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Date: Sat, 10 Aug 2019 16:18:01 +0300
From: Andy Shevchenko <andy.shevchenko@...il.com>
To: Kai-Heng Feng <kai.heng.feng@...onical.com>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Sudip Mukherjee <sudipm.mukherjee@...il.com>,
"open list:SERIAL DRIVERS" <linux-serial@...r.kernel.org>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
Morris Ku <morris_ku@...ix.com>,
Debbie Liu <debbie_liu@...ix.com>
Subject: Re: [PATCH v2 1/2] serial: 8250_pci: Add support for Sunix serial boards
On Fri, Aug 9, 2019 at 10:05 PM Kai-Heng Feng
<kai.heng.feng@...onical.com> wrote:
>
> Add support to Sunix serial boards with up to 16 ports.
>
> Sunix board need its own setup callback instead of using Timedia's, to
> properly support more than 4 ports.
>
Can you, please, split out the Sunix quirk driver to a separate module
(see examples like: 8250_exar, 8250_lpss, 8250_mid)?
And then with a fewer LOCs add a new boards.
> Cc: Morris Ku <morris_ku@...ix.com>
> Cc: Debbie Liu <debbie_liu@...ix.com>
> Signed-off-by: Kai-Heng Feng <kai.heng.feng@...onical.com>
> ---
> v2:
> use div64_s64() instead of do_div()
>
> drivers/tty/serial/8250/8250_pci.c | 93 +++++++++++++++++++++++------
> drivers/tty/serial/8250/8250_port.c | 8 +++
> include/uapi/linux/serial_core.h | 3 +
> 3 files changed, 87 insertions(+), 17 deletions(-)
>
> diff --git a/drivers/tty/serial/8250/8250_pci.c b/drivers/tty/serial/8250/8250_pci.c
> index 7f740b37700b..b2a5c2228858 100644
> --- a/drivers/tty/serial/8250/8250_pci.c
> +++ b/drivers/tty/serial/8250/8250_pci.c
> @@ -1692,6 +1692,30 @@ pci_wch_ch38x_setup(struct serial_private *priv,
> return pci_default_setup(priv, board, port, idx);
> }
>
> +static int
> +pci_sunix_setup(struct serial_private *priv,
> + const struct pciserial_board *board,
> + struct uart_8250_port *port, int idx)
> +{
> + int bar;
> + int offset;
> +
> + port->port.flags |= UPF_FIXED_TYPE;
> + port->port.type = PORT_SUNIX;
> +
> + if (idx < 4) {
> + bar = 0;
> + offset = idx * board->uart_offset;
> + } else {
> + bar = 1;
> + idx -= 4;
> + idx = div_s64_rem(idx, 4, &offset);
> + offset = idx * 64 + offset * board->uart_offset;
> + }
> +
> + return setup_port(priv, port, bar, offset, 0);
> +}
> +
> #define PCI_VENDOR_ID_SBSMODULARIO 0x124B
> #define PCI_SUBVENDOR_ID_SBSMODULARIO 0x124B
> #define PCI_DEVICE_ID_OCTPRO 0x0001
> @@ -2289,21 +2313,14 @@ static struct pci_serial_quirk pci_serial_quirks[] __refdata = {
> .setup = pci_timedia_setup,
> },
> /*
> - * SUNIX (Timedia) cards
> - * Do not "probe" for these cards as there is at least one combination
> - * card that should be handled by parport_pc that doesn't match the
> - * rule in pci_timedia_probe.
> - * It is part number is MIO5079A but its subdevice ID is 0x0102.
> - * There are some boards with part number SER5037AL that report
> - * subdevice ID 0x0002.
> + * Sunix PCI serial boards
> */
> {
> .vendor = PCI_VENDOR_ID_SUNIX,
> .device = PCI_DEVICE_ID_SUNIX_1999,
> .subvendor = PCI_VENDOR_ID_SUNIX,
> .subdevice = PCI_ANY_ID,
> - .init = pci_timedia_init,
> - .setup = pci_timedia_setup,
> + .setup = pci_sunix_setup,
> },
> /*
> * Xircom cards
> @@ -2757,6 +2774,11 @@ enum pci_board_num_t {
> pbn_pericom_PI7C9X7952,
> pbn_pericom_PI7C9X7954,
> pbn_pericom_PI7C9X7958,
> + pbn_sunix_pci_1s,
> + pbn_sunix_pci_2s,
> + pbn_sunix_pci_4s,
> + pbn_sunix_pci_8s,
> + pbn_sunix_pci_16s,
> };
>
> /*
> @@ -3494,6 +3516,31 @@ static struct pciserial_board pci_boards[] = {
> .base_baud = 921600,
> .uart_offset = 0x8,
> },
> + [pbn_sunix_pci_1s] = {
> + .num_ports = 1,
> + .base_baud = 921600,
> + .uart_offset = 0x8,
> + },
> + [pbn_sunix_pci_2s] = {
> + .num_ports = 2,
> + .base_baud = 921600,
> + .uart_offset = 0x8,
> + },
> + [pbn_sunix_pci_4s] = {
> + .num_ports = 4,
> + .base_baud = 921600,
> + .uart_offset = 0x8,
> + },
> + [pbn_sunix_pci_8s] = {
> + .num_ports = 8,
> + .base_baud = 921600,
> + .uart_offset = 0x8,
> + },
> + [pbn_sunix_pci_16s] = {
> + .num_ports = 16,
> + .base_baud = 921600,
> + .uart_offset = 0x8,
> + },
> };
>
> static const struct pci_device_id blacklist[] = {
> @@ -4532,17 +4579,29 @@ static const struct pci_device_id serial_pci_tbl[] = {
> pbn_b0_bt_1_921600 },
>
> /*
> - * SUNIX (TIMEDIA)
> + * Sunix PCI serial boards
> */
> { PCI_VENDOR_ID_SUNIX, PCI_DEVICE_ID_SUNIX_1999,
> - PCI_VENDOR_ID_SUNIX, PCI_ANY_ID,
> - PCI_CLASS_COMMUNICATION_SERIAL << 8, 0xffff00,
> - pbn_b0_bt_1_921600 },
> -
> + PCI_VENDOR_ID_SUNIX, 0x0001, 0, 0,
> + pbn_sunix_pci_1s },
> { PCI_VENDOR_ID_SUNIX, PCI_DEVICE_ID_SUNIX_1999,
> - PCI_VENDOR_ID_SUNIX, PCI_ANY_ID,
> - PCI_CLASS_COMMUNICATION_MULTISERIAL << 8, 0xffff00,
> - pbn_b0_bt_1_921600 },
> + PCI_VENDOR_ID_SUNIX, 0x0002, 0, 0,
> + pbn_sunix_pci_2s },
> + { PCI_VENDOR_ID_SUNIX, PCI_DEVICE_ID_SUNIX_1999,
> + PCI_VENDOR_ID_SUNIX, 0x0004, 0, 0,
> + pbn_sunix_pci_4s },
> + { PCI_VENDOR_ID_SUNIX, PCI_DEVICE_ID_SUNIX_1999,
> + PCI_VENDOR_ID_SUNIX, 0x0084, 0, 0,
> + pbn_sunix_pci_4s },
> + { PCI_VENDOR_ID_SUNIX, PCI_DEVICE_ID_SUNIX_1999,
> + PCI_VENDOR_ID_SUNIX, 0x0008, 0, 0,
> + pbn_sunix_pci_8s },
> + { PCI_VENDOR_ID_SUNIX, PCI_DEVICE_ID_SUNIX_1999,
> + PCI_VENDOR_ID_SUNIX, 0x0088, 0, 0,
> + pbn_sunix_pci_8s },
> + { PCI_VENDOR_ID_SUNIX, PCI_DEVICE_ID_SUNIX_1999,
> + PCI_VENDOR_ID_SUNIX, 0x0010, 0, 0,
> + pbn_sunix_pci_16s },
>
> /*
> * AFAVLAB serial card, from Harald Welte <laforge@...monks.org>
> diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c
> index c1cec808571b..8900112ed232 100644
> --- a/drivers/tty/serial/8250/8250_port.c
> +++ b/drivers/tty/serial/8250/8250_port.c
> @@ -308,6 +308,14 @@ static const struct serial8250_config uart_config[] = {
> .rxtrig_bytes = {1, 4, 8, 14},
> .flags = UART_CAP_FIFO,
> },
> + [PORT_SUNIX] = {
> + .name = "Sunix",
> + .fifo_size = 128,
> + .tx_loadsz = 128,
> + .fcr = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_10,
> + .rxtrig_bytes = {1, 32, 64, 112},
> + .flags = UART_CAP_FIFO | UART_CAP_SLEEP,
> + },
> };
>
> /* Uart divisor latch read */
> diff --git a/include/uapi/linux/serial_core.h b/include/uapi/linux/serial_core.h
> index 3cc3af1c2ee1..055626ca0a40 100644
> --- a/include/uapi/linux/serial_core.h
> +++ b/include/uapi/linux/serial_core.h
> @@ -290,4 +290,7 @@
> /* SiFive UART */
> #define PORT_SIFIVE_V0 120
>
> +/* Sunix UART */
> +#define PORT_SUNIX 121
> +
> #endif /* _UAPILINUX_SERIAL_CORE_H */
> --
> 2.17.1
>
--
With Best Regards,
Andy Shevchenko
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