can: ems_pci: Add read/write register and post irq functions

Add functions to read and write SJA1000 registers and also the
post irq routine

Signed-off-by: Gerhard Uttenthaler <uttenthaler@ems-wuensche.com>
Link: https://lore.kernel.org/all/20230120112616.6071-5-uttenthaler@ems-wuensche.com
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

diff --git a/drivers/net/can/sja1000/ems_pci.c b/drivers/net/can/sja1000/ems_pci.c
index 5748c24dd13715c1faf1966b20da676192f98d10..0d6289fda4472738bbaa8e482f8b95eb3b55d529 100644 (file)
--- a/drivers/net/can/sja1000/ems_pci.c
+++ b/drivers/net/can/sja1000/ems_pci.c
@@ -172,6 +172,24 @@ static void ems_pci_v2_post_irq(const struct sja1000_priv *priv)
        writel(PLX_ICSR_ENA_CLR, card->conf_addr + PLX_ICSR);
 }
 
+static u8 ems_pci_v3_read_reg(const struct sja1000_priv *priv, int port)
+{
+       return readb(priv->reg_base + port);
+}
+
+static void ems_pci_v3_write_reg(const struct sja1000_priv *priv,
+                                int port, u8 val)
+{
+       writeb(val, priv->reg_base + port);
+}
+
+static void ems_pci_v3_post_irq(const struct sja1000_priv *priv)
+{
+       struct ems_pci_card *card = (struct ems_pci_card *)priv->priv;
+
+       writel(ASIX_LINTSR_INT0AC, card->conf_addr + ASIX_LINTSR);
+}
+
 /* Check if a CAN controller is present at the specified location
  * by trying to set 'em into the PeliCAN mode
  */
@@ -330,10 +348,14 @@ static int ems_pci_add_card(struct pci_dev *pdev,
                        priv->read_reg  = ems_pci_v1_read_reg;
                        priv->write_reg = ems_pci_v1_write_reg;
                        priv->post_irq  = ems_pci_v1_post_irq;
-               } else {
+               } else if (card->version == 2) {
                        priv->read_reg  = ems_pci_v2_read_reg;
                        priv->write_reg = ems_pci_v2_write_reg;
                        priv->post_irq  = ems_pci_v2_post_irq;
+               } else {
+                       priv->read_reg  = ems_pci_v3_read_reg;
+                       priv->write_reg = ems_pci_v3_write_reg;
+                       priv->post_irq  = ems_pci_v3_post_irq;
                }
 
                /* Check if channel is present */