(): Vcc 5V not supported in socket\n", __func__);
+ break;
+ default:
+ pr_err("%s(): bad Vcc %u\n", __func__, state->Vcc);
+ ret = -1;
+ }
+
+ switch (state->Vpp) {
+ case 0: power &= 0xf3; break;
+ case 33: power |= ConXS_BCR_S0_VPP_3V3; break;
+ case 120:
+ pr_err("%s(): Vpp 12V not supported in socket\n", __func__);
+ break;
+ default:
+ if (state->Vpp != state->Vcc) {
+ pr_err("%s(): bad Vpp %u\n", __func__, state->Vpp);
+ ret = -1;
+ }
+ }
+
+ switch (skt->nr) {
+ case 0: /* we only have 3.3V */
+ board_pcmcia_power(power);
+ break;
+
+#ifndef CONFIG_MACH_TRIZEPS_CONXS
+ /* on ConXS we only have one slot. Second is inactive */
+ case 1:
+#endif
+ default:
+ break;
+ }
+
+ return ret;
+}
+
+static void trizeps_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
+{
+ /* default is on */
+ board_pcmcia_power(0x9);
+}
+
+static void trizeps_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
+{
+ board_pcmcia_power(0x0);
+}
+
+static struct pcmcia_low_level trizeps_pcmcia_ops = {
+ .owner = THIS_MODULE,
+ .hw_init = trizeps_pcmcia_hw_init,
+ .hw_shutdown = trizeps_pcmcia_hw_shutdown,
+ .socket_state = trizeps_pcmcia_socket_state,
+ .configure_socket = trizeps_pcmcia_configure_socket,
+ .socket_init = trizeps_pcmcia_socket_init,
+ .socket_suspend = trizeps_pcmcia_socket_suspend,
+#ifdef CONFIG_MACH_TRIZEPS_CONXS
+ .nr = 1,
+#else
+ .nr = 2,
+#endif
+ .first = 0,
+};
+
+static struct platform_device *trizeps_pcmcia_device;
+
+static int __init trizeps_pcmcia_init(void)
+{
+ int ret;
+
+ trizeps_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
+ if (!trizeps_pcmcia_device)
+ return -ENOMEM;
+
+ ret = platform_device_add_data(trizeps_pcmcia_device,
+ &trizeps_pcmcia_ops, sizeof(trizeps_pcmcia_ops));
+
+ if (ret == 0)
+ ret = platform_device_add(trizeps_pcmcia_device);
+
+ if (ret)
+ platform_device_put(trizeps_pcmcia_device);
+
+ return ret;
+}
+
+static void __exit trizeps_pcmcia_exit(void)
+{
+ int i;
+ platform_device_unregister(trizeps_pcmcia_device);
+}
+
+fs_initcall(trizeps_pcmcia_init);
+module_exit(trizeps_pcmcia_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Juergen Schindele");
+MODULE_ALIAS("platform:pxa2xx-pcmcia");