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8250/16?50: Add support for Broadcom TruManage redirected serial port

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Add support for the UART device present in Broadcom TruManage capable
NetXtreme chips (ie: 5761m 5762, and 5725).

This implementation has a hidden transmit FIFO, so running in single-byte
interrupt mode results in too many interrupts.  The UART_CAP_HFIFO
capability was added to track this.  It continues to reload the THR as long
as the THRE and TSRE bits are set in the LSR up to a specified limit (1024
is used here).

Signed-off-by: Stephen Hurd <shurd@broadcom.com>
Signed-off-by: Michael Chan <mchan@broadcom.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Stephen Hurd 2013-01-17 14:14:53 -08:00 committed by Greg Kroah-Hartman
parent ded2f295a3
commit ebebd49a8e
4 changed files with 52 additions and 1 deletions
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11
drivers/tty/serial/8250/8250.c
View File

@ -300,6 +300,12 @@ static const struct serial8250_config uart_config[] = {
UART_FCR_R_TRIG_00 | UART_FCR_T_TRIG_00,
.flags = UART_CAP_FIFO,
},
[PORT_BRCM_TRUMANAGE] = {
.name = "TruManage",
.fifo_size = 1,
.tx_loadsz = 1024,
.flags = UART_CAP_HFIFO,
},
[PORT_8250_CIR] = {
.name = "CIR port"
}
@ -1490,6 +1496,11 @@ void serial8250_tx_chars(struct uart_8250_port *up)
port->icount.tx++;
if (uart_circ_empty(xmit))
break;
if (up->capabilities & UART_CAP_HFIFO) {
if ((serial_port_in(port, UART_LSR) & BOTH_EMPTY) !=
BOTH_EMPTY)
break;
}
} while (--count > 0);
if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)

1
drivers/tty/serial/8250/8250.h
View File

@ -40,6 +40,7 @@ struct serial8250_config {
#define UART_CAP_AFE (1 << 11) /* MCR-based hw flow control */
#define UART_CAP_UUE (1 << 12) /* UART needs IER bit 6 set (Xscale) */
#define UART_CAP_RTOIE (1 << 13) /* UART needs IER bit 4 set (Xscale, Tegra) */
#define UART_CAP_HFIFO (1 << 14) /* UART has a "hidden" FIFO */
#define UART_BUG_QUOT (1 << 0) /* UART has buggy quot LSB */
#define UART_BUG_TXEN (1 << 1) /* UART has buggy TX IIR status */

38
drivers/tty/serial/8250/8250_pci.c
View File

@ -1085,6 +1085,18 @@ pci_omegapci_setup(struct serial_private *priv,
return setup_port(priv, port, 2, idx * 8, 0);
}
static int
pci_brcm_trumanage_setup(struct serial_private *priv,
const struct pciserial_board *board,
struct uart_8250_port *port, int idx)
{
int ret = pci_default_setup(priv, board, port, idx);
port->port.type = PORT_BRCM_TRUMANAGE;
port->port.flags = (port->port.flags | UPF_FIXED_PORT | UPF_FIXED_TYPE);
return ret;
}
static int skip_tx_en_setup(struct serial_private *priv,
const struct pciserial_board *board,
struct uart_8250_port *port, int idx)
@ -1304,6 +1316,7 @@ pci_wch_ch353_setup(struct serial_private *priv,
#define PCI_DEVICE_ID_COMMTECH_4224PCIE 0x0020
#define PCI_DEVICE_ID_COMMTECH_4228PCIE 0x0021
#define PCI_DEVICE_ID_COMMTECH_4222PCIE 0x0022
#define PCI_DEVICE_ID_BROADCOM_TRUMANAGE 0x160a
/* Unknown vendors/cards - this should not be in linux/pci_ids.h */
@ -1953,6 +1966,17 @@ static struct pci_serial_quirk pci_serial_quirks[] __refdata = {
.subdevice = PCI_ANY_ID,
.setup = pci_xr17v35x_setup,
},
/*
* Broadcom TruManage (NetXtreme)
*/
{
.vendor = PCI_VENDOR_ID_BROADCOM,
.device = PCI_DEVICE_ID_BROADCOM_TRUMANAGE,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
.setup = pci_brcm_trumanage_setup,
},
/*
* Default "match everything" terminator entry
*/
@ -2148,6 +2172,7 @@ enum pci_board_num_t {
pbn_ce4100_1_115200,
pbn_omegapci,
pbn_NETMOS9900_2s_115200,
pbn_brcm_trumanage,
};
/*
@ -2892,6 +2917,12 @@ static struct pciserial_board pci_boards[] = {
.num_ports = 2,
.base_baud = 115200,
},
[pbn_brcm_trumanage] = {
.flags = FL_BASE0,
.num_ports = 1,
.reg_shift = 2,
.base_baud = 115200,
},
};
static const struct pci_device_id blacklist[] = {
@ -4470,6 +4501,13 @@ static struct pci_device_id serial_pci_tbl[] = {
PCI_ANY_ID, PCI_ANY_ID, 0, 0,
pbn_omegapci },
/*
* Broadcom TruManage
*/
{ PCI_VENDOR_ID_BROADCOM, PCI_DEVICE_ID_BROADCOM_TRUMANAGE,
PCI_ANY_ID, PCI_ANY_ID, 0, 0,
pbn_brcm_trumanage },
/*
* AgeStar as-prs2-009
*/

3
include/uapi/linux/serial_core.h
View File

@ -50,7 +50,8 @@
#define PORT_LPC3220 22 /* NXP LPC32xx SoC "Standard" UART */
#define PORT_8250_CIR 23 /* CIR infrared port, has its own driver */
#define PORT_XR17V35X 24 /* Exar XR17V35x UARTs */
#define PORT_MAX_8250 24 /* max port ID */
#define PORT_BRCM_TRUMANAGE 24
#define PORT_MAX_8250 25 /* max port ID */
/*
* ARM specific type numbers. These are not currently guaranteed