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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/tty/serial/8250/8250_pericom.c
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/tty/serial/8250/8250_pericom.c')
-rw-r--r--drivers/tty/serial/8250/8250_pericom.c214
1 files changed, 214 insertions, 0 deletions
diff --git a/drivers/tty/serial/8250/8250_pericom.c b/drivers/tty/serial/8250/8250_pericom.c
new file mode 100644
index 000000000..b8d5b7714
--- /dev/null
+++ b/drivers/tty/serial/8250/8250_pericom.c
@@ -0,0 +1,214 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Driver for Pericom UART */
+
+#include <linux/bits.h>
+#include <linux/module.h>
+#include <linux/overflow.h>
+#include <linux/pci.h>
+
+#include "8250.h"
+
+#define PCI_DEVICE_ID_ACCESSIO_PCIE_COM_2SDB 0x1051
+#define PCI_DEVICE_ID_ACCESSIO_MPCIE_COM_2S 0x1053
+#define PCI_DEVICE_ID_ACCESSIO_PCIE_COM422_4 0x105a
+#define PCI_DEVICE_ID_ACCESSIO_PCIE_COM485_4 0x105b
+#define PCI_DEVICE_ID_ACCESSIO_PCIE_COM_4SDB 0x105c
+#define PCI_DEVICE_ID_ACCESSIO_MPCIE_COM_4S 0x105e
+#define PCI_DEVICE_ID_ACCESSIO_PCIE_COM422_8 0x106a
+#define PCI_DEVICE_ID_ACCESSIO_PCIE_COM485_8 0x106b
+#define PCI_DEVICE_ID_ACCESSIO_PCIE_COM232_2DB 0x1091
+#define PCI_DEVICE_ID_ACCESSIO_MPCIE_COM232_2 0x1093
+#define PCI_DEVICE_ID_ACCESSIO_PCIE_COM232_4 0x1098
+#define PCI_DEVICE_ID_ACCESSIO_PCIE_COM232_4DB 0x1099
+#define PCI_DEVICE_ID_ACCESSIO_MPCIE_COM232_4 0x109b
+#define PCI_DEVICE_ID_ACCESSIO_PCIE_COM232_8 0x10a9
+#define PCI_DEVICE_ID_ACCESSIO_PCIE_COM_2SMDB 0x10d1
+#define PCI_DEVICE_ID_ACCESSIO_MPCIE_COM_2SM 0x10d3
+#define PCI_DEVICE_ID_ACCESSIO_PCIE_COM_4SM 0x10d9
+#define PCI_DEVICE_ID_ACCESSIO_PCIE_COM_4SMDB 0x10da
+#define PCI_DEVICE_ID_ACCESSIO_MPCIE_COM_4SM 0x10dc
+#define PCI_DEVICE_ID_ACCESSIO_PCIE_COM_8SM 0x10e9
+#define PCI_DEVICE_ID_ACCESSIO_MPCIE_ICM485_1 0x1108
+#define PCI_DEVICE_ID_ACCESSIO_MPCIE_ICM422_2 0x1110
+#define PCI_DEVICE_ID_ACCESSIO_MPCIE_ICM485_2 0x1111
+#define PCI_DEVICE_ID_ACCESSIO_MPCIE_ICM422_4 0x1118
+#define PCI_DEVICE_ID_ACCESSIO_MPCIE_ICM485_4 0x1119
+#define PCI_DEVICE_ID_ACCESSIO_PCIE_ICM_2S 0x1152
+#define PCI_DEVICE_ID_ACCESSIO_PCIE_ICM_4S 0x115a
+#define PCI_DEVICE_ID_ACCESSIO_PCIE_ICM232_2 0x1190
+#define PCI_DEVICE_ID_ACCESSIO_MPCIE_ICM232_2 0x1191
+#define PCI_DEVICE_ID_ACCESSIO_PCIE_ICM232_4 0x1198
+#define PCI_DEVICE_ID_ACCESSIO_MPCIE_ICM232_4 0x1199
+#define PCI_DEVICE_ID_ACCESSIO_PCIE_ICM_2SM 0x11d0
+#define PCI_DEVICE_ID_ACCESSIO_PCIE_ICM_4SM 0x11d8
+
+struct pericom8250 {
+ void __iomem *virt;
+ unsigned int nr;
+ int line[];
+};
+
+static void pericom_do_set_divisor(struct uart_port *port, unsigned int baud,
+ unsigned int quot, unsigned int quot_frac)
+{
+ int scr;
+
+ for (scr = 16; scr > 4; scr--) {
+ unsigned int maxrate = port->uartclk / scr;
+ unsigned int divisor = max(maxrate / baud, 1U);
+ int delta = maxrate / divisor - baud;
+
+ if (baud > maxrate + baud / 50)
+ continue;
+
+ if (delta > baud / 50)
+ divisor++;
+
+ if (divisor > 0xffff)
+ continue;
+
+ /* Update delta due to possible divisor change */
+ delta = maxrate / divisor - baud;
+ if (abs(delta) < baud / 50) {
+ struct uart_8250_port *up = up_to_u8250p(port);
+ int lcr = serial_port_in(port, UART_LCR);
+
+ serial_port_out(port, UART_LCR, lcr | UART_LCR_DLAB);
+ serial_dl_write(up, divisor);
+ serial_port_out(port, 2, 16 - scr);
+ serial_port_out(port, UART_LCR, lcr);
+ return;
+ }
+ }
+}
+
+static int pericom8250_probe(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+ unsigned int nr, i, bar = 0, maxnr;
+ struct pericom8250 *pericom;
+ struct uart_8250_port uart;
+ int ret;
+
+ ret = pcim_enable_device(pdev);
+ if (ret)
+ return ret;
+
+ maxnr = pci_resource_len(pdev, bar) >> 3;
+
+ if (pdev->vendor == PCI_VENDOR_ID_PERICOM)
+ nr = pdev->device & 0x0f;
+ else if (pdev->vendor == PCI_VENDOR_ID_ACCESSIO)
+ nr = BIT(((pdev->device & 0x38) >> 3) - 1);
+ else
+ nr = 1;
+
+ pericom = devm_kzalloc(&pdev->dev, struct_size(pericom, line, nr), GFP_KERNEL);
+ if (!pericom)
+ return -ENOMEM;
+
+ pericom->virt = pcim_iomap(pdev, bar, 0);
+ if (!pericom->virt)
+ return -ENOMEM;
+
+ memset(&uart, 0, sizeof(uart));
+
+ uart.port.dev = &pdev->dev;
+ uart.port.irq = pdev->irq;
+ uart.port.private_data = pericom;
+ uart.port.iotype = UPIO_PORT;
+ uart.port.uartclk = 921600 * 16;
+ uart.port.flags = UPF_SKIP_TEST | UPF_BOOT_AUTOCONF | UPF_SHARE_IRQ;
+ uart.port.set_divisor = pericom_do_set_divisor;
+ for (i = 0; i < nr && i < maxnr; i++) {
+ unsigned int offset = (i == 3 && nr == 4) ? 0x38 : i * 0x8;
+
+ uart.port.iobase = pci_resource_start(pdev, bar) + offset;
+
+ dev_dbg(&pdev->dev, "Setup PCI port: port %lx, irq %d, type %d\n",
+ uart.port.iobase, uart.port.irq, uart.port.iotype);
+
+ pericom->line[i] = serial8250_register_8250_port(&uart);
+ if (pericom->line[i] < 0) {
+ dev_err(&pdev->dev,
+ "Couldn't register serial port %lx, irq %d, type %d, error %d\n",
+ uart.port.iobase, uart.port.irq,
+ uart.port.iotype, pericom->line[i]);
+ break;
+ }
+ }
+ pericom->nr = i;
+
+ pci_set_drvdata(pdev, pericom);
+ return 0;
+}
+
+static void pericom8250_remove(struct pci_dev *pdev)
+{
+ struct pericom8250 *pericom = pci_get_drvdata(pdev);
+ unsigned int i;
+
+ for (i = 0; i < pericom->nr; i++)
+ serial8250_unregister_port(pericom->line[i]);
+}
+
+static const struct pci_device_id pericom8250_pci_ids[] = {
+ /*
+ * Pericom PI7C9X795[1248] Uno/Dual/Quad/Octal UART
+ * (Only 7954 has an offset jump for port 4)
+ */
+ { PCI_VDEVICE(PERICOM, PCI_DEVICE_ID_PERICOM_PI7C9X7951) },
+ { PCI_VDEVICE(PERICOM, PCI_DEVICE_ID_PERICOM_PI7C9X7952) },
+ { PCI_VDEVICE(PERICOM, PCI_DEVICE_ID_PERICOM_PI7C9X7954) },
+ { PCI_VDEVICE(PERICOM, PCI_DEVICE_ID_PERICOM_PI7C9X7958) },
+
+ /*
+ * ACCES I/O Products quad
+ * (Only 7954 has an offset jump for port 4)
+ */
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_PCIE_COM_2SDB) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_MPCIE_COM_2S) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_PCIE_COM422_4) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_PCIE_COM485_4) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_PCIE_COM_4SDB) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_MPCIE_COM_4S) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_PCIE_COM422_8) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_PCIE_COM485_8) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_PCIE_COM232_2DB) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_MPCIE_COM232_2) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_PCIE_COM232_4) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_PCIE_COM232_4DB) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_MPCIE_COM232_4) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_PCIE_COM232_8) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_PCIE_COM_2SMDB) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_MPCIE_COM_2SM) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_PCIE_COM_4SM) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_PCIE_COM_4SMDB) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_MPCIE_COM_4SM) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_PCIE_COM_8SM) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_MPCIE_ICM485_1) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_MPCIE_ICM422_2) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_MPCIE_ICM485_2) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_MPCIE_ICM422_4) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_MPCIE_ICM485_4) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_PCIE_ICM_2S) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_PCIE_ICM_4S) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_PCIE_ICM232_2) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_MPCIE_ICM232_2) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_PCIE_ICM232_4) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_MPCIE_ICM232_4) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_PCIE_ICM_2SM) },
+ { PCI_VDEVICE(ACCESSIO, PCI_DEVICE_ID_ACCESSIO_PCIE_ICM_4SM) },
+ { }
+};
+MODULE_DEVICE_TABLE(pci, pericom8250_pci_ids);
+
+static struct pci_driver pericom8250_pci_driver = {
+ .name = "8250_pericom",
+ .id_table = pericom8250_pci_ids,
+ .probe = pericom8250_probe,
+ .remove = pericom8250_remove,
+};
+module_pci_driver(pericom8250_pci_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("Pericom UART driver");