can: sja1000: plx_pci: add support for ASEM CAN raw device

This patch adds support for ASEM opto-isolated dual channels
CAN raw device (http://www.asem.it)

Signed-off-by: Flavio Suligoi <f.suligoi@asem.it>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

diff --git a/drivers/net/can/sja1000/Kconfig b/drivers/net/can/sja1000/Kconfig
index 1e65cb6..f6dc899 100644 (file)
--- a/drivers/net/can/sja1000/Kconfig
+++ b/drivers/net/can/sja1000/Kconfig
@@ -88,6 +88,7 @@ config CAN_PLX_PCI
           - TEWS TECHNOLOGIES TPMC810 card (http://www.tews.com/)
           - IXXAT Automation PC-I 04/PCI card (http://www.ixxat.com/)
           - Connect Tech Inc. CANpro/104-Plus Opto (CRG001) card (http://www.connecttech.com)
+          - ASEM CAN raw - 2 isolated CAN channels (www.asem.it)
 
 config CAN_TSCAN1
        tristate "TS-CAN1 PC104 boards"

diff --git a/drivers/net/can/sja1000/plx_pci.c b/drivers/net/can/sja1000/plx_pci.c
index f8ff25c..9bcdefe 100644 (file)
--- a/drivers/net/can/sja1000/plx_pci.c
+++ b/drivers/net/can/sja1000/plx_pci.c
@@ -46,7 +46,8 @@ MODULE_SUPPORTED_DEVICE("Adlink PCI-7841/cPCI-7841, "
                        "esd CAN-PCIe/2000, "
                        "Connect Tech Inc. CANpro/104-Plus Opto (CRG001), "
                        "IXXAT PC-I 04/PCI, "
-                       "ELCUS CAN-200-PCI")
+                       "ELCUS CAN-200-PCI, "
+                       "ASEM DUAL CAN-RAW")
 MODULE_LICENSE("GPL v2");
 
 #define PLX_PCI_MAX_CHAN 2
@@ -70,7 +71,9 @@ struct plx_pci_card {
                                         */
 
 #define PLX_LINT1_EN   0x1             /* Local interrupt 1 enable */
+#define PLX_LINT1_POL  (1 << 1)        /* Local interrupt 1 polarity */
 #define PLX_LINT2_EN   (1 << 3)        /* Local interrupt 2 enable */
+#define PLX_LINT2_POL  (1 << 4)        /* Local interrupt 2 polarity */
 #define PLX_PCI_INT_EN (1 << 6)        /* PCI Interrupt Enable */
 #define PLX_PCI_RESET  (1 << 30)       /* PCI Adapter Software Reset */
 
@@ -92,6 +95,9 @@ struct plx_pci_card {
  */
 #define PLX_PCI_OCR    (OCR_TX0_PUSHPULL | OCR_TX1_PUSHPULL)
 
+/* OCR setting for ASEM Dual CAN raw */
+#define ASEM_PCI_OCR   0xfe
+
 /*
  * In the CDR register, you should set CBP to 1.
  * You will probably also want to set the clock divider value to 7
@@ -145,10 +151,20 @@ struct plx_pci_card {
 #define MOXA_PCI_VENDOR_ID             0x1393
 #define MOXA_PCI_DEVICE_ID             0x0100
 
+#define ASEM_RAW_CAN_VENDOR_ID         0x10b5
+#define ASEM_RAW_CAN_DEVICE_ID         0x9030
+#define ASEM_RAW_CAN_SUB_VENDOR_ID     0x3000
+#define ASEM_RAW_CAN_SUB_DEVICE_ID     0x1001
+#define ASEM_RAW_CAN_SUB_DEVICE_ID_BIS 0x1002
+#define ASEM_RAW_CAN_RST_REGISTER      0x54
+#define ASEM_RAW_CAN_RST_MASK_CAN1     0x20
+#define ASEM_RAW_CAN_RST_MASK_CAN2     0x04
+
 static void plx_pci_reset_common(struct pci_dev *pdev);
 static void plx9056_pci_reset_common(struct pci_dev *pdev);
 static void plx_pci_reset_marathon_pci(struct pci_dev *pdev);
 static void plx_pci_reset_marathon_pcie(struct pci_dev *pdev);
+static void plx_pci_reset_asem_dual_can_raw(struct pci_dev *pdev);
 
 struct plx_pci_channel_map {
        u32 bar;
@@ -269,6 +285,14 @@ static struct plx_pci_card_info plx_pci_card_info_moxa = {
         /* based on PLX9052 */
 };
 
+static struct plx_pci_card_info plx_pci_card_info_asem_dual_can = {
+       "ASEM Dual CAN raw PCI", 2,
+       PLX_PCI_CAN_CLOCK, ASEM_PCI_OCR, PLX_PCI_CDR,
+       {0, 0x00, 0x00}, { {2, 0x00, 0x00}, {4, 0x00, 0x00} },
+       &plx_pci_reset_asem_dual_can_raw
+       /* based on PLX9030 */
+};
+
 static const struct pci_device_id plx_pci_tbl[] = {
        {
                /* Adlink PCI-7841/cPCI-7841 */
@@ -375,6 +399,20 @@ static const struct pci_device_id plx_pci_tbl[] = {
                0, 0,
                (kernel_ulong_t)&plx_pci_card_info_moxa
        },
+       {
+               /* ASEM Dual CAN raw */
+               ASEM_RAW_CAN_VENDOR_ID, ASEM_RAW_CAN_DEVICE_ID,
+               ASEM_RAW_CAN_SUB_VENDOR_ID, ASEM_RAW_CAN_SUB_DEVICE_ID,
+               0, 0,
+               (kernel_ulong_t)&plx_pci_card_info_asem_dual_can
+       },
+       {
+               /* ASEM Dual CAN raw -new model */
+               ASEM_RAW_CAN_VENDOR_ID, ASEM_RAW_CAN_DEVICE_ID,
+               ASEM_RAW_CAN_SUB_VENDOR_ID, ASEM_RAW_CAN_SUB_DEVICE_ID_BIS,
+               0, 0,
+               (kernel_ulong_t)&plx_pci_card_info_asem_dual_can
+       },
        { 0,}
 };
 MODULE_DEVICE_TABLE(pci, plx_pci_tbl);
@@ -524,6 +562,31 @@ static void plx_pci_reset_marathon_pcie(struct pci_dev *pdev)
        }
 }
 
+/* Special reset function for ASEM Dual CAN raw card */
+static void plx_pci_reset_asem_dual_can_raw(struct pci_dev *pdev)
+{
+       void __iomem *bar0_addr;
+       u8 tmpval;
+
+       plx_pci_reset_common(pdev);
+
+       bar0_addr = pci_iomap(pdev, 0, 0);
+       if (!bar0_addr) {
+               dev_err(&pdev->dev, "Failed to remap reset space 0 (BAR0)\n");
+               return;
+       }
+
+       /* reset the two SJA1000 chips */
+       tmpval = ioread8(bar0_addr + ASEM_RAW_CAN_RST_REGISTER);
+       tmpval &= ~(ASEM_RAW_CAN_RST_MASK_CAN1 | ASEM_RAW_CAN_RST_MASK_CAN2);
+       iowrite8(tmpval, bar0_addr + ASEM_RAW_CAN_RST_REGISTER);
+       usleep_range(300, 400);
+       tmpval |= ASEM_RAW_CAN_RST_MASK_CAN1 | ASEM_RAW_CAN_RST_MASK_CAN2;
+       iowrite8(tmpval, bar0_addr + ASEM_RAW_CAN_RST_REGISTER);
+       usleep_range(300, 400);
+       pci_iounmap(pdev, bar0_addr);
+}
+
 static void plx_pci_del_card(struct pci_dev *pdev)
 {
        struct plx_pci_card *card = pci_get_drvdata(pdev);