[PATCH v3] serial/8250: Add support for NI-Serial PXI/PXIe+485 devices

From: jeyentam
Date: Fri Jul 05 2019 - 06:13:09 EST

Add support for NI-Serial PXIe-RS232, PXI-RS485 and PXIe-RS485 devices.

Signed-off-by: Je Yen Tam <je.yen.tam@xxxxxx>
---
drivers/tty/serial/8250/8250_pci.c | 298 ++++++++++++++++++++++++++++-
1 file changed, 294 insertions(+), 4 deletions(-)

diff --git a/drivers/tty/serial/8250/8250_pci.c b/drivers/tty/serial/8250/8250_pci.c
index df41397de478..23fe3b7197ad 100644
--- a/drivers/tty/serial/8250/8250_pci.c
+++ b/drivers/tty/serial/8250/8250_pci.c
@@ -730,8 +730,16 @@ static int pci_ni8430_init(struct pci_dev *dev)
}

/* UART Port Control Register */
-#define NI8430_PORTCON 0x0f
-#define NI8430_PORTCON_TXVR_ENABLE (1 << 3)
+#define NI16550_PCR_OFFSET 0x0f
+#define NI16550_PCR_RS422 0x00
+#define NI16550_PCR_ECHO_RS485 0x01
+#define NI16550_PCR_DTR_RS485 0x02
+#define NI16550_PCR_AUTO_RS485 0x03
+#define NI16550_PCR_WIRE_MODE_MASK 0x03
+#define NI16550_PCR_TXVR_ENABLE_BIT BIT(3)
+#define NI16550_PCR_RS485_TERMINATION_BIT BIT(6)
+#define NI16550_ACR_DTR_AUTO_DTR (0x2 << 3)
+#define NI16550_ACR_DTR_MANUAL_DTR (0x0 << 3)

static int
pci_ni8430_setup(struct serial_private *priv,
@@ -753,14 +761,123 @@ pci_ni8430_setup(struct serial_private *priv,
return -ENOMEM;

/* enable the transceiver */
- writeb(readb(p + offset + NI8430_PORTCON) | NI8430_PORTCON_TXVR_ENABLE,
- p + offset + NI8430_PORTCON);
+ writeb(readb(p + offset + NI16550_PCR_OFFSET) | NI16550_PCR_TXVR_ENABLE_BIT,
+ p + offset + NI16550_PCR_OFFSET);

iounmap(p);

return setup_port(priv, port, bar, offset, board->reg_shift);
}

+static int pci_ni8431_config_rs485(struct uart_port *port,
+ struct serial_rs485 *rs485)
+{
+ u8 pcr, acr;
+
+ struct uart_8250_port *up;
+
+ up = container_of(port, struct uart_8250_port, port);
+
+ acr = up->acr;
+
+ trace_printk("start ni16550_config_rs485\n");
+
+ pcr = port->serial_in(port, NI16550_PCR_OFFSET);
+ pcr &= ~NI16550_PCR_WIRE_MODE_MASK;
+
+ if (rs485->flags & SER_RS485_ENABLED) {
+ /* RS-485 */
+ if ((rs485->flags & SER_RS485_RX_DURING_TX) &&
+ (rs485->flags & SER_RS485_RTS_ON_SEND)) {
+ dev_dbg(port->dev, "Invalid 2-wire mode\n");
+ return -EINVAL;
+ }
+
+ if (rs485->flags & SER_RS485_RX_DURING_TX) {
+ /* Echo */
+ dev_vdbg(port->dev, "2-wire DTR with echo\n");
+ pcr |= NI16550_PCR_ECHO_RS485;
+ acr |= NI16550_ACR_DTR_MANUAL_DTR;
+ } else {
+ /* Auto or DTR */
+ if (rs485->flags & SER_RS485_RTS_ON_SEND) {
+ /* Auto */
+ dev_vdbg(port->dev, "2-wire Auto\n");
+ pcr |= NI16550_PCR_AUTO_RS485;
+ acr |= NI16550_ACR_DTR_AUTO_DTR;
+ } else {
+ /* DTR-controlled */
+ /* No Echo */
+ dev_vdbg(port->dev, "2-wire DTR no echo\n");
+ pcr |= NI16550_PCR_DTR_RS485;
+ acr |= NI16550_ACR_DTR_MANUAL_DTR;
+ }
+ }
+ } else {
+ /* RS-422 */
+ dev_vdbg(port->dev, "4-wire\n");
+ pcr |= NI16550_PCR_RS422;
+ acr |= NI16550_ACR_DTR_MANUAL_DTR;
+ }
+
+ dev_dbg(port->dev, "write pcr: 0x%08x\n", pcr);
+ port->serial_out(port, NI16550_PCR_OFFSET, pcr);
+
+ up->acr = acr;
+ port->serial_out(port, UART_SCR, UART_ACR);
+ port->serial_out(port, UART_ICR, up->acr);
+
+ /* Update the cache. */
+ port->rs485 = *rs485;
+
+ trace_printk("end ni16550_config_rs485\n");
+ return 0;
+}
+
+static int pci_ni8431_setup(struct serial_private *priv,
+ const struct pciserial_board *board,
+ struct uart_8250_port *uart, int idx)
+{
+ u8 pcr, acr;
+ struct pci_dev *dev = priv->dev;
+ void __iomem *addr;
+ 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;
+
+ addr = pci_ioremap_bar(dev, bar);
+ if (!addr)
+ return -ENOMEM;
+
+ /* enable the transceiver */
+ writeb(readb(addr + NI16550_PCR_OFFSET) | NI16550_PCR_TXVR_ENABLE_BIT,
+ addr + NI16550_PCR_OFFSET);
+
+ pcr = readb(addr + NI16550_PCR_OFFSET);
+ pcr &= ~NI16550_PCR_WIRE_MODE_MASK;
+
+ /* set wire mode to default RS-422 */
+ pcr |= NI16550_PCR_RS422;
+ acr = NI16550_ACR_DTR_MANUAL_DTR;
+
+ /* write port configuration to register */
+ writeb(pcr, addr + NI16550_PCR_OFFSET);
+
+ /* access and write to UART acr register */
+ writeb(UART_ACR, addr + UART_SCR);
+ writeb(acr, addr + UART_ICR);
+
+ uart->port.rs485_config = &pci_ni8431_config_rs485;
+
+ iounmap(addr);
+
+ return setup_port(priv, uart, bar, offset, board->reg_shift);
+}
+
static int pci_netmos_9900_setup(struct serial_private *priv,
const struct pciserial_board *board,
struct uart_8250_port *port, int idx)
@@ -1731,6 +1848,15 @@ pci_wch_ch38x_setup(struct serial_private *priv,
#define PCI_DEVICE_ID_ACCESIO_PCIE_COM_8SM 0x10E9
#define PCI_DEVICE_ID_ACCESIO_PCIE_ICM_4SM 0x11D8

+#define PCIE_DEVICE_ID_NI_PXIE8430_2328 0x74C2
+#define PCIE_DEVICE_ID_NI_PXIE8430_23216 0x74C1
+#define PCI_DEVICE_ID_NI_PXI8431_4852 0x7081
+#define PCI_DEVICE_ID_NI_PXI8431_4854 0x70DE
+#define PCI_DEVICE_ID_NI_PXI8431_4858 0x70E3
+#define PCI_DEVICE_ID_NI_PXI8433_4852 0x70E9
+#define PCI_DEVICE_ID_NI_PXI8433_4854 0x70ED
+#define PCIE_DEVICE_ID_NI_PXIE8431_4858 0x74C4
+#define PCIE_DEVICE_ID_NI_PXIE8431_48516 0x74C3


/* Unknown vendors/cards - this should not be in linux/pci_ids.h */
@@ -1956,6 +2082,87 @@ static struct pci_serial_quirk pci_serial_quirks[] __refdata = {
.setup = pci_ni8430_setup,
.exit = pci_ni8430_exit,
},
+ {
+ .vendor = PCI_VENDOR_ID_NI,
+ .device = PCIE_DEVICE_ID_NI_PXIE8430_2328,
+ .subvendor = PCI_ANY_ID,
+ .subdevice = PCI_ANY_ID,
+ .init = pci_ni8430_init,
+ .setup = pci_ni8430_setup,
+ .exit = pci_ni8430_exit,
+ },
+ {
+ .vendor = PCI_VENDOR_ID_NI,
+ .device = PCIE_DEVICE_ID_NI_PXIE8430_23216,
+ .subvendor = PCI_ANY_ID,
+ .subdevice = PCI_ANY_ID,
+ .init = pci_ni8430_init,
+ .setup = pci_ni8430_setup,
+ .exit = pci_ni8430_exit,
+ },
+ {
+ .vendor = PCI_VENDOR_ID_NI,
+ .device = PCI_DEVICE_ID_NI_PXI8431_4852,
+ .subvendor = PCI_ANY_ID,
+ .subdevice = PCI_ANY_ID,
+ .init = pci_ni8430_init,
+ .setup = pci_ni8431_setup,
+ .exit = pci_ni8430_exit,
+ },
+ {
+ .vendor = PCI_VENDOR_ID_NI,
+ .device = PCI_DEVICE_ID_NI_PXI8431_4854,
+ .subvendor = PCI_ANY_ID,
+ .subdevice = PCI_ANY_ID,
+ .init = pci_ni8430_init,
+ .setup = pci_ni8431_setup,
+ .exit = pci_ni8430_exit,
+ },
+ {
+ .vendor = PCI_VENDOR_ID_NI,
+ .device = PCI_DEVICE_ID_NI_PXI8431_4858,
+ .subvendor = PCI_ANY_ID,
+ .subdevice = PCI_ANY_ID,
+ .init = pci_ni8430_init,
+ .setup = pci_ni8431_setup,
+ .exit = pci_ni8430_exit,
+ },
+ {
+ .vendor = PCI_VENDOR_ID_NI,
+ .device = PCI_DEVICE_ID_NI_PXI8433_4852,
+ .subvendor = PCI_ANY_ID,
+ .subdevice = PCI_ANY_ID,
+ .init = pci_ni8430_init,
+ .setup = pci_ni8431_setup,
+ .exit = pci_ni8430_exit,
+ },
+ {
+ .vendor = PCI_VENDOR_ID_NI,
+ .device = PCI_DEVICE_ID_NI_PXI8433_4854,
+ .subvendor = PCI_ANY_ID,
+ .subdevice = PCI_ANY_ID,
+ .init = pci_ni8430_init,
+ .setup = pci_ni8431_setup,
+ .exit = pci_ni8430_exit,
+ },
+ {
+ .vendor = PCI_VENDOR_ID_NI,
+ .device = PCIE_DEVICE_ID_NI_PXIE8431_4858,
+ .subvendor = PCI_ANY_ID,
+ .subdevice = PCI_ANY_ID,
+ .init = pci_ni8430_init,
+ .setup = pci_ni8431_setup,
+ .exit = pci_ni8430_exit,
+ },
+ {
+ .vendor = PCI_VENDOR_ID_NI,
+ .device = PCIE_DEVICE_ID_NI_PXIE8431_48516,
+ .subvendor = PCI_ANY_ID,
+ .subdevice = PCI_ANY_ID,
+ .init = pci_ni8430_init,
+ .setup = pci_ni8431_setup,
+ .exit = pci_ni8430_exit,
+ },
/* Quatech */
{
.vendor = PCI_VENDOR_ID_QUATECH,
@@ -2679,6 +2886,13 @@ enum pci_board_num_t {
pbn_ni8430_4,
pbn_ni8430_8,
pbn_ni8430_16,
+ pbn_ni8430_pxie_8,
+ pbn_ni8430_pxie_16,
+ pbn_ni8431_2,
+ pbn_ni8431_4,
+ pbn_ni8431_8,
+ pbn_ni8431_pxie_8,
+ pbn_ni8431_pxie_16,
pbn_ADDIDATA_PCIe_1_3906250,
pbn_ADDIDATA_PCIe_2_3906250,
pbn_ADDIDATA_PCIe_4_3906250,
@@ -3320,6 +3534,55 @@ static struct pciserial_board pci_boards[] = {
.uart_offset = 0x10,
.first_offset = 0x800,
},
+ [pbn_ni8430_pxie_16] = {
+ .flags = FL_BASE0,
+ .num_ports = 16,
+ .base_baud = 3125000,
+ .uart_offset = 0x10,
+ .first_offset = 0x800,
+ },
+ [pbn_ni8430_pxie_8] = {
+ .flags = FL_BASE0,
+ .num_ports = 8,
+ .base_baud = 3125000,
+ .uart_offset = 0x10,
+ .first_offset = 0x800,
+ },
+ [pbn_ni8431_8] = {
+ .flags = FL_BASE0,
+ .num_ports = 8,
+ .base_baud = 3686400,
+ .uart_offset = 0x10,
+ .first_offset = 0x800,
+ },
+ [pbn_ni8431_4] = {
+ .flags = FL_BASE0,
+ .num_ports = 4,
+ .base_baud = 3686400,
+ .uart_offset = 0x10,
+ .first_offset = 0x800,
+ },
+ [pbn_ni8431_2] = {
+ .flags = FL_BASE0,
+ .num_ports = 2,
+ .base_baud = 3686400,
+ .uart_offset = 0x10,
+ .first_offset = 0x800,
+ },
+ [pbn_ni8431_pxie_16] = {
+ .flags = FL_BASE0,
+ .num_ports = 16,
+ .base_baud = 3125000,
+ .uart_offset = 0x10,
+ .first_offset = 0x800,
+ },
+ [pbn_ni8431_pxie_8] = {
+ .flags = FL_BASE0,
+ .num_ports = 8,
+ .base_baud = 3125000,
+ .uart_offset = 0x10,
+ .first_offset = 0x800,
+ },
/*
* ADDI-DATA GmbH PCI-Express communication cards <info@xxxxxxxxxxxxx>
*/
@@ -5003,6 +5266,33 @@ static const struct pci_device_id serial_pci_tbl[] = {
{ PCI_VENDOR_ID_NI, PCI_DEVICE_ID_NI_PCI8432_2324,
PCI_ANY_ID, PCI_ANY_ID, 0, 0,
pbn_ni8430_4 },
+ { PCI_VENDOR_ID_NI, PCIE_DEVICE_ID_NI_PXIE8430_2328,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ pbn_ni8430_pxie_8 },
+ { PCI_VENDOR_ID_NI, PCIE_DEVICE_ID_NI_PXIE8430_23216,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ pbn_ni8430_pxie_16 },
+ { PCI_VENDOR_ID_NI, PCI_DEVICE_ID_NI_PXI8431_4852,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ pbn_ni8431_2 },
+ { PCI_VENDOR_ID_NI, PCI_DEVICE_ID_NI_PXI8431_4854,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ pbn_ni8431_4 },
+ { PCI_VENDOR_ID_NI, PCI_DEVICE_ID_NI_PXI8431_4858,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ pbn_ni8431_8 },
+ { PCI_VENDOR_ID_NI, PCIE_DEVICE_ID_NI_PXIE8431_4858,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ pbn_ni8431_pxie_8 },
+ { PCI_VENDOR_ID_NI, PCIE_DEVICE_ID_NI_PXIE8431_48516,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ pbn_ni8431_pxie_16 },
+ { PCI_VENDOR_ID_NI, PCI_DEVICE_ID_NI_PXI8433_4852,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ pbn_ni8431_2 },
+ { PCI_VENDOR_ID_NI, PCI_DEVICE_ID_NI_PXI8433_4854,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ pbn_ni8431_4 },

/*
* ADDI-DATA GmbH communication cards <info@xxxxxxxxxxxxx>
--
2.17.1