diff options
author | Crescent CY Hsieh <crescentcy.hsieh@moxa.com> | 2023-10-18 12:17:37 +0300 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-10-21 19:30:49 +0300 |
commit | 37058fd5d2394827b07b0551e252283eadf6283a (patch) | |
tree | 68c6bd056939daa5096e148129908ab73d149978 /drivers/tty | |
parent | 5c4148350769a02705e88a3bcf5f9fd997ffe6ff (diff) | |
download | linux-37058fd5d2394827b07b0551e252283eadf6283a.tar.xz |
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@moxa.com>
Reviewed-by: Jiri Slaby <jirislaby@kernel.org>
Link: https://lore.kernel.org/r/20231018091739.10125-5-crescentcy.hsieh@moxa.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty')
-rw-r--r-- | drivers/tty/serial/8250/8250_pci.c | 56 |
1 files changed, 56 insertions, 0 deletions
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 }, |