From 5e41486c408eb4206aee09303631427f57771691 Mon Sep 17 00:00:00 2001 From: Anton Vorontsov Date: Fri, 23 May 2008 20:38:56 +0400 Subject: [PATCH] powerpc/QE: add support for QE USB clocks routing This patch adds a function to the qe_lib to setup QE USB clocks routing. To setup clocks safely, cmxgcr register needs locking, so I just reused ucc_lock since it was used only to protect cmxgcr. The idea behind placing clocks routing functions into the qe_lib is that later we'll hopefully switch to the generic Linux Clock API, thus, for example, FHCI driver may be used for QE and CPM chips without nasty #ifdefs. This patch also fixes QE_USB_RESTART_TX command definition in the qe.h. Signed-off-by: Anton Vorontsov Acked-By: Timur Tabi Signed-off-by: Kumar Gala --- arch/powerpc/sysdev/qe_lib/Kconfig | 4 +++ arch/powerpc/sysdev/qe_lib/Makefile | 1 + arch/powerpc/sysdev/qe_lib/ucc.c | 7 ++-- arch/powerpc/sysdev/qe_lib/usb.c | 55 +++++++++++++++++++++++++++++ include/asm-powerpc/qe.h | 23 +++++++++++- 5 files changed, 86 insertions(+), 4 deletions(-) create mode 100644 arch/powerpc/sysdev/qe_lib/usb.c diff --git a/arch/powerpc/sysdev/qe_lib/Kconfig b/arch/powerpc/sysdev/qe_lib/Kconfig index adc66212a41..76ffbc48d4b 100644 --- a/arch/powerpc/sysdev/qe_lib/Kconfig +++ b/arch/powerpc/sysdev/qe_lib/Kconfig @@ -20,3 +20,7 @@ config UCC bool default y if UCC_FAST || UCC_SLOW +config QE_USB + bool + help + QE USB Host Controller support diff --git a/arch/powerpc/sysdev/qe_lib/Makefile b/arch/powerpc/sysdev/qe_lib/Makefile index 874fe1a5b1c..e9ff8884f74 100644 --- a/arch/powerpc/sysdev/qe_lib/Makefile +++ b/arch/powerpc/sysdev/qe_lib/Makefile @@ -6,3 +6,4 @@ obj-$(CONFIG_QUICC_ENGINE)+= qe.o qe_ic.o qe_io.o obj-$(CONFIG_UCC) += ucc.o obj-$(CONFIG_UCC_SLOW) += ucc_slow.o obj-$(CONFIG_UCC_FAST) += ucc_fast.o +obj-$(CONFIG_QE_USB) += usb.o diff --git a/arch/powerpc/sysdev/qe_lib/ucc.c b/arch/powerpc/sysdev/qe_lib/ucc.c index 0e348d9af8a..d3c7f5af9bc 100644 --- a/arch/powerpc/sysdev/qe_lib/ucc.c +++ b/arch/powerpc/sysdev/qe_lib/ucc.c @@ -26,7 +26,8 @@ #include #include -static DEFINE_SPINLOCK(ucc_lock); +DEFINE_SPINLOCK(cmxgcr_lock); +EXPORT_SYMBOL(cmxgcr_lock); int ucc_set_qe_mux_mii_mng(unsigned int ucc_num) { @@ -35,10 +36,10 @@ int ucc_set_qe_mux_mii_mng(unsigned int ucc_num) if (ucc_num > UCC_MAX_NUM - 1) return -EINVAL; - spin_lock_irqsave(&ucc_lock, flags); + spin_lock_irqsave(&cmxgcr_lock, flags); clrsetbits_be32(&qe_immr->qmx.cmxgcr, QE_CMXGCR_MII_ENET_MNG, ucc_num << QE_CMXGCR_MII_ENET_MNG_SHIFT); - spin_unlock_irqrestore(&ucc_lock, flags); + spin_unlock_irqrestore(&cmxgcr_lock, flags); return 0; } diff --git a/arch/powerpc/sysdev/qe_lib/usb.c b/arch/powerpc/sysdev/qe_lib/usb.c new file mode 100644 index 00000000000..8105462078e --- /dev/null +++ b/arch/powerpc/sysdev/qe_lib/usb.c @@ -0,0 +1,55 @@ +/* + * QE USB routines + * + * Copyright (c) Freescale Semicondutor, Inc. 2006. + * Shlomi Gridish + * Jerry Huang + * Copyright (c) MontaVista Software, Inc. 2008. + * Anton Vorontsov + * + * This program is free software; you can redistribute it and/or modify it + * 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. + */ + +#include +#include +#include +#include +#include + +int qe_usb_clock_set(enum qe_clock clk, int rate) +{ + struct qe_mux __iomem *mux = &qe_immr->qmx; + unsigned long flags; + u32 val; + + switch (clk) { + case QE_CLK3: val = QE_CMXGCR_USBCS_CLK3; break; + case QE_CLK5: val = QE_CMXGCR_USBCS_CLK5; break; + case QE_CLK7: val = QE_CMXGCR_USBCS_CLK7; break; + case QE_CLK9: val = QE_CMXGCR_USBCS_CLK9; break; + case QE_CLK13: val = QE_CMXGCR_USBCS_CLK13; break; + case QE_CLK17: val = QE_CMXGCR_USBCS_CLK17; break; + case QE_CLK19: val = QE_CMXGCR_USBCS_CLK19; break; + case QE_CLK21: val = QE_CMXGCR_USBCS_CLK21; break; + case QE_BRG9: val = QE_CMXGCR_USBCS_BRG9; break; + case QE_BRG10: val = QE_CMXGCR_USBCS_BRG10; break; + default: + pr_err("%s: requested unknown clock %d\n", __func__, clk); + return -EINVAL; + } + + if (qe_clock_is_brg(clk)) + qe_setbrg(clk, rate, 1); + + spin_lock_irqsave(&cmxgcr_lock, flags); + + clrsetbits_be32(&mux->cmxgcr, QE_CMXGCR_USBCS, val); + + spin_unlock_irqrestore(&cmxgcr_lock, flags); + + return 0; +} +EXPORT_SYMBOL(qe_usb_clock_set); diff --git a/include/asm-powerpc/qe.h b/include/asm-powerpc/qe.h index c3be6e2e149..d217288ec6b 100644 --- a/include/asm-powerpc/qe.h +++ b/include/asm-powerpc/qe.h @@ -16,6 +16,7 @@ #define _ASM_POWERPC_QE_H #ifdef __KERNEL__ +#include #include #define QE_NUM_OF_SNUM 28 @@ -74,6 +75,13 @@ enum qe_clock { QE_CLK_DUMMY }; +static inline bool qe_clock_is_brg(enum qe_clock clk) +{ + return clk >= QE_BRG1 && clk <= QE_BRG16; +} + +extern spinlock_t cmxgcr_lock; + /* Export QE common operations */ extern void qe_reset(void); extern int par_io_init(struct device_node *np); @@ -156,6 +164,9 @@ int qe_upload_firmware(const struct qe_firmware *firmware); /* Obtain information on the uploaded firmware */ struct qe_firmware_info *qe_get_firmware_info(void); +/* QE USB */ +int qe_usb_clock_set(enum qe_clock clk, int rate); + /* Buffer descriptors */ struct qe_bd { __be16 status; @@ -254,6 +265,16 @@ enum comm_dir { #define QE_CMXGCR_MII_ENET_MNG 0x00007000 #define QE_CMXGCR_MII_ENET_MNG_SHIFT 12 #define QE_CMXGCR_USBCS 0x0000000f +#define QE_CMXGCR_USBCS_CLK3 0x1 +#define QE_CMXGCR_USBCS_CLK5 0x2 +#define QE_CMXGCR_USBCS_CLK7 0x3 +#define QE_CMXGCR_USBCS_CLK9 0x4 +#define QE_CMXGCR_USBCS_CLK13 0x5 +#define QE_CMXGCR_USBCS_CLK17 0x6 +#define QE_CMXGCR_USBCS_CLK19 0x7 +#define QE_CMXGCR_USBCS_CLK21 0x8 +#define QE_CMXGCR_USBCS_BRG9 0x9 +#define QE_CMXGCR_USBCS_BRG10 0xa /* QE CECR Commands. */ @@ -283,7 +304,7 @@ enum comm_dir { #define QE_HPAC_START_TX 0x0000060b #define QE_HPAC_START_RX 0x0000070b #define QE_USB_STOP_TX 0x0000000a -#define QE_USB_RESTART_TX 0x0000000b +#define QE_USB_RESTART_TX 0x0000000c #define QE_QMC_STOP_TX 0x0000000c #define QE_QMC_STOP_RX 0x0000000d #define QE_SS7_SU_FIL_RESET 0x0000000e -- 2.41.1