diff mbox series

[net,8/9] can: bxcan: add support for single peripheral configuration

Message ID 20230515204722.1000957-9-mkl@pengutronix.de (mailing list archive)
State Accepted
Commit 85a79b971164c4636b2db7f4aef9788142e3f885
Delegated to: Netdev Maintainers
Headers show
Series [net,1/9] can: isotp: recvmsg(): allow MSG_CMSG_COMPAT flag | expand

Checks

Context Check Description
netdev/series_format success Pull request is its own cover letter
netdev/tree_selection success Clearly marked for net
netdev/fixes_present success Fixes tag present in non-next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 8 this patch: 8
netdev/cc_maintainers warning 3 maintainers not CCed: pabeni@redhat.com wg@grandegger.com edumazet@google.com
netdev/build_clang success Errors and warnings before: 8 this patch: 8
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 8 this patch: 8
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 95 lines checked
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Marc Kleine-Budde May 15, 2023, 8:47 p.m. UTC 
From: Dario Binacchi <dario.binacchi@amarulasolutions.com>

Add support for bxCAN controller in single peripheral configuration:
- primary bxCAN
- dedicated Memory Access Controller unit
- 512-byte SRAM memory
- 14 filter banks

Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Link: https://lore.kernel.org/all/20230427204540.3126234-5-dario.binacchi@amarulasolutions.com
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
---
 drivers/net/can/bxcan.c | 34 +++++++++++++++++++++++-----------
 1 file changed, 23 insertions(+), 11 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/can/bxcan.c b/drivers/net/can/bxcan.c
index e26ccd41e3cb..027a8a162fe4 100644
--- a/drivers/net/can/bxcan.c
+++ b/drivers/net/can/bxcan.c
@@ -118,7 +118,7 @@ 
 #define BXCAN_FiR1_REG(b) (0x40 + (b) * 8)
 #define BXCAN_FiR2_REG(b) (0x44 + (b) * 8)
 
-#define BXCAN_FILTER_ID(primary) (primary ? 0 : 14)
+#define BXCAN_FILTER_ID(cfg) ((cfg) == BXCAN_CFG_DUAL_SECONDARY ? 14 : 0)
 
 /* Filter primary register (FMR) bits */
 #define BXCAN_FMR_CANSB_MASK GENMASK(13, 8)
@@ -135,6 +135,12 @@  enum bxcan_lec_code {
 	BXCAN_LEC_UNUSED
 };
 
+enum bxcan_cfg {
+	BXCAN_CFG_SINGLE = 0,
+	BXCAN_CFG_DUAL_PRIMARY,
+	BXCAN_CFG_DUAL_SECONDARY
+};
+
 /* Structure of the message buffer */
 struct bxcan_mb {
 	u32 id;			/* can identifier */
@@ -167,7 +173,7 @@  struct bxcan_priv {
 	struct regmap *gcan;
 	int tx_irq;
 	int sce_irq;
-	bool primary;
+	enum bxcan_cfg cfg;
 	struct clk *clk;
 	spinlock_t rmw_lock;	/* lock for read-modify-write operations */
 	unsigned int tx_head;
@@ -202,17 +208,17 @@  static inline void bxcan_rmw(struct bxcan_priv *priv, void __iomem *addr,
 	spin_unlock_irqrestore(&priv->rmw_lock, flags);
 }
 
-static void bxcan_disable_filters(struct bxcan_priv *priv, bool primary)
+static void bxcan_disable_filters(struct bxcan_priv *priv, enum bxcan_cfg cfg)
 {
-	unsigned int fid = BXCAN_FILTER_ID(primary);
+	unsigned int fid = BXCAN_FILTER_ID(cfg);
 	u32 fmask = BIT(fid);
 
 	regmap_update_bits(priv->gcan, BXCAN_FA1R_REG, fmask, 0);
 }
 
-static void bxcan_enable_filters(struct bxcan_priv *priv, bool primary)
+static void bxcan_enable_filters(struct bxcan_priv *priv, enum bxcan_cfg cfg)
 {
-	unsigned int fid = BXCAN_FILTER_ID(primary);
+	unsigned int fid = BXCAN_FILTER_ID(cfg);
 	u32 fmask = BIT(fid);
 
 	/* Filter settings:
@@ -680,7 +686,7 @@  static int bxcan_chip_start(struct net_device *ndev)
 		  BXCAN_BTR_BRP_MASK | BXCAN_BTR_TS1_MASK | BXCAN_BTR_TS2_MASK |
 		  BXCAN_BTR_SJW_MASK, set);
 
-	bxcan_enable_filters(priv, priv->primary);
+	bxcan_enable_filters(priv, priv->cfg);
 
 	/* Clear all internal status */
 	priv->tx_head = 0;
@@ -806,7 +812,7 @@  static void bxcan_chip_stop(struct net_device *ndev)
 		  BXCAN_IER_EPVIE | BXCAN_IER_EWGIE | BXCAN_IER_FOVIE1 |
 		  BXCAN_IER_FFIE1 | BXCAN_IER_FMPIE1 | BXCAN_IER_FOVIE0 |
 		  BXCAN_IER_FFIE0 | BXCAN_IER_FMPIE0 | BXCAN_IER_TMEIE, 0);
-	bxcan_disable_filters(priv, priv->primary);
+	bxcan_disable_filters(priv, priv->cfg);
 	bxcan_enter_sleep_mode(priv);
 	priv->can.state = CAN_STATE_STOPPED;
 }
@@ -931,7 +937,7 @@  static int bxcan_probe(struct platform_device *pdev)
 	struct clk *clk = NULL;
 	void __iomem *regs;
 	struct regmap *gcan;
-	bool primary;
+	enum bxcan_cfg cfg;
 	int err, rx_irq, tx_irq, sce_irq;
 
 	regs = devm_platform_ioremap_resource(pdev, 0);
@@ -946,7 +952,13 @@  static int bxcan_probe(struct platform_device *pdev)
 		return PTR_ERR(gcan);
 	}
 
-	primary = of_property_read_bool(np, "st,can-primary");
+	if (of_property_read_bool(np, "st,can-primary"))
+		cfg = BXCAN_CFG_DUAL_PRIMARY;
+	else if (of_property_read_bool(np, "st,can-secondary"))
+		cfg = BXCAN_CFG_DUAL_SECONDARY;
+	else
+		cfg = BXCAN_CFG_SINGLE;
+
 	clk = devm_clk_get(dev, NULL);
 	if (IS_ERR(clk)) {
 		dev_err(dev, "failed to get clock\n");
@@ -992,7 +1004,7 @@  static int bxcan_probe(struct platform_device *pdev)
 	priv->clk = clk;
 	priv->tx_irq = tx_irq;
 	priv->sce_irq = sce_irq;
-	priv->primary = primary;
+	priv->cfg = cfg;
 	priv->can.clock.freq = clk_get_rate(clk);
 	spin_lock_init(&priv->rmw_lock);
 	priv->tx_head = 0;