[PATCH v1 14/36] soc: fsl: cpm1: tsa: Add support for QUICC Engine (QE) implementation

[Herve Codina <herve.codina@bootlin.com>]

Add support for the time slot assigner (TSA) available in some
PowerQUICC SoC that uses a QUICC Engine (QE) block such as MPC8321.

The QE TSA is similar to the CPM1 TSA except that it uses UCCs (Unified
Communication Controllers) instead of SCCs (Serial Communication
Controllers).
Also, compared against the CPM1 TSA, this QE TSA can handle up to 4 TDMs
instead of 2 and allows to configure the logic level of sync signals.

At a lower level, compared against CPM TSA implementation, some
registers are slightly different even if same features are present.

Signed-off-by: Herve Codina <herve.codina@bootlin.com>
---
 drivers/soc/fsl/qe/Kconfig |   9 +-
 drivers/soc/fsl/qe/tsa.c   | 329 +++++++++++++++++++++++++++++++++++--
 2 files changed, 319 insertions(+), 19 deletions(-)

diff --git a/drivers/soc/fsl/qe/Kconfig b/drivers/soc/fsl/qe/Kconfig
index fa9ffbed0e92..734744874730 100644
--- a/drivers/soc/fsl/qe/Kconfig
+++ b/drivers/soc/fsl/qe/Kconfig
@@ -31,14 +31,15 @@ config UCC_FAST
 
 config UCC
 	bool
-	default y if UCC_FAST || UCC_SLOW
+	default y if UCC_FAST || UCC_SLOW || (CPM_TSA && QUICC_ENGINE)
 
 config CPM_TSA
-	tristate "CPM TSA support"
+	tristate "CPM/QE TSA support"
 	depends on OF && HAS_IOMEM
-	depends on CPM1 || (CPM && COMPILE_TEST)
+	depends on CPM1 || QUICC_ENGINE || \
+		   ((CPM || QUICC_ENGINE) && COMPILE_TEST)
 	help
-	  Freescale CPM Time Slot Assigner (TSA)
+	  Freescale CPM/QE Time Slot Assigner (TSA)
 	  controller.
 
 	  This option enables support for this
diff --git a/drivers/soc/fsl/qe/tsa.c b/drivers/soc/fsl/qe/tsa.c
index 3b7c9766e25c..ffbca329a226 100644
--- a/drivers/soc/fsl/qe/tsa.c
+++ b/drivers/soc/fsl/qe/tsa.c
@@ -9,6 +9,7 @@
 
 #include "tsa.h"
 #include <dt-bindings/soc/cpm1-fsl,tsa.h>
+#include <dt-bindings/soc/qe-fsl,tsa.h>
 #include <linux/bitfield.h>
 #include <linux/clk.h>
 #include <linux/io.h>
@@ -17,6 +18,7 @@
 #include <linux/of_platform.h>
 #include <linux/platform_device.h>
 #include <linux/slab.h>
+#include <soc/fsl/qe/ucc.h>
 
 /* TSA SI RAM routing tables entry (CPM1) */
 #define TSA_CPM1_SIRAM_ENTRY_LAST	BIT(16)
@@ -31,14 +33,37 @@
 #define TSA_CPM1_SIRAM_ENTRY_CSEL_SMC1	FIELD_PREP_CONST(TSA_CPM1_SIRAM_ENTRY_CSEL_MASK, 0x5)
 #define TSA_CPM1_SIRAM_ENTRY_CSEL_SMC2	FIELD_PREP_CONST(TSA_CPM1_SIRAM_ENTRY_CSEL_MASK, 0x6)
 
-/* SI mode register (32 bits) */
+/* TSA SI RAM routing tables entry (QE) */
+#define TSA_QE_SIRAM_ENTRY_LAST		BIT(0)
+#define TSA_QE_SIRAM_ENTRY_BYTE		BIT(1)
+#define TSA_QE_SIRAM_ENTRY_CNT_MASK	GENMASK(4, 2)
+#define TSA_QE_SIRAM_ENTRY_CNT(x)	FIELD_PREP(TSA_QE_SIRAM_ENTRY_CNT_MASK, x)
+#define TSA_QE_SIRAM_ENTRY_CSEL_MASK	GENMASK(8, 5)
+#define TSA_QE_SIRAM_ENTRY_CSEL_NU	FIELD_PREP_CONST(TSA_QE_SIRAM_ENTRY_CSEL_MASK, 0x0)
+#define TSA_QE_SIRAM_ENTRY_CSEL_UCC5	FIELD_PREP_CONST(TSA_QE_SIRAM_ENTRY_CSEL_MASK, 0x1)
+#define TSA_QE_SIRAM_ENTRY_CSEL_UCC1	FIELD_PREP_CONST(TSA_QE_SIRAM_ENTRY_CSEL_MASK, 0x9)
+#define TSA_QE_SIRAM_ENTRY_CSEL_UCC2	FIELD_PREP_CONST(TSA_QE_SIRAM_ENTRY_CSEL_MASK, 0xa)
+#define TSA_QE_SIRAM_ENTRY_CSEL_UCC3	FIELD_PREP_CONST(TSA_QE_SIRAM_ENTRY_CSEL_MASK, 0xb)
+#define TSA_QE_SIRAM_ENTRY_CSEL_UCC4	FIELD_PREP_CONST(TSA_QE_SIRAM_ENTRY_CSEL_MASK, 0xc)
+
+/*
+ * SI mode register :
+ * - CPM1: 32bit register split in 2*16bit (16bit TDM)
+ * - QE: 4x16bit registers, one per TDM
+ */
 #define TSA_CPM1_SIMODE		0x00
+#define TSA_QE_SIAMR		0x00
+#define TSA_QE_SIBMR		0x02
+#define TSA_QE_SICMR		0x04
+#define TSA_QE_SIDMR		0x06
 #define   TSA_CPM1_SIMODE_SMC2			BIT(31)
 #define   TSA_CPM1_SIMODE_SMC1			BIT(15)
 #define   TSA_CPM1_SIMODE_TDMA_MASK		GENMASK(11, 0)
 #define   TSA_CPM1_SIMODE_TDMA(x)		FIELD_PREP(TSA_CPM1_SIMODE_TDMA_MASK, x)
 #define   TSA_CPM1_SIMODE_TDMB_MASK		GENMASK(27, 16)
 #define   TSA_CPM1_SIMODE_TDMB(x)		FIELD_PREP(TSA_CPM1_SIMODE_TDMB_MASK, x)
+#define     TSA_QE_SIMODE_TDM_SAD_MASK		GENMASK(15, 12)
+#define     TSA_QE_SIMODE_TDM_SAD(x)		FIELD_PREP(TSA_QE_SIMODE_TDM_SAD_MASK, x)
 #define     TSA_CPM1_SIMODE_TDM_MASK		GENMASK(11, 0)
 #define     TSA_SIMODE_TDM_SDM_MASK		GENMASK(11, 10)
 #define       TSA_SIMODE_TDM_SDM_NORM		FIELD_PREP_CONST(TSA_SIMODE_TDM_SDM_MASK, 0x0)
@@ -49,7 +74,8 @@
 #define     TSA_SIMODE_TDM_RFSD(x)		FIELD_PREP(TSA_SIMODE_TDM_RFSD_MASK, x)
 #define     TSA_SIMODE_TDM_DSC			BIT(7)
 #define     TSA_SIMODE_TDM_CRT			BIT(6)
-#define     TSA_CPM1_SIMODE_TDM_STZ		BIT(5)
+#define     TSA_CPM1_SIMODE_TDM_STZ		BIT(5) /* bit 5: STZ in CPM1 */
+#define     TSA_QE_SIMODE_TDM_SL		BIT(5) /* bit 5: SL in QE */
 #define     TSA_SIMODE_TDM_CE			BIT(4)
 #define     TSA_SIMODE_TDM_FE			BIT(3)
 #define     TSA_SIMODE_TDM_GM			BIT(2)
@@ -66,6 +92,13 @@
 #define   TSA_CPM1_SIGMR_RDM_STATIC_TDMAB	FIELD_PREP_CONST(TSA_CPM1_SIGMR_RDM_MASK, 0x2)
 #define   TSA_CPM1_SIGMR_RDM_DYN_TDMAB		FIELD_PREP_CONST(TSA_CPM1_SIGMR_RDM_MASK, 0x3)
 
+/* QE SI global mode register high (8 bits) */
+#define TSA_QE_SIGLMRH	0x08
+#define TSA_QE_SIGLMRH_END	BIT(3)
+#define TSA_QE_SIGLMRH_ENC	BIT(2)
+#define TSA_QE_SIGLMRH_ENB	BIT(1)
+#define TSA_QE_SIGLMRH_ENA	BIT(0)
+
 /* SI clock route register (32 bits) */
 #define TSA_CPM1_SICR	0x0C
 #define   TSA_CPM1_SICR_SCC2_MASK		GENMASK(15, 8)
@@ -113,9 +146,12 @@ struct tsa_tdm {
 
 #define TSA_TDMA	0
 #define TSA_TDMB	1
+#define TSA_TDMC	2 /* QE implementation only */
+#define TSA_TDMD	3 /* QE implementation only */
 
 enum tsa_version {
 	TSA_CPM1 = 1, /* Avoid 0 value */
+	TSA_QE,
 };
 
 struct tsa {
@@ -126,7 +162,15 @@ struct tsa {
 	spinlock_t	lock; /* Lock for read/modify/write sequence */
 	enum tsa_version version;
 	int tdms; /* TSA_TDMx ORed */
+#if IS_ENABLED(CONFIG_QUICC_ENGINE)
+	struct tsa_tdm tdm[4]; /* TDMa, TDMb, TDMc and TDMd */
+#else
 	struct tsa_tdm tdm[2]; /* TDMa and TDMb */
+#endif
+	/* Same number of serials for CPM1 and QE:
+	 * CPM1: NU, 3 SCCs and 2 SMCs
+	 * QE: NU and 5 UCCs
+	 */
 	struct tsa_serial {
 		unsigned int id;
 		struct tsa_serial_info info;
@@ -144,6 +188,11 @@ static inline void tsa_write32(void __iomem *addr, u32 val)
 	iowrite32be(val, addr);
 }
 
+static inline void tsa_write16(void __iomem *addr, u16 val)
+{
+	iowrite16be(val, addr);
+}
+
 static inline void tsa_write8(void __iomem *addr, u8 val)
 {
 	iowrite8(val, addr);
@@ -154,16 +203,34 @@ static inline u32 tsa_read32(void __iomem *addr)
 	return ioread32be(addr);
 }
 
+static inline u16 tsa_read16(void __iomem *addr)
+{
+	return ioread16be(addr);
+}
+
 static inline void tsa_clrbits32(void __iomem *addr, u32 clr)
 {
 	tsa_write32(addr, tsa_read32(addr) & ~clr);
 }
 
+static inline void tsa_clrbits16(void __iomem *addr, u16 clr)
+{
+	tsa_write16(addr, tsa_read16(addr) & ~clr);
+}
+
 static inline void tsa_clrsetbits32(void __iomem *addr, u32 clr, u32 set)
 {
 	tsa_write32(addr, (tsa_read32(addr) & ~clr) | set);
 }
 
+static bool tsa_is_qe(const struct tsa *tsa)
+{
+	if (IS_ENABLED(CONFIG_QUICC_ENGINE) && IS_ENABLED(CONFIG_CPM))
+		return tsa->version == TSA_QE;
+
+	return IS_ENABLED(CONFIG_QUICC_ENGINE);
+}
+
 static int tsa_cpm1_serial_connect(struct tsa_serial *tsa_serial, bool connect)
 {
 	struct tsa *tsa = tsa_serial_get_tsa(tsa_serial);
@@ -197,15 +264,62 @@ static int tsa_cpm1_serial_connect(struct tsa_serial *tsa_serial, bool connect)
 	return 0;
 }
 
+static int tsa_qe_serial_connect(struct tsa_serial *tsa_serial, bool connect)
+{
+	struct tsa *tsa = tsa_serial_get_tsa(tsa_serial);
+	unsigned long flags;
+	int ucc_num;
+	int ret;
+
+	switch (tsa_serial->id) {
+	case FSL_QE_TSA_UCC1:
+		ucc_num = 0;
+		break;
+	case FSL_QE_TSA_UCC2:
+		ucc_num = 1;
+		break;
+	case FSL_QE_TSA_UCC3:
+		ucc_num = 2;
+		break;
+	case FSL_QE_TSA_UCC4:
+		ucc_num = 3;
+		break;
+	case FSL_QE_TSA_UCC5:
+		ucc_num = 4;
+		break;
+	default:
+		dev_err(tsa->dev, "Unsupported serial id %u\n", tsa_serial->id);
+		return -EINVAL;
+	}
+
+	spin_lock_irqsave(&tsa->lock, flags);
+	ret = ucc_set_qe_mux_tsa(ucc_num, connect);
+	spin_unlock_irqrestore(&tsa->lock, flags);
+	if (ret) {
+		dev_err(tsa->dev, "Connect serial id %u to TSA failed (%d)\n",
+			tsa_serial->id, ret);
+		return ret;
+	}
+	return 0;
+}
+
 int tsa_serial_connect(struct tsa_serial *tsa_serial)
 {
-	return tsa_cpm1_serial_connect(tsa_serial, true);
+	struct tsa *tsa = tsa_serial_get_tsa(tsa_serial);
+
+	return tsa_is_qe(tsa) ?
+		tsa_qe_serial_connect(tsa_serial, true) :
+		tsa_cpm1_serial_connect(tsa_serial, true);
 }
 EXPORT_SYMBOL(tsa_serial_connect);
 
 int tsa_serial_disconnect(struct tsa_serial *tsa_serial)
 {
-	return tsa_cpm1_serial_connect(tsa_serial, false);
+	struct tsa *tsa = tsa_serial_get_tsa(tsa_serial);
+
+	return tsa_is_qe(tsa) ?
+		tsa_qe_serial_connect(tsa_serial, false) :
+		tsa_cpm1_serial_connect(tsa_serial, false);
 }
 EXPORT_SYMBOL(tsa_serial_disconnect);
 
@@ -268,10 +382,39 @@ static void tsa_cpm1_init_entries_area(struct tsa *tsa, struct tsa_entries_area
 	}
 }
 
+static void tsa_qe_init_entries_area(struct tsa *tsa, struct tsa_entries_area *area,
+				     u32 tdms, u32 tdm_id, bool is_rx)
+{
+	resource_size_t eighth;
+	resource_size_t half;
+
+	eighth = tsa->si_ram_sz / 8;
+	half = tsa->si_ram_sz / 2;
+
+	/*
+	 * One half of the SI RAM used for Tx, the other one for Rx.
+	 * In each half, 1/4 of the area is assigned to each TDM.
+	 */
+	if (is_rx) {
+		/* Rx: Second half of si_ram */
+		area->entries_start = tsa->si_ram + half + (eighth * tdm_id);
+		area->entries_next = area->entries_start + eighth;
+		area->last_entry = NULL;
+	} else {
+		/* Tx: First half of si_ram */
+		area->entries_start = tsa->si_ram + (eighth * tdm_id);
+		area->entries_next = area->entries_start + eighth;
+		area->last_entry = NULL;
+	}
+}
+
 static void tsa_init_entries_area(struct tsa *tsa, struct tsa_entries_area *area,
 				  u32 tdms, u32 tdm_id, bool is_rx)
 {
-	tsa_cpm1_init_entries_area(tsa, area, tdms, tdm_id, is_rx);
+	if (tsa_is_qe(tsa))
+		tsa_qe_init_entries_area(tsa, area, tdms, tdm_id, is_rx);
+	else
+		tsa_cpm1_init_entries_area(tsa, area, tdms, tdm_id, is_rx);
 }
 
 static const char *tsa_cpm1_serial_id2name(struct tsa *tsa, u32 serial_id)
@@ -289,9 +432,26 @@ static const char *tsa_cpm1_serial_id2name(struct tsa *tsa, u32 serial_id)
 	return NULL;
 }
 
+static const char *tsa_qe_serial_id2name(struct tsa *tsa, u32 serial_id)
+{
+	switch (serial_id) {
+	case FSL_QE_TSA_NU:	return "Not used";
+	case FSL_QE_TSA_UCC1:	return "UCC1";
+	case FSL_QE_TSA_UCC2:	return "UCC2";
+	case FSL_QE_TSA_UCC3:	return "UCC3";
+	case FSL_QE_TSA_UCC4:	return "UCC4";
+	case FSL_QE_TSA_UCC5:	return "UCC5";
+	default:
+		break;
+	}
+	return NULL;
+}
+
 static const char *tsa_serial_id2name(struct tsa *tsa, u32 serial_id)
 {
-	return tsa_cpm1_serial_id2name(tsa, serial_id);
+	return tsa_is_qe(tsa) ?
+		tsa_qe_serial_id2name(tsa, serial_id) :
+		tsa_cpm1_serial_id2name(tsa, serial_id);
 }
 
 static u32 tsa_cpm1_serial_id2csel(struct tsa *tsa, u32 serial_id)
@@ -351,10 +511,69 @@ static int tsa_cpm1_add_entry(struct tsa *tsa, struct tsa_entries_area *area,
 	return 0;
 }
 
+static u32 tsa_qe_serial_id2csel(struct tsa *tsa, u32 serial_id)
+{
+	switch (serial_id) {
+	case FSL_QE_TSA_UCC1:	return TSA_QE_SIRAM_ENTRY_CSEL_UCC1;
+	case FSL_QE_TSA_UCC2:	return TSA_QE_SIRAM_ENTRY_CSEL_UCC2;
+	case FSL_QE_TSA_UCC3:	return TSA_QE_SIRAM_ENTRY_CSEL_UCC3;
+	case FSL_QE_TSA_UCC4:	return TSA_QE_SIRAM_ENTRY_CSEL_UCC4;
+	case FSL_QE_TSA_UCC5:	return TSA_QE_SIRAM_ENTRY_CSEL_UCC5;
+	default:
+		break;
+	}
+	return TSA_QE_SIRAM_ENTRY_CSEL_NU;
+}
+
+static int tsa_qe_add_entry(struct tsa *tsa, struct tsa_entries_area *area,
+			    u32 count, u32 serial_id)
+{
+	void __iomem *addr;
+	u32 left;
+	u32 val;
+	u32 cnt;
+	u32 nb;
+
+	addr = area->last_entry ? area->last_entry + 2 : area->entries_start;
+
+	nb = DIV_ROUND_UP(count, 8);
+	if ((addr + (nb * 2)) > area->entries_next) {
+		dev_err(tsa->dev, "si ram area full\n");
+		return -ENOSPC;
+	}
+
+	if (area->last_entry) {
+		/* Clear last flag */
+		tsa_clrbits16(area->last_entry, TSA_QE_SIRAM_ENTRY_LAST);
+	}
+
+	left = count;
+	while (left) {
+		val = TSA_QE_SIRAM_ENTRY_BYTE | tsa_qe_serial_id2csel(tsa, serial_id);
+
+		if (left > 8) {
+			cnt = 8;
+		} else {
+			cnt = left;
+			val |= TSA_QE_SIRAM_ENTRY_LAST;
+			area->last_entry = addr;
+		}
+		val |= TSA_QE_SIRAM_ENTRY_CNT(cnt - 1);
+
+		tsa_write16(addr, val);
+		addr += 2;
+		left -= cnt;
+	}
+
+	return 0;
+}
+
 static int tsa_add_entry(struct tsa *tsa, struct tsa_entries_area *area,
 			 u32 count, u32 serial_id)
 {
-	return tsa_cpm1_add_entry(tsa, area, count, serial_id);
+	return tsa_is_qe(tsa) ?
+		tsa_qe_add_entry(tsa, area, count, serial_id) :
+		tsa_cpm1_add_entry(tsa, area, count, serial_id);
 }
 
 static int tsa_of_parse_tdm_route(struct tsa *tsa, struct device_node *tdm_np,
@@ -470,7 +689,18 @@ static int tsa_of_parse_tdms(struct tsa *tsa, struct device_node *np)
 		case 1:
 			tsa->tdms |= BIT(TSA_TDMB);
 			break;
+		case 2:
+			if (!tsa_is_qe(tsa))
+				goto invalid_tdm; /* Not available on CPM1 */
+			tsa->tdms |= BIT(TSA_TDMC);
+			break;
+		case 3:
+			if (!tsa_is_qe(tsa))
+				goto invalid_tdm;  /* Not available on CPM1 */
+			tsa->tdms |= BIT(TSA_TDMD);
+			break;
 		default:
+invalid_tdm:
 			dev_err(tsa->dev, "%pOF: Invalid tdm_id (%u)\n", tdm_np,
 				tdm_id);
 			of_node_put(tdm_np);
@@ -536,10 +766,14 @@ static int tsa_of_parse_tdms(struct tsa *tsa, struct device_node *np)
 		if (of_property_read_bool(tdm_np, "fsl,fsync-rising-edge"))
 			tdm->simode_tdm |= TSA_SIMODE_TDM_FE;
 
+		if (tsa_is_qe(tsa) &&
+		    of_property_read_bool(tdm_np, "fsl,fsync-active-low"))
+			tdm->simode_tdm |= TSA_QE_SIMODE_TDM_SL;
+
 		if (of_property_read_bool(tdm_np, "fsl,double-speed-clock"))
 			tdm->simode_tdm |= TSA_SIMODE_TDM_DSC;
 
-		clk = of_clk_get_by_name(tdm_np, "l1rsync");
+		clk = of_clk_get_by_name(tdm_np, tsa_is_qe(tsa) ? "rsync" : "l1rsync");
 		if (IS_ERR(clk)) {
 			ret = PTR_ERR(clk);
 			of_node_put(tdm_np);
@@ -553,7 +787,7 @@ static int tsa_of_parse_tdms(struct tsa *tsa, struct device_node *np)
 		}
 		tdm->l1rsync_clk = clk;
 
-		clk = of_clk_get_by_name(tdm_np, "l1rclk");
+		clk = of_clk_get_by_name(tdm_np, tsa_is_qe(tsa) ? "rclk" : "l1rclk");
 		if (IS_ERR(clk)) {
 			ret = PTR_ERR(clk);
 			of_node_put(tdm_np);
@@ -568,7 +802,7 @@ static int tsa_of_parse_tdms(struct tsa *tsa, struct device_node *np)
 		tdm->l1rclk_clk = clk;
 
 		if (!(tdm->simode_tdm & TSA_SIMODE_TDM_CRT)) {
-			clk = of_clk_get_by_name(tdm_np, "l1tsync");
+			clk = of_clk_get_by_name(tdm_np, tsa_is_qe(tsa) ? "tsync" : "l1tsync");
 			if (IS_ERR(clk)) {
 				ret = PTR_ERR(clk);
 				of_node_put(tdm_np);
@@ -582,7 +816,7 @@ static int tsa_of_parse_tdms(struct tsa *tsa, struct device_node *np)
 			}
 			tdm->l1tsync_clk = clk;
 
-			clk = of_clk_get_by_name(tdm_np, "l1tclk");
+			clk = of_clk_get_by_name(tdm_np, tsa_is_qe(tsa) ? "tclk" : "l1tclk");
 			if (IS_ERR(clk)) {
 				ret = PTR_ERR(clk);
 				of_node_put(tdm_np);
@@ -597,6 +831,17 @@ static int tsa_of_parse_tdms(struct tsa *tsa, struct device_node *np)
 			tdm->l1tclk_clk = clk;
 		}
 
+		if (tsa_is_qe(tsa)) {
+			/*
+			 * The starting address for TSA table must be set.
+			 * 512 entries for Tx and 512 entries for Rx are
+			 * available for 4 TDMs.
+			 * We assign entries equally -> 128 Rx/Tx entries per
+			 * TDM. In other words, 4 blocks of 32 entries per TDM.
+			 */
+			tdm->simode_tdm |= TSA_QE_SIMODE_TDM_SAD(4 * tdm_id);
+		}
+
 		ret = tsa_of_parse_tdm_rx_route(tsa, tdm_np, tsa->tdms, tdm_id);
 		if (ret) {
 			of_node_put(tdm_np);
@@ -640,8 +885,13 @@ static void tsa_init_si_ram(struct tsa *tsa)
 	resource_size_t i;
 
 	/* Fill all entries as the last one */
-	for (i = 0; i < tsa->si_ram_sz; i += 4)
-		tsa_write32(tsa->si_ram + i, TSA_CPM1_SIRAM_ENTRY_LAST);
+	if (tsa_is_qe(tsa)) {
+		for (i = 0; i < tsa->si_ram_sz; i += 2)
+			tsa_write16(tsa->si_ram + i, TSA_QE_SIRAM_ENTRY_LAST);
+	} else {
+		for (i = 0; i < tsa->si_ram_sz; i += 4)
+			tsa_write32(tsa->si_ram + i, TSA_CPM1_SIRAM_ENTRY_LAST);
+	}
 }
 
 static int tsa_cpm1_setup(struct tsa *tsa)
@@ -672,9 +922,50 @@ static int tsa_cpm1_setup(struct tsa *tsa)
 	return 0;
 }
 
+static int tsa_qe_setup(struct tsa *tsa)
+{
+	unsigned int sixmr;
+	u8 siglmrh = 0;
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(tsa->tdm); i++) {
+		if (!tsa->tdm[i].is_enable)
+			continue;
+
+		switch (i) {
+		case 0:
+			sixmr = TSA_QE_SIAMR;
+			siglmrh |= TSA_QE_SIGLMRH_ENA;
+			break;
+		case 1:
+			sixmr = TSA_QE_SIBMR;
+			siglmrh |= TSA_QE_SIGLMRH_ENB;
+			break;
+		case 2:
+			sixmr = TSA_QE_SICMR;
+			siglmrh |= TSA_QE_SIGLMRH_ENC;
+			break;
+		case 3:
+			sixmr = TSA_QE_SIDMR;
+			siglmrh |= TSA_QE_SIGLMRH_END;
+			break;
+		default:
+			return -EINVAL;
+		}
+
+		/* Set SI mode register */
+		tsa_write16(tsa->si_regs + sixmr, tsa->tdm[i].simode_tdm);
+	}
+
+	/* Enable TDMs */
+	tsa_write8(tsa->si_regs + TSA_QE_SIGLMRH, siglmrh);
+
+	return 0;
+}
+
 static int tsa_setup(struct tsa *tsa)
 {
-	return tsa_cpm1_setup(tsa);
+	return tsa_is_qe(tsa) ? tsa_qe_setup(tsa) : tsa_cpm1_setup(tsa);
 }
 
 static int tsa_probe(struct platform_device *pdev)
@@ -695,6 +986,9 @@ static int tsa_probe(struct platform_device *pdev)
 	case TSA_CPM1:
 		dev_info(tsa->dev, "CPM1 version\n");
 		break;
+	case TSA_QE:
+		dev_info(tsa->dev, "QE version\n");
+		break;
 	default:
 		dev_err(tsa->dev, "Unknown version (%d)\n", tsa->version);
 		return -EINVAL;
@@ -760,7 +1054,12 @@ static void tsa_remove(struct platform_device *pdev)
 }
 
 static const struct of_device_id tsa_id_table[] = {
+#if IS_ENABLED(CONFIG_CPM1)
 	{ .compatible = "fsl,cpm1-tsa", .data = (void *)TSA_CPM1 },
+#endif
+#if IS_ENABLED(CONFIG_QUICC_ENGINE)
+	{ .compatible = "fsl,qe-tsa", .data = (void *)TSA_QE },
+#endif
 	{} /* sentinel */
 };
 MODULE_DEVICE_TABLE(of, tsa_id_table);
@@ -869,5 +1168,5 @@ struct tsa_serial *devm_tsa_serial_get_byphandle(struct device *dev,
 EXPORT_SYMBOL(devm_tsa_serial_get_byphandle);
 
 MODULE_AUTHOR("Herve Codina <herve.codina@bootlin.com>");
-MODULE_DESCRIPTION("CPM TSA driver");
+MODULE_DESCRIPTION("CPM/QE TSA driver");
 MODULE_LICENSE("GPL");
-- 
2.45.0