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-rw-r--r--arch/powerpc/sysdev/qe_lib/ucc.c251
1 files changed, 251 insertions, 0 deletions
diff --git a/arch/powerpc/sysdev/qe_lib/ucc.c b/arch/powerpc/sysdev/qe_lib/ucc.c
new file mode 100644
index 00000000000000..916c9e5df57faa
--- /dev/null
+++ b/arch/powerpc/sysdev/qe_lib/ucc.c
@@ -0,0 +1,251 @@
+/*
+ * arch/powerpc/sysdev/qe_lib/ucc.c
+ *
+ * QE UCC API Set - UCC specific routines implementations.
+ *
+ * Copyright (C) 2006 Freescale Semicondutor, Inc. All rights reserved.
+ *
+ * Authors: Shlomi Gridish <gridish@freescale.com>
+ * Li Yang <leoli@freescale.com>
+ *
+ * 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 <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/stddef.h>
+
+#include <asm/irq.h>
+#include <asm/io.h>
+#include <asm/immap_qe.h>
+#include <asm/qe.h>
+#include <asm/ucc.h>
+
+static DEFINE_SPINLOCK(ucc_lock);
+
+int ucc_set_qe_mux_mii_mng(int ucc_num)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&ucc_lock, flags);
+ out_be32(&qe_immr->qmx.cmxgcr,
+ ((in_be32(&qe_immr->qmx.cmxgcr) &
+ ~QE_CMXGCR_MII_ENET_MNG) |
+ (ucc_num << QE_CMXGCR_MII_ENET_MNG_SHIFT)));
+ spin_unlock_irqrestore(&ucc_lock, flags);
+
+ return 0;
+}
+
+int ucc_set_type(int ucc_num, struct ucc_common *regs,
+ enum ucc_speed_type speed)
+{
+ u8 guemr = 0;
+
+ /* check if the UCC number is in range. */
+ if ((ucc_num > UCC_MAX_NUM - 1) || (ucc_num < 0))
+ return -EINVAL;
+
+ guemr = regs->guemr;
+ guemr &= ~(UCC_GUEMR_MODE_MASK_RX | UCC_GUEMR_MODE_MASK_TX);
+ switch (speed) {
+ case UCC_SPEED_TYPE_SLOW:
+ guemr |= (UCC_GUEMR_MODE_SLOW_RX | UCC_GUEMR_MODE_SLOW_TX);
+ break;
+ case UCC_SPEED_TYPE_FAST:
+ guemr |= (UCC_GUEMR_MODE_FAST_RX | UCC_GUEMR_MODE_FAST_TX);
+ break;
+ default:
+ return -EINVAL;
+ }
+ regs->guemr = guemr;
+
+ return 0;
+}
+
+int ucc_init_guemr(struct ucc_common *regs)
+{
+ u8 guemr = 0;
+
+ if (!regs)
+ return -EINVAL;
+
+ /* Set bit 3 (which is reserved in the GUEMR register) to 1 */
+ guemr = UCC_GUEMR_SET_RESERVED3;
+
+ regs->guemr = guemr;
+
+ return 0;
+}
+
+static void get_cmxucr_reg(int ucc_num, volatile u32 ** p_cmxucr, u8 * reg_num,
+ u8 * shift)
+{
+ switch (ucc_num) {
+ case 0: *p_cmxucr = &(qe_immr->qmx.cmxucr1);
+ *reg_num = 1;
+ *shift = 16;
+ break;
+ case 2: *p_cmxucr = &(qe_immr->qmx.cmxucr1);
+ *reg_num = 1;
+ *shift = 0;
+ break;
+ case 4: *p_cmxucr = &(qe_immr->qmx.cmxucr2);
+ *reg_num = 2;
+ *shift = 16;
+ break;
+ case 6: *p_cmxucr = &(qe_immr->qmx.cmxucr2);
+ *reg_num = 2;
+ *shift = 0;
+ break;
+ case 1: *p_cmxucr = &(qe_immr->qmx.cmxucr3);
+ *reg_num = 3;
+ *shift = 16;
+ break;
+ case 3: *p_cmxucr = &(qe_immr->qmx.cmxucr3);
+ *reg_num = 3;
+ *shift = 0;
+ break;
+ case 5: *p_cmxucr = &(qe_immr->qmx.cmxucr4);
+ *reg_num = 4;
+ *shift = 16;
+ break;
+ case 7: *p_cmxucr = &(qe_immr->qmx.cmxucr4);
+ *reg_num = 4;
+ *shift = 0;
+ break;
+ default:
+ break;
+ }
+}
+
+int ucc_mux_set_grant_tsa_bkpt(int ucc_num, int set, u32 mask)
+{
+ volatile u32 *p_cmxucr;
+ u8 reg_num;
+ u8 shift;
+
+ /* check if the UCC number is in range. */
+ if ((ucc_num > UCC_MAX_NUM - 1) || (ucc_num < 0))
+ return -EINVAL;
+
+ get_cmxucr_reg(ucc_num, &p_cmxucr, &reg_num, &shift);
+
+ if (set)
+ out_be32(p_cmxucr, in_be32(p_cmxucr) | (mask << shift));
+ else
+ out_be32(p_cmxucr, in_be32(p_cmxucr) & ~(mask << shift));
+
+ return 0;
+}
+
+int ucc_set_qe_mux_rxtx(int ucc_num, enum qe_clock clock, enum comm_dir mode)
+{
+ volatile u32 *p_cmxucr;
+ u8 reg_num;
+ u8 shift;
+ u32 clock_bits;
+ u32 clock_mask;
+ int source = -1;
+
+ /* check if the UCC number is in range. */
+ if ((ucc_num > UCC_MAX_NUM - 1) || (ucc_num < 0))
+ return -EINVAL;
+
+ if (!((mode == COMM_DIR_RX) || (mode == COMM_DIR_TX))) {
+ printk(KERN_ERR
+ "ucc_set_qe_mux_rxtx: bad comm mode type passed.");
+ return -EINVAL;
+ }
+
+ get_cmxucr_reg(ucc_num, &p_cmxucr, &reg_num, &shift);
+
+ switch (reg_num) {
+ case 1:
+ switch (clock) {
+ case QE_BRG1: source = 1; break;
+ case QE_BRG2: source = 2; break;
+ case QE_BRG7: source = 3; break;
+ case QE_BRG8: source = 4; break;
+ case QE_CLK9: source = 5; break;
+ case QE_CLK10: source = 6; break;
+ case QE_CLK11: source = 7; break;
+ case QE_CLK12: source = 8; break;
+ case QE_CLK15: source = 9; break;
+ case QE_CLK16: source = 10; break;
+ default: source = -1; break;
+ }
+ break;
+ case 2:
+ switch (clock) {
+ case QE_BRG5: source = 1; break;
+ case QE_BRG6: source = 2; break;
+ case QE_BRG7: source = 3; break;
+ case QE_BRG8: source = 4; break;
+ case QE_CLK13: source = 5; break;
+ case QE_CLK14: source = 6; break;
+ case QE_CLK19: source = 7; break;
+ case QE_CLK20: source = 8; break;
+ case QE_CLK15: source = 9; break;
+ case QE_CLK16: source = 10; break;
+ default: source = -1; break;
+ }
+ break;
+ case 3:
+ switch (clock) {
+ case QE_BRG9: source = 1; break;
+ case QE_BRG10: source = 2; break;
+ case QE_BRG15: source = 3; break;
+ case QE_BRG16: source = 4; break;
+ case QE_CLK3: source = 5; break;
+ case QE_CLK4: source = 6; break;
+ case QE_CLK17: source = 7; break;
+ case QE_CLK18: source = 8; break;
+ case QE_CLK7: source = 9; break;
+ case QE_CLK8: source = 10; break;
+ default: source = -1; break;
+ }
+ break;
+ case 4:
+ switch (clock) {
+ case QE_BRG13: source = 1; break;
+ case QE_BRG14: source = 2; break;
+ case QE_BRG15: source = 3; break;
+ case QE_BRG16: source = 4; break;
+ case QE_CLK5: source = 5; break;
+ case QE_CLK6: source = 6; break;
+ case QE_CLK21: source = 7; break;
+ case QE_CLK22: source = 8; break;
+ case QE_CLK7: source = 9; break;
+ case QE_CLK8: source = 10; break;
+ default: source = -1; break;
+ }
+ break;
+ default:
+ source = -1;
+ break;
+ }
+
+ if (source == -1) {
+ printk(KERN_ERR
+ "ucc_set_qe_mux_rxtx: Bad combination of clock and UCC.");
+ return -ENOENT;
+ }
+
+ clock_bits = (u32) source;
+ clock_mask = QE_CMXUCR_TX_CLK_SRC_MASK;
+ if (mode == COMM_DIR_RX) {
+ clock_bits <<= 4; /* Rx field is 4 bits to left of Tx field */
+ clock_mask <<= 4; /* Rx field is 4 bits to left of Tx field */
+ }
+ clock_bits <<= shift;
+ clock_mask <<= shift;
+
+ out_be32(p_cmxucr, (in_be32(p_cmxucr) & ~clock_mask) | clock_bits);
+
+ return 0;
+}
generated by cgit 1.2.3-korg (git 2.39.0) at 2024-05-13 13:20:07 +0000