[ARM] pxa/balloon3: PCMCIA Support
This driver adds support for the on-board CF socket.
Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
diff --git a/drivers/pcmcia/Kconfig b/drivers/pcmcia/Kconfig
index d0f5ad3..ef2f659 100644
--- a/drivers/pcmcia/Kconfig
+++ b/drivers/pcmcia/Kconfig
@@ -215,7 +215,7 @@
depends on (ARCH_LUBBOCK || MACH_MAINSTONE || PXA_SHARPSL \
|| MACH_ARMCORE || ARCH_PXA_PALM || TRIZEPS_PCMCIA \
|| ARCOM_PCMCIA || ARCH_PXA_ESERIES || MACH_STARGATE2 \
- || MACH_VPAC270)
+ || MACH_VPAC270 || MACH_BALLOON3)
select PCMCIA_SOC_COMMON
help
Say Y here to include support for the PXA2xx PCMCIA controller
diff --git a/drivers/pcmcia/Makefile b/drivers/pcmcia/Makefile
index d006e8be..6a60773 100644
--- a/drivers/pcmcia/Makefile
+++ b/drivers/pcmcia/Makefile
@@ -70,6 +70,7 @@
pxa2xx-obj-$(CONFIG_MACH_E740) += pxa2xx_e740.o
pxa2xx-obj-$(CONFIG_MACH_STARGATE2) += pxa2xx_stargate2.o
pxa2xx-obj-$(CONFIG_MACH_VPAC270) += pxa2xx_vpac270.o
+pxa2xx-obj-$(CONFIG_MACH_BALLOON3) += pxa2xx_balloon3.o
obj-$(CONFIG_PCMCIA_PXA2XX) += pxa2xx_base.o $(pxa2xx-obj-y)
diff --git a/drivers/pcmcia/pxa2xx_balloon3.c b/drivers/pcmcia/pxa2xx_balloon3.c
new file mode 100644
index 0000000..dbbdd00
--- /dev/null
+++ b/drivers/pcmcia/pxa2xx_balloon3.c
@@ -0,0 +1,158 @@
+/*
+ * linux/drivers/pcmcia/pxa2xx_balloon3.c
+ *
+ * Balloon3 PCMCIA specific routines.
+ *
+ * Author: Nick Bane
+ * Created: June, 2006
+ * Copyright: Toby Churchill Ltd
+ * Derived from pxa2xx_mainstone.c, by Nico Pitre
+ *
+ * Various modification by Marek Vasut <marek.vasut@gmail.com>
+ *
+ * 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/gpio.h>
+#include <linux/errno.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/irq.h>
+#include <linux/io.h>
+
+#include <mach/balloon3.h>
+
+#include "soc_common.h"
+
+/*
+ * These are a list of interrupt sources that provokes a polled
+ * check of status
+ */
+static struct pcmcia_irqs irqs[] = {
+ { 0, BALLOON3_S0_CD_IRQ, "PCMCIA0 CD" },
+ { 0, BALLOON3_BP_NSTSCHG_IRQ, "PCMCIA0 STSCHG" },
+};
+
+static int balloon3_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
+{
+ uint16_t ver;
+ int ret;
+ static void __iomem *fpga_ver;
+
+ ver = __raw_readw(BALLOON3_FPGA_VER);
+ if (ver > 0x0201)
+ pr_warn("The FPGA code, version 0x%04x, is newer than rel-0.3. "
+ "PCMCIA/CF support might be broken in this version!",
+ ver);
+
+ skt->socket.pci_irq = BALLOON3_BP_CF_NRDY_IRQ;
+ return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
+}
+
+static void balloon3_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
+{
+ soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
+}
+
+static unsigned long balloon3_pcmcia_status[2] = {
+ BALLOON3_CF_nSTSCHG_BVD1,
+ BALLOON3_CF_nSTSCHG_BVD1
+};
+
+static void balloon3_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
+ struct pcmcia_state *state)
+{
+ uint16_t status;
+ int flip;
+
+ /* This actually reads the STATUS register */
+ status = __raw_readw(BALLOON3_CF_STATUS_REG);
+ flip = (status ^ balloon3_pcmcia_status[skt->nr])
+ & BALLOON3_CF_nSTSCHG_BVD1;
+ /*
+ * Workaround for STSCHG which can't be deasserted:
+ * We therefore disable/enable corresponding IRQs
+ * as needed to avoid IRQ locks.
+ */
+ if (flip) {
+ balloon3_pcmcia_status[skt->nr] = status;
+ if (status & BALLOON3_CF_nSTSCHG_BVD1)
+ enable_irq(BALLOON3_BP_NSTSCHG_IRQ);
+ else
+ disable_irq(BALLOON3_BP_NSTSCHG_IRQ);
+ }
+
+ state->detect = !gpio_get_value(BALLOON3_GPIO_S0_CD);
+ state->ready = !!(status & BALLOON3_CF_nIRQ);
+ state->bvd1 = !!(status & BALLOON3_CF_nSTSCHG_BVD1);
+ state->bvd2 = 0; /* not available */
+ state->vs_3v = 1; /* Always true its a CF card */
+ state->vs_Xv = 0; /* not available */
+ state->wrprot = 0; /* not available */
+}
+
+static int balloon3_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
+ const socket_state_t *state)
+{
+ __raw_writew((state->flags & SS_RESET) ? BALLOON3_CF_RESET : 0,
+ BALLOON3_CF_CONTROL_REG);
+ return 0;
+}
+
+static void balloon3_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
+{
+}
+
+static void balloon3_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
+{
+}
+
+static struct pcmcia_low_level balloon3_pcmcia_ops = {
+ .owner = THIS_MODULE,
+ .hw_init = balloon3_pcmcia_hw_init,
+ .hw_shutdown = balloon3_pcmcia_hw_shutdown,
+ .socket_state = balloon3_pcmcia_socket_state,
+ .configure_socket = balloon3_pcmcia_configure_socket,
+ .socket_init = balloon3_pcmcia_socket_init,
+ .socket_suspend = balloon3_pcmcia_socket_suspend,
+ .first = 0,
+ .nr = 1,
+};
+
+static struct platform_device *balloon3_pcmcia_device;
+
+static int __init balloon3_pcmcia_init(void)
+{
+ int ret;
+
+ balloon3_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
+ if (!balloon3_pcmcia_device)
+ return -ENOMEM;
+
+ ret = platform_device_add_data(balloon3_pcmcia_device,
+ &balloon3_pcmcia_ops, sizeof(balloon3_pcmcia_ops));
+
+ if (!ret)
+ ret = platform_device_add(balloon3_pcmcia_device);
+
+ if (ret)
+ platform_device_put(balloon3_pcmcia_device);
+
+ return ret;
+}
+
+static void __exit balloon3_pcmcia_exit(void)
+{
+ platform_device_unregister(balloon3_pcmcia_device);
+}
+
+module_init(balloon3_pcmcia_init);
+module_exit(balloon3_pcmcia_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Nick Bane <nick@cecomputing.co.uk>");
+MODULE_ALIAS("platform:pxa2xx-pcmcia");
+MODULE_DESCRIPTION("Balloon3 board CF/PCMCIA driver");
