AuxXxilium/linux_dsm_epyc7002
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linux_dsm_epyc7002/drivers/soc/fsl/qe/ucc.c
Thomas Gleixner 2874c5fd28 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 
Based on 1 normalized pattern(s):

  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

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 3029 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:32 -07:00

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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* arch/powerpc/sysdev/qe_lib/ucc.c
*
* QE UCC API Set - UCC specific routines implementations.
*
* Copyright (C) 2006 Freescale Semiconductor, Inc. All rights reserved.
*
* Authors: Shlomi Gridish <gridish@freescale.com>
* Li Yang <leoli@freescale.com>
*/
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/stddef.h>
#include <linux/spinlock.h>
#include <linux/export.h>
#include <asm/irq.h>
#include <asm/io.h>
#include <soc/fsl/qe/immap_qe.h>
#include <soc/fsl/qe/qe.h>
#include <soc/fsl/qe/ucc.h>
#define UCC_TDM_NUM 8
#define RX_SYNC_SHIFT_BASE 30
#define TX_SYNC_SHIFT_BASE 14
#define RX_CLK_SHIFT_BASE 28
#define TX_CLK_SHIFT_BASE 12
int ucc_set_qe_mux_mii_mng(unsigned int ucc_num)
{
unsigned long flags;
if (ucc_num > UCC_MAX_NUM - 1)
return -EINVAL;
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(&cmxgcr_lock, flags);
return 0;
}
EXPORT_SYMBOL(ucc_set_qe_mux_mii_mng);
/* Configure the UCC to either Slow or Fast.
*
* A given UCC can be figured to support either "slow" devices (e.g. UART)
* or "fast" devices (e.g. Ethernet).
*
* 'ucc_num' is the UCC number, from 0 - 7.
*
* This function also sets the UCC_GUEMR_SET_RESERVED3 bit because that bit
* must always be set to 1.
*/
int ucc_set_type(unsigned int ucc_num, enum ucc_speed_type speed)
{
u8 __iomem *guemr;
/* The GUEMR register is at the same location for both slow and fast
devices, so we just use uccX.slow.guemr. */
switch (ucc_num) {
case 0: guemr = &qe_immr->ucc1.slow.guemr;
break;
case 1: guemr = &qe_immr->ucc2.slow.guemr;
break;
case 2: guemr = &qe_immr->ucc3.slow.guemr;
break;
case 3: guemr = &qe_immr->ucc4.slow.guemr;
break;
case 4: guemr = &qe_immr->ucc5.slow.guemr;
break;
case 5: guemr = &qe_immr->ucc6.slow.guemr;
break;
case 6: guemr = &qe_immr->ucc7.slow.guemr;
break;
case 7: guemr = &qe_immr->ucc8.slow.guemr;
break;
default:
return -EINVAL;
}
clrsetbits_8(guemr, UCC_GUEMR_MODE_MASK,
UCC_GUEMR_SET_RESERVED3 | speed);
return 0;
}
static void get_cmxucr_reg(unsigned int ucc_num, __be32 __iomem **cmxucr,
unsigned int *reg_num, unsigned int *shift)
{
unsigned int cmx = ((ucc_num & 1) << 1) + (ucc_num > 3);
*reg_num = cmx + 1;
*cmxucr = &qe_immr->qmx.cmxucr[cmx];
*shift = 16 - 8 * (ucc_num & 2);
}
int ucc_mux_set_grant_tsa_bkpt(unsigned int ucc_num, int set, u32 mask)
{
__be32 __iomem *cmxucr;
unsigned int reg_num;
unsigned int shift;
/* check if the UCC number is in range. */
if (ucc_num > UCC_MAX_NUM - 1)
return -EINVAL;
get_cmxucr_reg(ucc_num, &cmxucr, &reg_num, &shift);
if (set)
setbits32(cmxucr, mask << shift);
else
clrbits32(cmxucr, mask << shift);
return 0;
}
int ucc_set_qe_mux_rxtx(unsigned int ucc_num, enum qe_clock clock,
enum comm_dir mode)
{
__be32 __iomem *cmxucr;
unsigned int reg_num;
unsigned int shift;
u32 clock_bits = 0;
/* check if the UCC number is in range. */
if (ucc_num > UCC_MAX_NUM - 1)
return -EINVAL;
/* The communications direction must be RX or TX */
if (!((mode == COMM_DIR_RX) || (mode == COMM_DIR_TX)))
return -EINVAL;
get_cmxucr_reg(ucc_num, &cmxucr, &reg_num, &shift);
switch (reg_num) {
case 1:
switch (clock) {
case QE_BRG1: clock_bits = 1; break;
case QE_BRG2: clock_bits = 2; break;
case QE_BRG7: clock_bits = 3; break;
case QE_BRG8: clock_bits = 4; break;
case QE_CLK9: clock_bits = 5; break;
case QE_CLK10: clock_bits = 6; break;
case QE_CLK11: clock_bits = 7; break;
case QE_CLK12: clock_bits = 8; break;
case QE_CLK15: clock_bits = 9; break;
case QE_CLK16: clock_bits = 10; break;
default: break;
}
break;
case 2:
switch (clock) {
case QE_BRG5: clock_bits = 1; break;
case QE_BRG6: clock_bits = 2; break;
case QE_BRG7: clock_bits = 3; break;
case QE_BRG8: clock_bits = 4; break;
case QE_CLK13: clock_bits = 5; break;
case QE_CLK14: clock_bits = 6; break;
case QE_CLK19: clock_bits = 7; break;
case QE_CLK20: clock_bits = 8; break;
case QE_CLK15: clock_bits = 9; break;
case QE_CLK16: clock_bits = 10; break;
default: break;
}
break;
case 3:
switch (clock) {
case QE_BRG9: clock_bits = 1; break;
case QE_BRG10: clock_bits = 2; break;
case QE_BRG15: clock_bits = 3; break;
case QE_BRG16: clock_bits = 4; break;
case QE_CLK3: clock_bits = 5; break;
case QE_CLK4: clock_bits = 6; break;
case QE_CLK17: clock_bits = 7; break;
case QE_CLK18: clock_bits = 8; break;
case QE_CLK7: clock_bits = 9; break;
case QE_CLK8: clock_bits = 10; break;
case QE_CLK16: clock_bits = 11; break;
default: break;
}
break;
case 4:
switch (clock) {
case QE_BRG13: clock_bits = 1; break;
case QE_BRG14: clock_bits = 2; break;
case QE_BRG15: clock_bits = 3; break;
case QE_BRG16: clock_bits = 4; break;
case QE_CLK5: clock_bits = 5; break;
case QE_CLK6: clock_bits = 6; break;
case QE_CLK21: clock_bits = 7; break;
case QE_CLK22: clock_bits = 8; break;
case QE_CLK7: clock_bits = 9; break;
case QE_CLK8: clock_bits = 10; break;
case QE_CLK16: clock_bits = 11; break;
default: break;
}
break;
default: break;
}
/* Check for invalid combination of clock and UCC number */
if (!clock_bits)
return -ENOENT;
if (mode == COMM_DIR_RX)
shift += 4;
clrsetbits_be32(cmxucr, QE_CMXUCR_TX_CLK_SRC_MASK << shift,
clock_bits << shift);
return 0;
}
static int ucc_get_tdm_common_clk(u32 tdm_num, enum qe_clock clock)
{
int clock_bits = -EINVAL;
/*
* for TDM[0, 1, 2, 3], TX and RX use common
* clock source BRG3,4 and CLK1,2
* for TDM[4, 5, 6, 7], TX and RX use common
* clock source BRG12,13 and CLK23,24
*/
switch (tdm_num) {
case 0:
case 1:
case 2:
case 3:
switch (clock) {
case QE_BRG3:
clock_bits = 1;
break;
case QE_BRG4:
clock_bits = 2;
break;
case QE_CLK1:
clock_bits = 4;
break;
case QE_CLK2:
clock_bits = 5;
break;
default:
break;
}
break;
case 4:
case 5:
case 6:
case 7:
switch (clock) {
case QE_BRG12:
clock_bits = 1;
break;
case QE_BRG13:
clock_bits = 2;
break;
case QE_CLK23:
clock_bits = 4;
break;
case QE_CLK24:
clock_bits = 5;
break;
default:
break;
}
break;
default:
break;
}
return clock_bits;
}
static int ucc_get_tdm_rx_clk(u32 tdm_num, enum qe_clock clock)
{
int clock_bits = -EINVAL;
switch (tdm_num) {
case 0:
switch (clock) {
case QE_CLK3:
clock_bits = 6;
break;
case QE_CLK8:
clock_bits = 7;
break;
default:
break;
}
break;
case 1:
switch (clock) {
case QE_CLK5:
clock_bits = 6;
break;
case QE_CLK10:
clock_bits = 7;
break;
default:
break;
}
break;
case 2:
switch (clock) {
case QE_CLK7:
clock_bits = 6;
break;
case QE_CLK12:
clock_bits = 7;
break;
default:
break;
}
break;
case 3:
switch (clock) {
case QE_CLK9:
clock_bits = 6;
break;
case QE_CLK14:
clock_bits = 7;
break;
default:
break;
}
break;
case 4:
switch (clock) {
case QE_CLK11:
clock_bits = 6;
break;
case QE_CLK16:
clock_bits = 7;
break;
default:
break;
}
break;
case 5:
switch (clock) {
case QE_CLK13:
clock_bits = 6;
break;
case QE_CLK18:
clock_bits = 7;
break;
default:
break;
}
break;
case 6:
switch (clock) {
case QE_CLK15:
clock_bits = 6;
break;
case QE_CLK20:
clock_bits = 7;
break;
default:
break;
}
break;
case 7:
switch (clock) {
case QE_CLK17:
clock_bits = 6;
break;
case QE_CLK22:
clock_bits = 7;
break;
default:
break;
}
break;
}
return clock_bits;
}
static int ucc_get_tdm_tx_clk(u32 tdm_num, enum qe_clock clock)
{
int clock_bits = -EINVAL;
switch (tdm_num) {
case 0:
switch (clock) {
case QE_CLK4:
clock_bits = 6;
break;
case QE_CLK9:
clock_bits = 7;
break;
default:
break;
}
break;
case 1:
switch (clock) {
case QE_CLK6:
clock_bits = 6;
break;
case QE_CLK11:
clock_bits = 7;
break;
default:
break;
}
break;
case 2:
switch (clock) {
case QE_CLK8:
clock_bits = 6;
break;
case QE_CLK13:
clock_bits = 7;
break;
default:
break;
}
break;
case 3:
switch (clock) {
case QE_CLK10:
clock_bits = 6;
break;
case QE_CLK15:
clock_bits = 7;
break;
default:
break;
}
break;
case 4:
switch (clock) {
case QE_CLK12:
clock_bits = 6;
break;
case QE_CLK17:
clock_bits = 7;
break;
default:
break;
}
break;
case 5:
switch (clock) {
case QE_CLK14:
clock_bits = 6;
break;
case QE_CLK19:
clock_bits = 7;
break;
default:
break;
}
break;
case 6:
switch (clock) {
case QE_CLK16:
clock_bits = 6;
break;
case QE_CLK21:
clock_bits = 7;
break;
default:
break;
}
break;
case 7:
switch (clock) {
case QE_CLK18:
clock_bits = 6;
break;
case QE_CLK3:
clock_bits = 7;
break;
default:
break;
}
break;
}
return clock_bits;
}
/* tdm_num: TDM A-H port num is 0-7 */
static int ucc_get_tdm_rxtx_clk(enum comm_dir mode, u32 tdm_num,
enum qe_clock clock)
{
int clock_bits;
clock_bits = ucc_get_tdm_common_clk(tdm_num, clock);
if (clock_bits > 0)
return clock_bits;
if (mode == COMM_DIR_RX)
clock_bits = ucc_get_tdm_rx_clk(tdm_num, clock);
if (mode == COMM_DIR_TX)
clock_bits = ucc_get_tdm_tx_clk(tdm_num, clock);
return clock_bits;
}
static u32 ucc_get_tdm_clk_shift(enum comm_dir mode, u32 tdm_num)
{
u32 shift;
shift = (mode == COMM_DIR_RX) ? RX_CLK_SHIFT_BASE : TX_CLK_SHIFT_BASE;
if (tdm_num < 4)
shift -= tdm_num * 4;
else
shift -= (tdm_num - 4) * 4;
return shift;
}
int ucc_set_tdm_rxtx_clk(u32 tdm_num, enum qe_clock clock,
enum comm_dir mode)
{
int clock_bits;
u32 shift;
struct qe_mux __iomem *qe_mux_reg;
__be32 __iomem *cmxs1cr;
qe_mux_reg = &qe_immr->qmx;
if (tdm_num > 7 || tdm_num < 0)
return -EINVAL;
/* The communications direction must be RX or TX */
if (mode != COMM_DIR_RX && mode != COMM_DIR_TX)
return -EINVAL;
clock_bits = ucc_get_tdm_rxtx_clk(mode, tdm_num, clock);
if (clock_bits < 0)
return -EINVAL;
shift = ucc_get_tdm_clk_shift(mode, tdm_num);
cmxs1cr = (tdm_num < 4) ? &qe_mux_reg->cmxsi1cr_l :
&qe_mux_reg->cmxsi1cr_h;
qe_clrsetbits32(cmxs1cr, QE_CMXUCR_TX_CLK_SRC_MASK << shift,
clock_bits << shift);
return 0;
}
static int ucc_get_tdm_sync_source(u32 tdm_num, enum qe_clock clock,
enum comm_dir mode)
{
int source = -EINVAL;
if (mode == COMM_DIR_RX && clock == QE_RSYNC_PIN) {
source = 0;
return source;
}
if (mode == COMM_DIR_TX && clock == QE_TSYNC_PIN) {
source = 0;
return source;
}
switch (tdm_num) {
case 0:
case 1:
switch (clock) {
case QE_BRG9:
source = 1;
break;
case QE_BRG10:
source = 2;
break;
default:
break;
}
break;
case 2:
case 3:
switch (clock) {
case QE_BRG9:
source = 1;
break;
case QE_BRG11:
source = 2;
break;
default:
break;
}
break;
case 4:
case 5:
switch (clock) {
case QE_BRG13:
source = 1;
break;
case QE_BRG14:
source = 2;
break;
default:
break;
}
break;
case 6:
case 7:
switch (clock) {
case QE_BRG13:
source = 1;
break;
case QE_BRG15:
source = 2;
break;
default:
break;
}
break;
}
return source;
}
static u32 ucc_get_tdm_sync_shift(enum comm_dir mode, u32 tdm_num)
{
u32 shift;
shift = (mode == COMM_DIR_RX) ? RX_SYNC_SHIFT_BASE : TX_SYNC_SHIFT_BASE;
shift -= tdm_num * 2;
return shift;
}
int ucc_set_tdm_rxtx_sync(u32 tdm_num, enum qe_clock clock,
enum comm_dir mode)
{
int source;
u32 shift;
struct qe_mux *qe_mux_reg;
qe_mux_reg = &qe_immr->qmx;
if (tdm_num >= UCC_TDM_NUM)
return -EINVAL;
/* The communications direction must be RX or TX */
if (mode != COMM_DIR_RX && mode != COMM_DIR_TX)
return -EINVAL;
source = ucc_get_tdm_sync_source(tdm_num, clock, mode);
if (source < 0)
return -EINVAL;
shift = ucc_get_tdm_sync_shift(mode, tdm_num);
qe_clrsetbits32(&qe_mux_reg->cmxsi1syr,
QE_CMXUCR_TX_CLK_SRC_MASK << shift,
source << shift);
return 0;
}
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