File-copy from v4.4.100
This is the result of 'cp' from a linux-stable tree with the 'v4.4.100'
tag checked out (commit 26d6298789e695c9f627ce49a7bbd2286405798a) on
git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Please refer to that tree for all history prior to this point.
Change-Id: I8a9ee2aea93cd29c52c847d0ce33091a73ae6afe
diff --git a/drivers/pcmcia/pxa2xx_balloon3.c b/drivers/pcmcia/pxa2xx_balloon3.c
new file mode 100644
index 0000000..2ef576c
--- /dev/null
+++ b/drivers/pcmcia/pxa2xx_balloon3.c
@@ -0,0 +1,140 @@
+/*
+ * 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 <asm/mach-types.h>
+
+#include "soc_common.h"
+
+static int balloon3_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
+{
+ uint16_t ver;
+
+ ver = __raw_readw(BALLOON3_FPGA_VER);
+ if (ver < 0x4f08)
+ pr_warn("The FPGA code, version 0x%04x, is too old. "
+ "PCMCIA/CF support might be broken in this version!",
+ ver);
+
+ skt->socket.pci_irq = BALLOON3_BP_CF_NRDY_IRQ;
+ skt->stat[SOC_STAT_CD].gpio = BALLOON3_GPIO_S0_CD;
+ skt->stat[SOC_STAT_CD].name = "PCMCIA0 CD";
+ skt->stat[SOC_STAT_BVD1].irq = BALLOON3_BP_NSTSCHG_IRQ;
+ skt->stat[SOC_STAT_BVD1].name = "PCMCIA0 STSCHG";
+
+ return 0;
+}
+
+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->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 */
+}
+
+static int balloon3_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
+ const socket_state_t *state)
+{
+ __raw_writew(BALLOON3_CF_RESET, BALLOON3_CF_CONTROL_REG +
+ ((state->flags & SS_RESET) ?
+ BALLOON3_FPGA_SETnCLR : 0));
+ return 0;
+}
+
+static struct pcmcia_low_level balloon3_pcmcia_ops = {
+ .owner = THIS_MODULE,
+ .hw_init = balloon3_pcmcia_hw_init,
+ .socket_state = balloon3_pcmcia_socket_state,
+ .configure_socket = balloon3_pcmcia_configure_socket,
+ .first = 0,
+ .nr = 1,
+};
+
+static struct platform_device *balloon3_pcmcia_device;
+
+static int __init balloon3_pcmcia_init(void)
+{
+ int ret;
+
+ if (!machine_is_balloon3())
+ return -ENODEV;
+
+ 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");