From 845cf505cebd159b57b3ae3b25e9ad0eb036f9ab Mon Sep 17 00:00:00 2001 From: Timur Tabi Date: Wed, 9 Jan 2008 17:35:05 -0600 Subject: [PATCH] [POWERPC] QE: Add support for Freescale QUICCEngine UART Add support for UART serial ports using a Freescale QUICCEngine. Update booting-without-of.txt to define new properties for a QE UART node. Update the MPC8323E-MDS device tree to add UCC5 as a UART. Update the QE library to support slow UCC devices and modules. Signed-off-by: Timur Tabi Signed-off-by: Kumar Gala --- Documentation/powerpc/booting-without-of.txt | 9 +++- arch/powerpc/boot/dts/mpc832x_mds.dts | 50 ++++++++++++++++++++ arch/powerpc/sysdev/qe_lib/Kconfig | 2 +- arch/powerpc/sysdev/qe_lib/ucc_slow.c | 10 +++- 4 files changed, 68 insertions(+), 3 deletions(-) diff --git a/Documentation/powerpc/booting-without-of.txt b/Documentation/powerpc/booting-without-of.txt index e8c67c9015b3..a13d4578319c 100644 --- a/Documentation/powerpc/booting-without-of.txt +++ b/Documentation/powerpc/booting-without-of.txt @@ -1619,7 +1619,7 @@ platforms are moved over to use the flattened-device-tree model. Required properties: - device_type : should be "network", "hldc", "uart", "transparent" - "bisync" or "atm". + "bisync", "atm", or "serial". - compatible : could be "ucc_geth" or "fsl_atm" and so on. - model : should be "UCC". - device-id : the ucc number(1-8), corresponding to UCCx in UM. @@ -1632,6 +1632,13 @@ platforms are moved over to use the flattened-device-tree model. - interrupt-parent : the phandle for the interrupt controller that services interrupts for this device. - pio-handle : The phandle for the Parallel I/O port configuration. + - port-number : for UART drivers, the port number to use, between 0 and 3. + This usually corresponds to the /dev/ttyQE device, e.g. <0> = /dev/ttyQE0. + The port number is added to the minor number of the device. Unlike the + CPM UART driver, the port-number is required for the QE UART driver. + - soft-uart : for UART drivers, if specified this means the QE UART device + driver should use "Soft-UART" mode, which is needed on some SOCs that have + broken UART hardware. Soft-UART is provided via a microcode upload. - rx-clock-name: the UCC receive clock source "none": clock source is disabled "brg1" through "brg16": clock source is BRG1-BRG16, respectively diff --git a/arch/powerpc/boot/dts/mpc832x_mds.dts b/arch/powerpc/boot/dts/mpc832x_mds.dts index 5093ef304ff0..690252456d3d 100644 --- a/arch/powerpc/boot/dts/mpc832x_mds.dts +++ b/arch/powerpc/boot/dts/mpc832x_mds.dts @@ -7,6 +7,18 @@ * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. + + * To enable external serial I/O on a Freescale MPC 8323 SYS/MDS board, do + * this: + * + * 1) On chip U61, lift (disconnect) pins 21 (TXD) and 22 (RXD) from the board. + * 2) Solder a wire from U61-21 to P19A-23. P19 is a grid of pins on the board + * next to the serial ports. + * 3) Solder a wire from U61-22 to P19K-22. + * + * Note that there's a typo in the schematic. The board labels the last column + * of pins "P19K", but in the schematic, that column is called "P19J". So if + * you're going by the schematic, the pin is called "P19J-K22". */ / { @@ -169,6 +181,23 @@ 1 1e 1 0 1 0 /* TX_EN */ 1 1f 2 0 1 0>;/* CRS */ }; + pio5: ucc_pin@05 { + pio-map = < + /* + * open has + * port pin dir drain sel irq + */ + 2 0 1 0 2 0 /* TxD5 */ + 2 8 2 0 2 0 /* RxD5 */ + + 2 1d 2 0 0 0 /* CTS5 */ + 2 1f 1 0 2 0 /* RTS5 */ + + 2 18 2 0 0 0 /* CD */ + + >; + }; + }; }; @@ -176,6 +205,7 @@ #address-cells = <1>; #size-cells = <1>; device_type = "qe"; + compatible = "fsl,qe"; model = "QE"; ranges = <0 e0100000 00100000>; reg = ; @@ -249,6 +279,26 @@ pio-handle = < &pio4 >; }; + ucc@2400 { + device_type = "serial"; + compatible = "ucc_uart"; + model = "UCC"; + device-id = <5>; /* The UCC number, 1-7*/ + port-number = <0>; /* Which ttyQEx device */ + soft-uart; /* We need Soft-UART */ + reg = <2400 200>; + interrupts = <28>; /* From Table 18-12 */ + interrupt-parent = < &qeic >; + /* + * For Soft-UART, we need to set TX to 1X, which + * means specifying separate clock sources. + */ + rx-clock-name = "brg5"; + tx-clock-name = "brg6"; + pio-handle = < &pio5 >; + }; + + mdio@2320 { #address-cells = <1>; #size-cells = <0>; diff --git a/arch/powerpc/sysdev/qe_lib/Kconfig b/arch/powerpc/sysdev/qe_lib/Kconfig index f611d344a126..adc66212a419 100644 --- a/arch/powerpc/sysdev/qe_lib/Kconfig +++ b/arch/powerpc/sysdev/qe_lib/Kconfig @@ -4,7 +4,7 @@ config UCC_SLOW bool - default n + default y if SERIAL_QE help This option provides qe_lib support to UCC slow protocols: UART, BISYNC, QMC diff --git a/arch/powerpc/sysdev/qe_lib/ucc_slow.c b/arch/powerpc/sysdev/qe_lib/ucc_slow.c index 0174b3aeef8f..b2870b208ddb 100644 --- a/arch/powerpc/sysdev/qe_lib/ucc_slow.c +++ b/arch/powerpc/sysdev/qe_lib/ucc_slow.c @@ -19,6 +19,7 @@ #include #include #include +#include #include #include @@ -41,6 +42,7 @@ u32 ucc_slow_get_qe_cr_subblock(int uccs_num) default: return QE_CR_SUBBLOCK_INVALID; } } +EXPORT_SYMBOL(ucc_slow_get_qe_cr_subblock); void ucc_slow_poll_transmitter_now(struct ucc_slow_private * uccs) { @@ -56,6 +58,7 @@ void ucc_slow_graceful_stop_tx(struct ucc_slow_private * uccs) qe_issue_cmd(QE_GRACEFUL_STOP_TX, id, QE_CR_PROTOCOL_UNSPECIFIED, 0); } +EXPORT_SYMBOL(ucc_slow_graceful_stop_tx); void ucc_slow_stop_tx(struct ucc_slow_private * uccs) { @@ -65,6 +68,7 @@ void ucc_slow_stop_tx(struct ucc_slow_private * uccs) id = ucc_slow_get_qe_cr_subblock(us_info->ucc_num); qe_issue_cmd(QE_STOP_TX, id, QE_CR_PROTOCOL_UNSPECIFIED, 0); } +EXPORT_SYMBOL(ucc_slow_stop_tx); void ucc_slow_restart_tx(struct ucc_slow_private * uccs) { @@ -74,6 +78,7 @@ void ucc_slow_restart_tx(struct ucc_slow_private * uccs) id = ucc_slow_get_qe_cr_subblock(us_info->ucc_num); qe_issue_cmd(QE_RESTART_TX, id, QE_CR_PROTOCOL_UNSPECIFIED, 0); } +EXPORT_SYMBOL(ucc_slow_restart_tx); void ucc_slow_enable(struct ucc_slow_private * uccs, enum comm_dir mode) { @@ -94,6 +99,7 @@ void ucc_slow_enable(struct ucc_slow_private * uccs, enum comm_dir mode) } out_be32(&us_regs->gumr_l, gumr_l); } +EXPORT_SYMBOL(ucc_slow_enable); void ucc_slow_disable(struct ucc_slow_private * uccs, enum comm_dir mode) { @@ -114,6 +120,7 @@ void ucc_slow_disable(struct ucc_slow_private * uccs, enum comm_dir mode) } out_be32(&us_regs->gumr_l, gumr_l); } +EXPORT_SYMBOL(ucc_slow_disable); /* Initialize the UCC for Slow operations * @@ -347,6 +354,7 @@ int ucc_slow_init(struct ucc_slow_info * us_info, struct ucc_slow_private ** ucc *uccs_ret = uccs; return 0; } +EXPORT_SYMBOL(ucc_slow_init); void ucc_slow_free(struct ucc_slow_private * uccs) { @@ -366,5 +374,5 @@ void ucc_slow_free(struct ucc_slow_private * uccs) kfree(uccs); } - +EXPORT_SYMBOL(ucc_slow_free); -- 2.20.1