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@@ -0,0 +1,158 @@
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+/*
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+ * linux/drivers/pcmcia/pxa2xx_balloon3.c
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+ *
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+ * Balloon3 PCMCIA specific routines.
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+ *
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+ * Author: Nick Bane
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+ * Created: June, 2006
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+ * Copyright: Toby Churchill Ltd
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+ * Derived from pxa2xx_mainstone.c, by Nico Pitre
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+ *
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+ * Various modification by Marek Vasut <marek.vasut@gmail.com>
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+ *
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License version 2 as
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+ * published by the Free Software Foundation.
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+ */
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+
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+#include <linux/module.h>
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+#include <linux/gpio.h>
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+#include <linux/errno.h>
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+#include <linux/interrupt.h>
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+#include <linux/platform_device.h>
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+#include <linux/irq.h>
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+#include <linux/io.h>
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+
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+#include <mach/balloon3.h>
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+
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+#include "soc_common.h"
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+
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+/*
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+ * These are a list of interrupt sources that provokes a polled
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+ * check of status
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+ */
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+static struct pcmcia_irqs irqs[] = {
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+ { 0, BALLOON3_S0_CD_IRQ, "PCMCIA0 CD" },
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+ { 0, BALLOON3_BP_NSTSCHG_IRQ, "PCMCIA0 STSCHG" },
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+};
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+
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+static int balloon3_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
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+{
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+ uint16_t ver;
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+ int ret;
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+ static void __iomem *fpga_ver;
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+
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+ ver = __raw_readw(BALLOON3_FPGA_VER);
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+ if (ver > 0x0201)
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+ pr_warn("The FPGA code, version 0x%04x, is newer than rel-0.3. "
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+ "PCMCIA/CF support might be broken in this version!",
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+ ver);
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+
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+ skt->socket.pci_irq = BALLOON3_BP_CF_NRDY_IRQ;
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+ return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
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+}
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+
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+static void balloon3_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
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+{
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+ soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
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+}
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+
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+static unsigned long balloon3_pcmcia_status[2] = {
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+ BALLOON3_CF_nSTSCHG_BVD1,
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+ BALLOON3_CF_nSTSCHG_BVD1
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+};
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+
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+static void balloon3_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
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+ struct pcmcia_state *state)
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+{
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+ uint16_t status;
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+ int flip;
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+
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+ /* This actually reads the STATUS register */
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+ status = __raw_readw(BALLOON3_CF_STATUS_REG);
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+ flip = (status ^ balloon3_pcmcia_status[skt->nr])
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+ & BALLOON3_CF_nSTSCHG_BVD1;
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+ /*
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+ * Workaround for STSCHG which can't be deasserted:
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+ * We therefore disable/enable corresponding IRQs
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+ * as needed to avoid IRQ locks.
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+ */
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+ if (flip) {
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+ balloon3_pcmcia_status[skt->nr] = status;
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+ if (status & BALLOON3_CF_nSTSCHG_BVD1)
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+ enable_irq(BALLOON3_BP_NSTSCHG_IRQ);
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+ else
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+ disable_irq(BALLOON3_BP_NSTSCHG_IRQ);
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+ }
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+
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+ state->detect = !gpio_get_value(BALLOON3_GPIO_S0_CD);
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+ state->ready = !!(status & BALLOON3_CF_nIRQ);
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+ state->bvd1 = !!(status & BALLOON3_CF_nSTSCHG_BVD1);
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+ state->bvd2 = 0; /* not available */
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+ state->vs_3v = 1; /* Always true its a CF card */
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+ state->vs_Xv = 0; /* not available */
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+ state->wrprot = 0; /* not available */
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+}
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+
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+static int balloon3_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
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+ const socket_state_t *state)
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+{
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+ __raw_writew((state->flags & SS_RESET) ? BALLOON3_CF_RESET : 0,
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+ BALLOON3_CF_CONTROL_REG);
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+ return 0;
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+}
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+
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+static void balloon3_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
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+{
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+}
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+
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+static void balloon3_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
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+{
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+}
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+
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+static struct pcmcia_low_level balloon3_pcmcia_ops = {
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+ .owner = THIS_MODULE,
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+ .hw_init = balloon3_pcmcia_hw_init,
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+ .hw_shutdown = balloon3_pcmcia_hw_shutdown,
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+ .socket_state = balloon3_pcmcia_socket_state,
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+ .configure_socket = balloon3_pcmcia_configure_socket,
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+ .socket_init = balloon3_pcmcia_socket_init,
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+ .socket_suspend = balloon3_pcmcia_socket_suspend,
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+ .first = 0,
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+ .nr = 1,
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+};
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+
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+static struct platform_device *balloon3_pcmcia_device;
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+
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+static int __init balloon3_pcmcia_init(void)
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+{
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+ int ret;
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+
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+ balloon3_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
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+ if (!balloon3_pcmcia_device)
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+ return -ENOMEM;
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+
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+ ret = platform_device_add_data(balloon3_pcmcia_device,
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+ &balloon3_pcmcia_ops, sizeof(balloon3_pcmcia_ops));
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+
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+ if (!ret)
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+ ret = platform_device_add(balloon3_pcmcia_device);
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+
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+ if (ret)
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+ platform_device_put(balloon3_pcmcia_device);
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+
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+ return ret;
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+}
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+
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+static void __exit balloon3_pcmcia_exit(void)
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+{
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+ platform_device_unregister(balloon3_pcmcia_device);
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+}
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+
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+module_init(balloon3_pcmcia_init);
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+module_exit(balloon3_pcmcia_exit);
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+
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+MODULE_LICENSE("GPL");
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+MODULE_AUTHOR("Nick Bane <nick@cecomputing.co.uk>");
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+MODULE_ALIAS("platform:pxa2xx-pcmcia");
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+MODULE_DESCRIPTION("Balloon3 board CF/PCMCIA driver");
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Marek Vasut