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 <avorontsov@ru.mvista.com>
Acked-By: Timur Tabi <timur@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
diff --git a/include/asm-powerpc/qe.h b/include/asm-powerpc/qe.h
index c3be6e2..d217288 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 <linux/spinlock.h>
#include <asm/immap_qe.h>
#define QE_NUM_OF_SNUM 28
@@ -74,6 +75,13 @@
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 @@
/* 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 @@
#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 @@
#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