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Message-Id: <20231016033705.20669-5-crescentcy.hsieh@moxa.com>
Date: Mon, 16 Oct 2023 11:37:03 +0800
From: Crescent CY Hsieh <crescentcy.hsieh@...a.com>
To: gregkh@...uxfoundation.org, jirislaby@...nel.org
Cc: linux-kernel@...r.kernel.org, linux-serial@...r.kernel.org,
Crescent CY Hsieh <crescentcy.hsieh@...a.com>
Subject: [Patch v2 4/6] tty: serial: 8250: Add support for MOXA Mini PCIe boards
Add support for MOXA Mini PCIe serial boards:
- CP102N: 2 ports | RS232
- CP104N: 4 ports | RS232
- CP112N: 2 ports | RS232/RS422/RS485
- CP114N: 4 ports | RS232/RS422/RS485
- CP132N: 2 ports | RS422/RS485
- CP134N: 4 ports | RS422/RS485
Signed-off-by: Crescent CY Hsieh <crescentcy.hsieh@...a.com>
---
drivers/tty/serial/8250/8250_pci.c | 56 ++++++++++++++++++++++++++++++
1 file changed, 56 insertions(+)
diff --git a/drivers/tty/serial/8250/8250_pci.c b/drivers/tty/serial/8250/8250_pci.c
index dd48b910bb05..d22f727491b5 100644
--- a/drivers/tty/serial/8250/8250_pci.c
+++ b/drivers/tty/serial/8250/8250_pci.c
@@ -83,14 +83,20 @@
#define PCI_DEVICE_ID_MOXA_CP102E 0x1024
#define PCI_DEVICE_ID_MOXA_CP102EL 0x1025
+#define PCI_DEVICE_ID_MOXA_CP102N 0x1027
#define PCI_DEVICE_ID_MOXA_CP104EL_A 0x1045
+#define PCI_DEVICE_ID_MOXA_CP104N 0x1046
+#define PCI_DEVICE_ID_MOXA_CP112N 0x1121
#define PCI_DEVICE_ID_MOXA_CP114EL 0x1144
+#define PCI_DEVICE_ID_MOXA_CP114N 0x1145
#define PCI_DEVICE_ID_MOXA_CP116E_A_A 0x1160
#define PCI_DEVICE_ID_MOXA_CP116E_A_B 0x1161
#define PCI_DEVICE_ID_MOXA_CP118EL_A 0x1182
#define PCI_DEVICE_ID_MOXA_CP118E_A_I 0x1183
#define PCI_DEVICE_ID_MOXA_CP132EL 0x1322
+#define PCI_DEVICE_ID_MOXA_CP132N 0x1323
#define PCI_DEVICE_ID_MOXA_CP134EL_A 0x1342
+#define PCI_DEVICE_ID_MOXA_CP134N 0x1343
#define PCI_DEVICE_ID_MOXA_CP138E_A 0x1381
#define PCI_DEVICE_ID_MOXA_CP168EL_A 0x1683
@@ -1959,6 +1965,49 @@ pci_sunix_setup(struct serial_private *priv,
return setup_port(priv, port, bar, offset, 0);
}
+#define MOXA_PUART_GPIO_EN 0x09
+#define MOXA_PUART_GPIO_OUT 0x0A
+
+#define MOXA_GPIO_PIN2 BIT(2)
+
+static bool pci_moxa_is_mini_pcie(unsigned short device)
+{
+ if (device == PCI_DEVICE_ID_MOXA_CP102N ||
+ device == PCI_DEVICE_ID_MOXA_CP104N ||
+ device == PCI_DEVICE_ID_MOXA_CP112N ||
+ device == PCI_DEVICE_ID_MOXA_CP114N ||
+ device == PCI_DEVICE_ID_MOXA_CP132N ||
+ device == PCI_DEVICE_ID_MOXA_CP134N)
+ return true;
+
+ return false;
+}
+
+static int pci_moxa_init(struct pci_dev *dev)
+{
+ unsigned short device = dev->device;
+ resource_size_t iobar_addr = pci_resource_start(dev, 2);
+ unsigned int num_ports = (device & 0x00F0) >> 4;
+ u8 val;
+
+ /*
+ * Enable hardware buffer to prevent break signal output when system boots up.
+ * This hardware buffer is only supported on Mini PCIe series.
+ */
+ if (pci_moxa_is_mini_pcie(device)) {
+ /* Set GPIO direction */
+ val = inb(iobar_addr + MOXA_PUART_GPIO_EN);
+ val |= MOXA_GPIO_PIN2;
+ outb(val, iobar_addr + MOXA_PUART_GPIO_EN);
+ /* Enable low GPIO */
+ val = inb(iobar_addr + MOXA_PUART_GPIO_OUT);
+ val &= ~MOXA_GPIO_PIN2;
+ outb(val, iobar_addr + MOXA_PUART_GPIO_OUT);
+ }
+
+ return num_ports;
+}
+
static int
pci_moxa_setup(struct serial_private *priv,
const struct pciserial_board *board,
@@ -2635,6 +2684,7 @@ static struct pci_serial_quirk pci_serial_quirks[] = {
.device = PCI_ANY_ID,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
+ .init = pci_moxa_init,
.setup = pci_moxa_setup,
},
{
@@ -5351,14 +5401,20 @@ static const struct pci_device_id serial_pci_tbl[] = {
*/
{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102E), pbn_moxa_2 },
{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102EL), pbn_moxa_2 },
+ { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102N), pbn_moxa_2 },
{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104EL_A), pbn_moxa_4 },
+ { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104N), pbn_moxa_4 },
+ { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP112N), pbn_moxa_2 },
{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP114EL), pbn_moxa_4 },
+ { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP114N), pbn_moxa_4 },
{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP116E_A_A), pbn_moxa_8 },
{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP116E_A_B), pbn_moxa_8 },
{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP118EL_A), pbn_moxa_8 },
{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP118E_A_I), pbn_moxa_8 },
{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP132EL), pbn_moxa_2 },
+ { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP132N), pbn_moxa_2 },
{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP134EL_A), pbn_moxa_4 },
+ { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP134N), pbn_moxa_4 },
{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP138E_A), pbn_moxa_8 },
{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP168EL_A), pbn_moxa_8 },
--
2.34.1
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