8250_pci: add support for National Instruments 843x RS232 devices

This implements basic support for all 843x RS232 devices, but does not
add DMA support.  This means that sustained data transfers at high baud
rates may not be possible on multiple ports simultaneously.

Signed-off-by: Shawn Bohrer <shawn.bohrer@ni.com>
Signed-off-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 193 insertions, 0 deletions

diff --git a/drivers/serial/8250_pci.c b/drivers/serial/8250_pci.c
index 533f82025ad..2f570c761fa 100644
--- a/drivers/serial/8250_pci.c
+++ b/drivers/serial/8250_pci.c
@@ -306,6 +306,36 @@ static void __devexit pci_plx9050_exit(struct pci_dev *dev)
 	}
 }
 
+/* MITE registers */
+#define MITE_IOWBSR1	0xc4
+#define MITE_IOWCR1	0xf4
+#define MITE_LCIMR1	0x08
+#define MITE_LCIMR2	0x10
+
+#define MITE_LCIMR2_CLR_CPU_IE	(1 << 30)
+
+static void __devexit pci_ni8430_exit(struct pci_dev *dev)
+{
+	void __iomem *p;
+	unsigned long base, len;
+	unsigned int bar = 0;
+
+	if ((pci_resource_flags(dev, bar) & IORESOURCE_MEM) == 0) {
+		moan_device("no memory in bar", dev);
+		return;
+	}
+
+	base = pci_resource_start(dev, bar);
+	len =  pci_resource_len(dev, bar);
+	p = ioremap_nocache(base, len);
+	if (p == NULL)
+		return;
+
+	/* Disable the CPU Interrupt */
+	writel(MITE_LCIMR2_CLR_CPU_IE, p + MITE_LCIMR2);
+	iounmap(p);
+}
+
 /* SBS Technologies Inc. PMC-OCTPRO and P-OCTAL cards */
 static int
 sbs_setup(struct serial_private *priv, const struct pciserial_board *board,
@@ -597,6 +627,82 @@ static int pci_xircom_init(struct pci_dev *dev)
 	return 0;
 }
 
+#define MITE_IOWBSR1_WSIZE	0xa
+#define MITE_IOWBSR1_WIN_OFFSET	0x800
+#define MITE_IOWBSR1_WENAB	(1 << 7)
+#define MITE_LCIMR1_IO_IE_0	(1 << 24)
+#define MITE_LCIMR2_SET_CPU_IE	(1 << 31)
+#define MITE_IOWCR1_RAMSEL_MASK	0xfffffffe
+
+static int pci_ni8430_init(struct pci_dev *dev)
+{
+	void __iomem *p;
+	unsigned long base, len;
+	u32 device_window;
+	unsigned int bar = 0;
+
+	if ((pci_resource_flags(dev, bar) & IORESOURCE_MEM) == 0) {
+		moan_device("no memory in bar", dev);
+		return 0;
+	}
+
+	base = pci_resource_start(dev, bar);
+	len =  pci_resource_len(dev, bar);
+	p = ioremap_nocache(base, len);
+	if (p == NULL)
+		return -ENOMEM;
+
+	/* Set device window address and size in BAR0 */
+	device_window = ((base + MITE_IOWBSR1_WIN_OFFSET) & 0xffffff00)
+	                | MITE_IOWBSR1_WENAB | MITE_IOWBSR1_WSIZE;
+	writel(device_window, p + MITE_IOWBSR1);
+
+	/* Set window access to go to RAMSEL IO address space */
+	writel((readl(p + MITE_IOWCR1) & MITE_IOWCR1_RAMSEL_MASK),
+	       p + MITE_IOWCR1);
+
+	/* Enable IO Bus Interrupt 0 */
+	writel(MITE_LCIMR1_IO_IE_0, p + MITE_LCIMR1);
+
+	/* Enable CPU Interrupt */
+	writel(MITE_LCIMR2_SET_CPU_IE, p + MITE_LCIMR2);
+
+	iounmap(p);
+	return 0;
+}
+
+/* UART Port Control Register */
+#define NI8430_PORTCON	0x0f
+#define NI8430_PORTCON_TXVR_ENABLE	(1 << 3)
+
+static int
+pci_ni8430_setup(struct serial_private *priv, struct pciserial_board *board,
+		 struct uart_port *port, int idx)
+{
+	void __iomem *p;
+	unsigned long base, len;
+	unsigned int bar, offset = board->first_offset;
+
+	if (idx >= board->num_ports)
+		return 1;
+
+	bar = FL_GET_BASE(board->flags);
+	offset += idx * board->uart_offset;
+
+	base = pci_resource_start(priv->dev, bar);
+	len =  pci_resource_len(priv->dev, bar);
+	p = ioremap_nocache(base, len);
+
+	/* enable the transciever */
+	writeb(readb(p + offset + NI8430_PORTCON) | NI8430_PORTCON_TXVR_ENABLE,
+	       p + offset + NI8430_PORTCON);
+
+	iounmap(p);
+
+	return setup_port(priv, port, bar, offset, board->reg_shift);
+}
+
+
 static int pci_netmos_init(struct pci_dev *dev)
 {
 	/* subdevice 0x00PS means <P> parallel, <S> serial */
@@ -913,6 +1019,18 @@ static struct pci_serial_quirk pci_serial_quirks[] __refdata = {
 		.exit		= __devexit_p(pci_ite887x_exit),
 	},
 	/*
+	 * National Instruments
+	 */
+	{
+		.vendor		= PCI_VENDOR_ID_NI,
+		.device		= PCI_ANY_ID,
+		.subvendor	= PCI_ANY_ID,
+		.subdevice	= PCI_ANY_ID,
+		.init		= pci_ni8430_init,
+		.setup		= pci_ni8430_setup,
+		.exit		= __devexit_p(pci_ni8430_exit),
+	},
+	/*
 	 * Panacom
 	 */
 	{
@@ -1280,6 +1398,10 @@ enum pci_board_num_t {
 	pbn_exar_XR17C154,
 	pbn_exar_XR17C158,
 	pbn_pasemi_1682M,
+	pbn_ni8430_2,
+	pbn_ni8430_4,
+	pbn_ni8430_8,
+	pbn_ni8430_16,
 };
 
 /*
@@ -1850,6 +1972,37 @@ static struct pciserial_board pci_boards[] __devinitdata = {
 		.num_ports	= 1,
 		.base_baud	= 8333333,
 	},
+	/*
+	 * National Instruments 843x
+	 */
+	[pbn_ni8430_16] = {
+		.flags		= FL_BASE0,
+		.num_ports	= 16,
+		.base_baud	= 3686400,
+		.uart_offset	= 0x10,
+		.first_offset	= 0x800,
+	},
+	[pbn_ni8430_8] = {
+		.flags		= FL_BASE0,
+		.num_ports	= 8,
+		.base_baud	= 3686400,
+		.uart_offset	= 0x10,
+		.first_offset	= 0x800,
+	},
+	[pbn_ni8430_4] = {
+		.flags		= FL_BASE0,
+		.num_ports	= 4,
+		.base_baud	= 3686400,
+		.uart_offset	= 0x10,
+		.first_offset	= 0x800,
+	},
+	[pbn_ni8430_2] = {
+		.flags		= FL_BASE0,
+		.num_ports	= 2,
+		.base_baud	= 3686400,
+		.uart_offset	= 0x10,
+		.first_offset	= 0x800,
+	},
 };
 
 static const struct pci_device_id softmodem_blacklist[] = {
@@ -3052,6 +3205,46 @@ static struct pci_device_id serial_pci_tbl[] = {
 		pbn_pasemi_1682M },
 
 	/*
+	 * National Instruments
+	 */
+	{	PCI_VENDOR_ID_NI, PCI_DEVICE_ID_NI_PXI8430_2322,
+		PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+		pbn_ni8430_2 },
+	{	PCI_VENDOR_ID_NI, PCI_DEVICE_ID_NI_PCI8430_2322,
+		PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+		pbn_ni8430_2 },
+	{	PCI_VENDOR_ID_NI, PCI_DEVICE_ID_NI_PXI8430_2324,
+		PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+		pbn_ni8430_4 },
+	{	PCI_VENDOR_ID_NI, PCI_DEVICE_ID_NI_PCI8430_2324,
+		PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+		pbn_ni8430_4 },
+	{	PCI_VENDOR_ID_NI, PCI_DEVICE_ID_NI_PXI8430_2328,
+		PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+		pbn_ni8430_8 },
+	{	PCI_VENDOR_ID_NI, PCI_DEVICE_ID_NI_PCI8430_2328,
+		PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+		pbn_ni8430_8 },
+	{	PCI_VENDOR_ID_NI, PCI_DEVICE_ID_NI_PXI8430_23216,
+		PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+		pbn_ni8430_16 },
+	{	PCI_VENDOR_ID_NI, PCI_DEVICE_ID_NI_PCI8430_23216,
+		PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+		pbn_ni8430_16 },
+	{	PCI_VENDOR_ID_NI, PCI_DEVICE_ID_NI_PXI8432_2322,
+		PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+		pbn_ni8430_2 },
+	{	PCI_VENDOR_ID_NI, PCI_DEVICE_ID_NI_PCI8432_2322,
+		PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+		pbn_ni8430_2 },
+	{	PCI_VENDOR_ID_NI, PCI_DEVICE_ID_NI_PXI8432_2324,
+		PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+		pbn_ni8430_4 },
+	{	PCI_VENDOR_ID_NI, PCI_DEVICE_ID_NI_PCI8432_2324,
+		PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+		pbn_ni8430_4 },
+
+	/*
 	* ADDI-DATA GmbH communication cards <info@addi-data.com>
 	*/
 	{	PCI_VENDOR_ID_ADDIDATA,