From: Kamlakant Patel <kamlakant.patel@xxxxxxxxxxxx>
Add driver for the compact flash interface on Netlogic MIPS SoCs.
The code is based on platform pcmcia driver, but adds interrupt
handling code to ACK interrupts.
Signed-off-by: Kamlakant Patel <kamlakant.patel@xxxxxxxxxxxx>
Signed-off-by: Jayachandran C <jayachandranc@xxxxxxxxxxxxxxxxx>
---
drivers/ata/Kconfig | 9 ++
drivers/ata/Makefile | 1 +
drivers/ata/pata_xlr_pcmcia.c | 194 +++++++++++++++++++++++++++++++++++++++++
3 files changed, 204 insertions(+)
create mode 100644 drivers/ata/pata_xlr_pcmcia.c
diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
index 6bdedd7..ba4a734 100644
--- a/drivers/ata/Kconfig
+++ b/drivers/ata/Kconfig
@@ -870,6 +870,15 @@ config PATA_WINBOND_VLB
Support for the Winbond W83759A controller on Vesa Local Bus
systems.
+config PATA_XLR_PCMCIA
+ tristate "Netlogic XLR PATA PCMCIA/CompactFlash support"
+ depends on CPU_XLR
+ help
+ This option enables support for PCMCIA/CompactFlash driver for
+ Netlogic XLR SoCs.
+
+ If unsure, say N.
+
comment "Generic fallback / legacy drivers"
config PATA_ACPI
diff --git a/drivers/ata/Makefile b/drivers/ata/Makefile
index 6ece5b7..772d076 100644
--- a/drivers/ata/Makefile
+++ b/drivers/ata/Makefile
@@ -91,6 +91,7 @@ obj-$(CONFIG_PATA_OF_PLATFORM) += pata_of_platform.o
obj-$(CONFIG_PATA_RB532) += pata_rb532_cf.o
obj-$(CONFIG_PATA_RZ1000) += pata_rz1000.o
obj-$(CONFIG_PATA_SAMSUNG_CF) += pata_samsung_cf.o
+obj-$(CONFIG_PATA_XLR_PCMCIA) += pata_xlr_pcmcia.o
obj-$(CONFIG_PATA_PXA) += pata_pxa.o
diff --git a/drivers/ata/pata_xlr_pcmcia.c b/drivers/ata/pata_xlr_pcmcia.c
new file mode 100644
index 0000000..84de6d8
--- /dev/null
+++ b/drivers/ata/pata_xlr_pcmcia.c
@@ -0,0 +1,194 @@
+/*
+ * Copyright (c) 2012 Broadcom Corporation
+ *
+ * Based on Generic platform device PATA driver
+ * Copyright (C) 2006 - 2007 Paul Mundt
+ *
+ * Based on pata_pcmcia:
+ *
+ * Copyright 2005-2006 Red Hat Inc, all rights reserved.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/libata.h>
+#include <linux/platform_device.h>
+#include <linux/ata_platform.h>
+
+#define DRV_NAME "pata_xlr_platform"
+#define DRV_VERSION "1.2"
+
+#define PATA_PCMCIA_BASE 0x1f0
+#define PATA_PCMCIA_STATUS 0x1f7
+#define PATA_PCMCIA_CTL 0x3f6
+
+/*
+ * Provide our own set_mode() as we don't want to change anything that has
+ * already been configured..
+ */
+static int xlr_pata_platform_set_mode(struct ata_link *link,
+ struct ata_device **unused)
+{
+ struct ata_device *dev;
+
+ ata_for_each_dev(dev, link, ENABLED) {
+ /* We don't really care */
+ dev->pio_mode = dev->xfer_mode = XFER_PIO_0;
+ dev->xfer_shift = ATA_SHIFT_PIO;
+ dev->flags |= ATA_DFLAG_PIO;
+ ata_dev_info(dev, "configured for PIO\n");
+ }
+ return 0;
+}
+
+static struct scsi_host_template pata_platform_sht = {
+ ATA_PIO_SHT(DRV_NAME),
+};
+
+void xlr_pata_irq_clear(struct ata_port *port)
+{
+ unsigned int reg;
+
+ reg = readl(port->private_data);
+ writel(reg, port->private_data);
+}
+
+bool xlr_pata_irq_check(struct ata_port *port)
+{
+ unsigned int reg;
+
+ reg = readl(port->private_data);
+
+ return (reg != 0);
+}
+
+static struct ata_port_operations pata_platform_port_ops = {
+ .inherits = &ata_sff_port_ops,
+ .sff_data_xfer = ata_sff_data_xfer_noirq,
+ .cable_detect = ata_cable_unknown,
+ .set_mode = xlr_pata_platform_set_mode,
+ .sff_irq_check = xlr_pata_irq_check,
+ .sff_check_status = ata_sff_check_status,
+ .sff_irq_clear = xlr_pata_irq_clear,
+};
+
+int xlr_pata_platform_remove(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct ata_host *host = dev_get_drvdata(dev);
+
+ ata_host_detach(host);
+
+ return 0;
+}
+
+static int __devinit xlr_pata_platform_probe(struct platform_device *pdev)
+{
+ struct ata_host *host;
+ struct ata_port *ap;
+ struct ata_ioports *ioaddr;
+
+ struct resource *io_res;
+ struct resource *irq_res;
+ struct resource *ack_res;
+
+ struct device *dev = &pdev->dev;
+ int irq = 0;
+ int irq_flags = 0;
+
+
+ /*
+ * Simple resource validation ..
+ */
+ if (pdev->num_resources != 3) {
+ dev_err(&pdev->dev, "invalid number of resources\n");
+ return -EINVAL;
+ }
+
+ /*
+ * Get the I/O base first
+ */
+ io_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (unlikely(io_res == NULL))
+ return -EINVAL;
+
+ ack_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+ if (unlikely(ack_res == NULL))
+ return -EINVAL;
+
+ /*
+ * And the IRQ
+ */
+ irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+
+ if (irq_res && irq_res->start > 0) {
+ irq = irq_res->start;
+ irq_flags = irq_res->flags;
+ }
+
+ host = ata_host_alloc(dev, 1);
+ if (!host)
+ return -ENOMEM;
+
+ ap = host->ports[0];
+ ap->ops = &pata_platform_port_ops;
+ ap->private_data = ioremap(ack_res->start, resource_size(ack_res));
+ ap->flags |= ATA_FLAG_SLAVE_POSS;
+
+ /*
+ * Use polling mode if there's no IRQ
+ */
+ if (!irq) {
+ ap->flags |= ATA_FLAG_PIO_POLLING;
+ ata_port_desc(ap, "no IRQ, using PIO polling");
+ }
+
+ /*
+ * Handle the MMIO case
+ */
+ ioaddr = &ap->ioaddr;
+ ioaddr->data_addr = devm_ioremap(dev, io_res->start,
+ resource_size(io_res));
+ ioaddr->cmd_addr = ioaddr->data_addr + PATA_PCMCIA_BASE;
+ ioaddr->altstatus_addr = ioaddr->data_addr + PATA_PCMCIA_STATUS;
+ ioaddr->ctl_addr = ioaddr->data_addr + PATA_PCMCIA_CTL;
+
+ /* Fixup the port shift for platforms that need it */
+ ioaddr->data_addr = ioaddr->cmd_addr + (ATA_REG_DATA);
+ ioaddr->error_addr = ioaddr->cmd_addr + (ATA_REG_ERR);
+ ioaddr->feature_addr = ioaddr->cmd_addr + (ATA_REG_FEATURE);
+ ioaddr->nsect_addr = ioaddr->cmd_addr + (ATA_REG_NSECT);
+ ioaddr->lbal_addr = ioaddr->cmd_addr + (ATA_REG_LBAL);
+ ioaddr->lbam_addr = ioaddr->cmd_addr + (ATA_REG_LBAM);
+ ioaddr->lbah_addr = ioaddr->cmd_addr + (ATA_REG_LBAH);
+ ioaddr->device_addr = ioaddr->cmd_addr + (ATA_REG_DEVICE);
+ ioaddr->status_addr = ioaddr->cmd_addr + (ATA_REG_STATUS);
+ ioaddr->command_addr = ioaddr->cmd_addr + (ATA_REG_CMD);
+
+ ata_port_desc(ap, "%s cmd 0x%x ctl 0x%x", "mmio",
+ (unsigned int)ap->ioaddr.cmd_addr,
+ (unsigned int)ap->ioaddr.ctl_addr);
+
+ /* activate */
+ return ata_host_activate(host, irq, irq ? ata_sff_interrupt : NULL,
+ irq_flags, &pata_platform_sht);
+}
+
+static struct platform_driver pata_platform_driver = {
+ .probe = xlr_pata_platform_probe,
+ .remove = __devexit_p(xlr_pata_platform_remove),
+ .driver = {
+ .name = DRV_NAME,
+ .owner = THIS_MODULE,
+ },
+};
+module_platform_driver(pata_platform_driver);
+
+MODULE_AUTHOR("Kamlakant Patel <kamlakant.patel@xxxxxxxxxxxx>");
+MODULE_DESCRIPTION("XLR/XLS SoC PCMCIA/CF driver");
+MODULE_LICENSE("GPL v2");
+MODULE_VERSION(DRV_VERSION);
+MODULE_ALIAS("platform:" DRV_NAME);
--
1.7.9.5
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