[PATCH v2 2/5] fsl/qe: setup clock source for TDM mode
Zhao Qiang
qiang.zhao at nxp.com
Thu Jun 2 11:44:58 AEST 2016
Add tdm clock configuration in both qe clock system and ucc
fast controller.
Signed-off-by: Zhao Qiang <qiang.zhao at nxp.com>
---
Changes for v2:
- break codes getting clock_bits and source to smaller functions.
- add __iomem to qe_mux_reg
- add bits operation functions for qe and use it
- retrun -EINVAL when clock_bits is invalid
drivers/soc/fsl/qe/ucc.c | 450 ++++++++++++++++++++++++++++++++++++++++++
drivers/soc/fsl/qe/ucc_fast.c | 36 ++++
include/soc/fsl/qe/qe.h | 16 ++
include/soc/fsl/qe/ucc.h | 4 +
include/soc/fsl/qe/ucc_fast.h | 1 +
5 files changed, 507 insertions(+)
diff --git a/drivers/soc/fsl/qe/ucc.c b/drivers/soc/fsl/qe/ucc.c
index b59d335..5e1a850 100644
--- a/drivers/soc/fsl/qe/ucc.c
+++ b/drivers/soc/fsl/qe/ucc.c
@@ -25,6 +25,12 @@
#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;
@@ -210,3 +216,447 @@ int ucc_set_qe_mux_rxtx(unsigned int ucc_num, enum qe_clock clock,
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 : RX_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;
+}
diff --git a/drivers/soc/fsl/qe/ucc_fast.c b/drivers/soc/fsl/qe/ucc_fast.c
index a768931..83d8d16 100644
--- a/drivers/soc/fsl/qe/ucc_fast.c
+++ b/drivers/soc/fsl/qe/ucc_fast.c
@@ -327,6 +327,42 @@ int ucc_fast_init(struct ucc_fast_info * uf_info, struct ucc_fast_private ** ucc
ucc_fast_free(uccf);
return -EINVAL;
}
+ } else {
+ /* tdm Rx clock routing */
+ if ((uf_info->rx_clock != QE_CLK_NONE) &&
+ ucc_set_tdm_rxtx_clk(uf_info->tdm_num, uf_info->rx_clock,
+ COMM_DIR_RX)) {
+ pr_err("%s: illegal value for RX clock", __func__);
+ ucc_fast_free(uccf);
+ return -EINVAL;
+ }
+
+ /* tdm Tx clock routing */
+ if ((uf_info->tx_clock != QE_CLK_NONE) &&
+ ucc_set_tdm_rxtx_clk(uf_info->tdm_num, uf_info->tx_clock,
+ COMM_DIR_TX)) {
+ pr_err("%s: illegal value for TX clock", __func__);
+ ucc_fast_free(uccf);
+ return -EINVAL;
+ }
+
+ /* tdm Rx sync clock routing */
+ if ((uf_info->rx_sync != QE_CLK_NONE) &&
+ ucc_set_tdm_rxtx_sync(uf_info->tdm_num, uf_info->rx_sync,
+ COMM_DIR_RX)) {
+ pr_err("%s: illegal value for RX clock", __func__);
+ ucc_fast_free(uccf);
+ return -EINVAL;
+ }
+
+ /* tdm Tx sync clock routing */
+ if ((uf_info->tx_sync != QE_CLK_NONE) &&
+ ucc_set_tdm_rxtx_sync(uf_info->tdm_num, uf_info->tx_sync,
+ COMM_DIR_TX)) {
+ pr_err("%s: illegal value for TX clock", __func__);
+ ucc_fast_free(uccf);
+ return -EINVAL;
+ }
}
/* Set interrupt mask register at UCC level. */
diff --git a/include/soc/fsl/qe/qe.h b/include/soc/fsl/qe/qe.h
index f918745..c3b1dc8 100644
--- a/include/soc/fsl/qe/qe.h
+++ b/include/soc/fsl/qe/qe.h
@@ -244,6 +244,22 @@ static inline int qe_alive_during_sleep(void)
#define qe_muram_addr cpm_muram_addr
#define qe_muram_offset cpm_muram_offset
+#define qe_setbits32(_addr, _v) iowrite32be(ioread32be(_addr) | (_v), (_addr))
+#define qe_clrbits32(_addr, _v) iowrite32be(ioread32be(_addr) & ~(_v), (_addr))
+
+#define qe_setbits16(_addr, _v) iowrite16be(ioread16be(_addr) | (_v), (_addr))
+#define qe_clrbits16(_addr, _v) iowrite16be(ioread16be(_addr) & ~(_v), (_addr))
+
+#define qe_setbits8(_addr, _v) iowrite8(ioread8(_addr) | (_v), (_addr))
+#define qe_clrbits8(_addr, _v) iowrite8(ioread8(_addr) & ~(_v), (_addr))
+
+#define qe_clrsetbits32(addr, clear, set) \
+ iowrite32be((ioread32be(addr) & ~(clear)) | (set), (addr))
+#define qe_clrsetbits16(addr, clear, set) \
+ iowrite16be((ioread16be(addr) & ~(clear)) | (set), (addr))
+#define qe_clrsetbits8(addr, clear, set) \
+ iowrite8((ioread8(addr) & ~(clear)) | (set), (addr))
+
/* Structure that defines QE firmware binary files.
*
* See Documentation/powerpc/qe_firmware.txt for a description of these
diff --git a/include/soc/fsl/qe/ucc.h b/include/soc/fsl/qe/ucc.h
index 894f14c..6bbbb59 100644
--- a/include/soc/fsl/qe/ucc.h
+++ b/include/soc/fsl/qe/ucc.h
@@ -41,6 +41,10 @@ int ucc_set_qe_mux_mii_mng(unsigned int ucc_num);
int ucc_set_qe_mux_rxtx(unsigned int ucc_num, enum qe_clock clock,
enum comm_dir mode);
+int ucc_set_tdm_rxtx_clk(unsigned int tdm_num, enum qe_clock clock,
+ enum comm_dir mode);
+int ucc_set_tdm_rxtx_sync(unsigned int tdm_num, enum qe_clock clock,
+ enum comm_dir mode);
int ucc_mux_set_grant_tsa_bkpt(unsigned int ucc_num, int set, u32 mask);
diff --git a/include/soc/fsl/qe/ucc_fast.h b/include/soc/fsl/qe/ucc_fast.h
index 31548b7..b2633b7 100644
--- a/include/soc/fsl/qe/ucc_fast.h
+++ b/include/soc/fsl/qe/ucc_fast.h
@@ -118,6 +118,7 @@ enum ucc_fast_transparent_tcrc {
/* Fast UCC initialization structure */
struct ucc_fast_info {
int ucc_num;
+ int tdm_num;
enum qe_clock rx_clock;
enum qe_clock tx_clock;
enum qe_clock rx_sync;
--
2.1.0.27.g96db324
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