Messages in this thread Patch in this message |  | | From | Herton Ronaldo Krzesinski <> | Subject | [PATCH 13/93] 8250/16?50: Add support for Broadcom TruManage redirected serial port | Date | Tue, 5 Feb 2013 20:06:02 -0200 |
| |
3.5.7.5 -stable review patch. If anyone has any objections, please let me know.
------------------
From: Stephen Hurd <shurd@broadcom.com>
commit ebebd49a8eab5e9aa1b1f8f1614ccc3c2120f886 upstream.
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> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> [ herton: include/uapi/linux/serial_core.h -> include/linux/serial_core.h, adjust context and port ID defines, adapted for usage of struct uart_port in pci_brcm_trumanage_setup ] Signed-off-by: Herton Ronaldo Krzesinski <herton.krzesinski@canonical.com> --- drivers/tty/serial/8250/8250.c | 11 +++++++++++ drivers/tty/serial/8250/8250.h | 1 + drivers/tty/serial/8250/8250_pci.c | 38 ++++++++++++++++++++++++++++++++++++ include/linux/serial_core.h | 3 ++- 4 files changed, 52 insertions(+), 1 deletion(-)
diff --git a/drivers/tty/serial/8250/8250.c b/drivers/tty/serial/8250/8250.c index 6e1958a..5074eb7 100644 --- a/drivers/tty/serial/8250/8250.c +++ b/drivers/tty/serial/8250/8250.c @@ -282,6 +282,12 @@ static const struct serial8250_config uart_config[] = { .fcr = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_10, .flags = UART_CAP_FIFO | UART_CAP_AFE | UART_CAP_EFR, }, + [PORT_BRCM_TRUMANAGE] = { + .name = "TruManage", + .fifo_size = 1, + .tx_loadsz = 1024, + .flags = UART_CAP_HFIFO, + }, }; /* Uart divisor latch read */ @@ -1427,6 +1433,11 @@ 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) diff --git a/drivers/tty/serial/8250/8250.h b/drivers/tty/serial/8250/8250.h index f9719d1..bb95259 100644 --- a/drivers/tty/serial/8250/8250.h +++ b/drivers/tty/serial/8250/8250.h @@ -73,6 +73,7 @@ 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 */ diff --git a/drivers/tty/serial/8250/8250_pci.c b/drivers/tty/serial/8250/8250_pci.c index 6b8fcb4..e054448 100644 --- a/drivers/tty/serial/8250/8250_pci.c +++ b/drivers/tty/serial/8250/8250_pci.c @@ -1078,6 +1078,18 @@ 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_port *port, int idx) +{ + int ret = pci_default_setup(priv, board, port, idx); + + port->type = PORT_BRCM_TRUMANAGE; + port->flags = (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_port *port, int idx) @@ -1189,6 +1201,7 @@ pci_xr17c154_setup(struct serial_private *priv, #define PCIE_DEVICE_ID_NEO_2_OX_IBM 0x00F6 #define PCI_DEVICE_ID_PLX_CRONYX_OMEGA 0xc001 #define PCI_DEVICE_ID_INTEL_PATSBURG_KT 0x1d3d +#define PCI_DEVICE_ID_BROADCOM_TRUMANAGE 0x160a /* Unknown vendors/cards - this should not be in linux/pci_ids.h */ #define PCI_SUBDEVICE_ID_UNKNOWN_0x1584 0x1584 @@ -1730,6 +1743,17 @@ static struct pci_serial_quirk pci_serial_quirks[] __refdata = { .setup = pci_omegapci_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 */ { @@ -1918,6 +1942,7 @@ enum pci_board_num_t { pbn_ce4100_1_115200, pbn_omegapci, pbn_NETMOS9900_2s_115200, + pbn_brcm_trumanage, }; /* @@ -2624,6 +2649,12 @@ static struct pciserial_board pci_boards[] __devinitdata = { .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 softmodem_blacklist[] = { @@ -4184,6 +4215,13 @@ static struct pci_device_id serial_pci_tbl[] = { pbn_omegapci }, /* + * Broadcom TruManage + */ + { PCI_VENDOR_ID_BROADCOM, PCI_DEVICE_ID_BROADCOM_TRUMANAGE, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, + pbn_brcm_trumanage }, + + /* * These entries match devices with class COMMUNICATION_SERIAL, * COMMUNICATION_MODEM or COMMUNICATION_MULTISERIAL */ diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h index 65db992..a3fa4d5 100644 --- a/include/linux/serial_core.h +++ b/include/linux/serial_core.h @@ -47,7 +47,8 @@ #define PORT_U6_16550A 19 /* ST-Ericsson U6xxx internal UART */ #define PORT_TEGRA 20 /* NVIDIA Tegra internal UART */ #define PORT_XR17D15X 21 /* Exar XR17D15x UART */ -#define PORT_MAX_8250 21 /* max port ID */ +#define PORT_BRCM_TRUMANAGE 22 +#define PORT_MAX_8250 22 /* max port ID */ /* * ARM specific type numbers. These are not currently guaranteed -- 1.7.9.5
|  |