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serial: exar: split out the exar code from 8250_pci
Add the serial driver for the Exar chips. And also register the platform device for the GPIO provided by the Exar chips. Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Signed-off-by: Sudip Mukherjee <sudip.mukherjee@codethink.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Sudip Mukherjee
Greg Kroah-Hartman
parent
bc2be239fe
commit
d0aeaa83f0
396
drivers/tty/serial/8250/8250_exar.c
Normal file
396
drivers/tty/serial/8250/8250_exar.c
Normal file
@ -0,0 +1,396 @@
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/*
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* Probe module for 8250/16550-type Exar chips PCI serial ports.
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*
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* Based on drivers/tty/serial/8250/8250_pci.c,
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*
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* Copyright (C) 2017 Sudip Mukherjee, All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License.
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*/
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#include <linux/io.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <linux/serial_core.h>
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#include <linux/serial_reg.h>
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#include <linux/slab.h>
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#include <linux/string.h>
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#include <linux/tty.h>
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#include <linux/8250_pci.h>
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#include <asm/byteorder.h>
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#include "8250.h"
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#define PCI_DEVICE_ID_COMMTECH_4224PCIE 0x0020
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#define PCI_DEVICE_ID_COMMTECH_4228PCIE 0x0021
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#define PCI_DEVICE_ID_COMMTECH_4222PCIE 0x0022
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#define PCI_DEVICE_ID_EXAR_XR17V4358 0x4358
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#define PCI_DEVICE_ID_EXAR_XR17V8358 0x8358
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#define UART_EXAR_MPIOINT_7_0 0x8f /* MPIOINT[7:0] */
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#define UART_EXAR_MPIOLVL_7_0 0x90 /* MPIOLVL[7:0] */
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#define UART_EXAR_MPIO3T_7_0 0x91 /* MPIO3T[7:0] */
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#define UART_EXAR_MPIOINV_7_0 0x92 /* MPIOINV[7:0] */
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#define UART_EXAR_MPIOSEL_7_0 0x93 /* MPIOSEL[7:0] */
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#define UART_EXAR_MPIOOD_7_0 0x94 /* MPIOOD[7:0] */
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#define UART_EXAR_MPIOINT_15_8 0x95 /* MPIOINT[15:8] */
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#define UART_EXAR_MPIOLVL_15_8 0x96 /* MPIOLVL[15:8] */
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#define UART_EXAR_MPIO3T_15_8 0x97 /* MPIO3T[15:8] */
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#define UART_EXAR_MPIOINV_15_8 0x98 /* MPIOINV[15:8] */
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#define UART_EXAR_MPIOSEL_15_8 0x99 /* MPIOSEL[15:8] */
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#define UART_EXAR_MPIOOD_15_8 0x9a /* MPIOOD[15:8] */
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struct exar8250;
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/**
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* struct exar8250_board - board information
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* @num_ports: number of serial ports
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* @reg_shift: describes UART register mapping in PCI memory
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*/
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struct exar8250_board {
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unsigned int num_ports;
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unsigned int reg_shift;
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bool has_slave;
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int (*setup)(struct exar8250 *, struct pci_dev *,
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struct uart_8250_port *, int);
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void (*exit)(struct pci_dev *pcidev);
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};
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struct exar8250 {
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unsigned int nr;
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struct exar8250_board *board;
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int line[0];
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};
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static int default_setup(struct exar8250 *priv, struct pci_dev *pcidev,
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int idx, unsigned int offset,
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struct uart_8250_port *port)
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{
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const struct exar8250_board *board = priv->board;
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unsigned int bar = 0;
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port->port.iotype = UPIO_MEM;
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port->port.mapbase = pci_resource_start(pcidev, bar) + offset;
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port->port.membase = pcim_iomap_table(pcidev)[bar] + offset;
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port->port.regshift = board->reg_shift;
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return 0;
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}
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static int
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pci_connect_tech_setup(struct exar8250 *priv, struct pci_dev *pcidev,
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struct uart_8250_port *port, int idx)
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{
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unsigned int offset = idx * 0x200;
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unsigned int baud = 1843200;
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port->port.uartclk = baud * 16;
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return default_setup(priv, pcidev, idx, offset, port);
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}
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static int
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pci_xr17c154_setup(struct exar8250 *priv, struct pci_dev *pcidev,
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struct uart_8250_port *port, int idx)
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{
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unsigned int offset = idx * 0x200;
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unsigned int baud = 921600;
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port->port.uartclk = baud * 16;
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return default_setup(priv, pcidev, idx, offset, port);
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}
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static void setup_gpio(u8 __iomem *p)
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{
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writeb(0x00, p + UART_EXAR_MPIOINT_7_0);
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writeb(0x00, p + UART_EXAR_MPIOLVL_7_0);
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writeb(0x00, p + UART_EXAR_MPIO3T_7_0);
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writeb(0x00, p + UART_EXAR_MPIOINV_7_0);
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writeb(0x00, p + UART_EXAR_MPIOSEL_7_0);
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writeb(0x00, p + UART_EXAR_MPIOOD_7_0);
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writeb(0x00, p + UART_EXAR_MPIOINT_15_8);
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writeb(0x00, p + UART_EXAR_MPIOLVL_15_8);
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writeb(0x00, p + UART_EXAR_MPIO3T_15_8);
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writeb(0x00, p + UART_EXAR_MPIOINV_15_8);
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writeb(0x00, p + UART_EXAR_MPIOSEL_15_8);
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writeb(0x00, p + UART_EXAR_MPIOOD_15_8);
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}
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static void *
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xr17v35x_register_gpio(struct pci_dev *pcidev)
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{
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struct platform_device *pdev;
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pdev = platform_device_alloc("gpio_exar", PLATFORM_DEVID_AUTO);
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if (!pdev)
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return NULL;
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platform_set_drvdata(pdev, pcidev);
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if (platform_device_add(pdev) < 0) {
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platform_device_put(pdev);
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return NULL;
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}
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return pdev;
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}
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static int
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pci_xr17v35x_setup(struct exar8250 *priv, struct pci_dev *pcidev,
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struct uart_8250_port *port, int idx)
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{
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const struct exar8250_board *board = priv->board;
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unsigned int offset = idx * 0x400;
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unsigned int baud = 7812500;
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u8 __iomem *p;
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int ret;
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port->port.uartclk = baud * 16;
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/*
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* Setup the uart clock for the devices on expansion slot to
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* half the clock speed of the main chip (which is 125MHz)
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*/
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if (board->has_slave && idx >= 8)
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port->port.uartclk /= 2;
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p = pci_ioremap_bar(pcidev, 0);
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if (!p)
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return -ENOMEM;
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/* Setup Multipurpose Input/Output pins. */
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if (idx == 0)
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setup_gpio(p);
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writeb(0x00, p + UART_EXAR_8XMODE);
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writeb(UART_FCTR_EXAR_TRGD, p + UART_EXAR_FCTR);
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writeb(128, p + UART_EXAR_TXTRG);
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writeb(128, p + UART_EXAR_RXTRG);
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iounmap(p);
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ret = default_setup(priv, pcidev, idx, offset, port);
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if (ret)
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return ret;
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if (idx == 0)
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port->port.private_data =
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xr17v35x_register_gpio(pcidev);
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return 0;
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}
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static void pci_xr17v35x_exit(struct pci_dev *pcidev)
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{
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struct exar8250 *priv = pci_get_drvdata(pcidev);
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struct uart_8250_port *port = serial8250_get_port(priv->line[0]);
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struct platform_device *pdev = port->port.private_data;
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platform_device_unregister(pdev);
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port->port.private_data = NULL;
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}
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static int
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exar_pci_probe(struct pci_dev *pcidev, const struct pci_device_id *ent)
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{
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unsigned int nr_ports, i, bar = 0, maxnr;
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struct exar8250_board *board;
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struct uart_8250_port uart;
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struct exar8250 *priv;
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int rc;
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board = (struct exar8250_board *)ent->driver_data;
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if (!board)
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return -EINVAL;
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rc = pcim_enable_device(pcidev);
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if (rc)
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return rc;
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maxnr = pci_resource_len(pcidev, bar) >> (board->reg_shift + 3);
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nr_ports = board->num_ports ? board->num_ports : pcidev->device & 0x0f;
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priv = devm_kzalloc(&pcidev->dev, sizeof(*priv) +
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sizeof(unsigned int) * nr_ports,
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GFP_KERNEL);
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if (!priv)
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return -ENOMEM;
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priv->board = board;
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memset(&uart, 0, sizeof(uart));
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uart.port.flags = UPF_SKIP_TEST | UPF_BOOT_AUTOCONF | UPF_SHARE_IRQ
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| UPF_EXAR_EFR;
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uart.port.irq = pcidev->irq;
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uart.port.dev = &pcidev->dev;
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for (i = 0; i < nr_ports && i < maxnr; i++) {
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rc = board->setup(priv, pcidev, &uart, i);
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if (rc) {
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dev_err(&pcidev->dev, "Failed to setup port %u\n", i);
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break;
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}
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dev_dbg(&pcidev->dev, "Setup PCI port: port %lx, irq %d, type %d\n",
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uart.port.iobase, uart.port.irq, uart.port.iotype);
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priv->line[i] = serial8250_register_8250_port(&uart);
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if (priv->line[i] < 0) {
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dev_err(&pcidev->dev,
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"Couldn't register serial port %lx, irq %d, type %d, error %d\n",
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uart.port.iobase, uart.port.irq,
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uart.port.iotype, priv->line[i]);
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break;
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}
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}
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priv->nr = i;
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pci_set_drvdata(pcidev, priv);
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return 0;
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}
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static void exar_pci_remove(struct pci_dev *pcidev)
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{
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struct exar8250 *priv = pci_get_drvdata(pcidev);
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unsigned int i;
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for (i = 0; i < priv->nr; i++)
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serial8250_unregister_port(priv->line[i]);
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if (priv->board->exit)
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priv->board->exit(pcidev);
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}
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static int __maybe_unused exar_suspend(struct device *dev)
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{
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struct pci_dev *pcidev = to_pci_dev(dev);
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struct exar8250 *priv = pci_get_drvdata(pcidev);
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unsigned int i;
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for (i = 0; i < priv->nr; i++)
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if (priv->line[i] >= 0)
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serial8250_suspend_port(priv->line[i]);
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/* Ensure that every init quirk is properly torn down */
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if (priv->board->exit)
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priv->board->exit(pcidev);
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return 0;
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}
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static int __maybe_unused exar_resume(struct device *dev)
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{
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struct pci_dev *pcidev = to_pci_dev(dev);
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struct exar8250 *priv = pci_get_drvdata(pcidev);
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unsigned int i;
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for (i = 0; i < priv->nr; i++)
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if (priv->line[i] >= 0)
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serial8250_resume_port(priv->line[i]);
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return 0;
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}
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static SIMPLE_DEV_PM_OPS(exar_pci_pm, exar_suspend, exar_resume);
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static const struct exar8250_board pbn_connect = {
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.setup = pci_connect_tech_setup,
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};
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static const struct exar8250_board pbn_exar_ibm_saturn = {
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.num_ports = 1,
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.setup = pci_xr17c154_setup,
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};
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static const struct exar8250_board pbn_exar_XR17C15x = {
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.setup = pci_xr17c154_setup,
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};
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static const struct exar8250_board pbn_exar_XR17V35x = {
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.setup = pci_xr17v35x_setup,
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.exit = pci_xr17v35x_exit,
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};
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static const struct exar8250_board pbn_exar_XR17V4358 = {
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.num_ports = 12,
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.has_slave = true,
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.setup = pci_xr17v35x_setup,
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.exit = pci_xr17v35x_exit,
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};
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static const struct exar8250_board pbn_exar_XR17V8358 = {
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.num_ports = 16,
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.has_slave = true,
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.setup = pci_xr17v35x_setup,
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.exit = pci_xr17v35x_exit,
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};
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#define CONNECT_DEVICE(devid, sdevid, bd) { \
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PCI_DEVICE_SUB( \
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PCI_VENDOR_ID_EXAR, \
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PCI_DEVICE_ID_EXAR_##devid, \
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PCI_SUBVENDOR_ID_CONNECT_TECH, \
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PCI_SUBDEVICE_ID_CONNECT_TECH_PCI_##sdevid), 0, 0, \
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(kernel_ulong_t)&bd \
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}
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#define EXAR_DEVICE(vend, devid, bd) { \
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PCI_VDEVICE(vend, PCI_DEVICE_ID_##devid), (kernel_ulong_t)&bd \
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}
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#define IBM_DEVICE(devid, sdevid, bd) { \
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PCI_DEVICE_SUB( \
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PCI_VENDOR_ID_EXAR, \
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PCI_DEVICE_ID_EXAR_##devid, \
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PCI_VENDOR_ID_IBM, \
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PCI_SUBDEVICE_ID_IBM_##sdevid), 0, 0, \
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(kernel_ulong_t)&bd \
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}
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static struct pci_device_id exar_pci_tbl[] = {
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CONNECT_DEVICE(XR17C152, UART_2_232, pbn_connect),
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CONNECT_DEVICE(XR17C154, UART_4_232, pbn_connect),
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CONNECT_DEVICE(XR17C158, UART_8_232, pbn_connect),
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CONNECT_DEVICE(XR17C152, UART_1_1, pbn_connect),
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CONNECT_DEVICE(XR17C154, UART_2_2, pbn_connect),
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CONNECT_DEVICE(XR17C158, UART_4_4, pbn_connect),
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CONNECT_DEVICE(XR17C152, UART_2, pbn_connect),
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CONNECT_DEVICE(XR17C154, UART_4, pbn_connect),
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CONNECT_DEVICE(XR17C158, UART_8, pbn_connect),
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CONNECT_DEVICE(XR17C152, UART_2_485, pbn_connect),
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CONNECT_DEVICE(XR17C154, UART_4_485, pbn_connect),
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CONNECT_DEVICE(XR17C158, UART_8_485, pbn_connect),
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IBM_DEVICE(XR17C152, SATURN_SERIAL_ONE_PORT, pbn_exar_ibm_saturn),
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/* Exar Corp. XR17C15[248] Dual/Quad/Octal UART */
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EXAR_DEVICE(EXAR, EXAR_XR17C152, pbn_exar_XR17C15x),
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EXAR_DEVICE(EXAR, EXAR_XR17C154, pbn_exar_XR17C15x),
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EXAR_DEVICE(EXAR, EXAR_XR17C158, pbn_exar_XR17C15x),
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/* Exar Corp. XR17V[48]35[248] Dual/Quad/Octal/Hexa PCIe UARTs */
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EXAR_DEVICE(EXAR, EXAR_XR17V352, pbn_exar_XR17V35x),
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EXAR_DEVICE(EXAR, EXAR_XR17V354, pbn_exar_XR17V35x),
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EXAR_DEVICE(EXAR, EXAR_XR17V358, pbn_exar_XR17V35x),
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EXAR_DEVICE(EXAR, EXAR_XR17V4358, pbn_exar_XR17V4358),
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EXAR_DEVICE(EXAR, EXAR_XR17V8358, pbn_exar_XR17V8358),
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EXAR_DEVICE(COMMTECH, COMMTECH_4222PCIE, pbn_exar_XR17V35x),
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EXAR_DEVICE(COMMTECH, COMMTECH_4224PCIE, pbn_exar_XR17V35x),
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EXAR_DEVICE(COMMTECH, COMMTECH_4228PCIE, pbn_exar_XR17V35x),
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{ 0, }
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};
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MODULE_DEVICE_TABLE(pci, exar_pci_tbl);
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static struct pci_driver exar_pci_driver = {
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.name = "exar_serial",
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.probe = exar_pci_probe,
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.remove = exar_pci_remove,
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.driver = {
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.pm = &exar_pci_pm,
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},
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.id_table = exar_pci_tbl,
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};
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module_pci_driver(exar_pci_driver);
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("Exar Serial Dricer");
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MODULE_AUTHOR("Sudip Mukherjee <sudip.mukherjee@codethink.co.uk>");
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@ -127,6 +127,10 @@ config SERIAL_8250_PCI
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Note that serial ports on NetMos 9835 Multi-I/O cards are handled
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by the parport_serial driver, enabled with CONFIG_PARPORT_SERIAL.
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config SERIAL_8250_EXAR
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tristate "8250/16550 PCI device support"
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depends on SERIAL_8250_PCI
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config SERIAL_8250_HP300
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tristate
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depends on SERIAL_8250 && HP300
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@ -10,6 +10,7 @@ obj-$(CONFIG_SERIAL_8250) += 8250.o 8250_base.o
|
||||
8250_base-$(CONFIG_SERIAL_8250_FINTEK) += 8250_fintek.o
|
||||
obj-$(CONFIG_SERIAL_8250_GSC) += 8250_gsc.o
|
||||
obj-$(CONFIG_SERIAL_8250_PCI) += 8250_pci.o
|
||||
obj-$(CONFIG_SERIAL_8250_EXAR) += 8250_exar.o
|
||||
obj-$(CONFIG_SERIAL_8250_HP300) += 8250_hp300.o
|
||||
obj-$(CONFIG_SERIAL_8250_CS) += serial_cs.o
|
||||
obj-$(CONFIG_SERIAL_8250_ACORN) += 8250_acorn.o
|
||||
|
||||
Loading…
Reference in New Issue
Block a user