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Subject[PATCH] can: sja1000: plx_pci: add support for ASEM CAN raw device
Date
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>
---
drivers/net/can/sja1000/Kconfig | 1 +
drivers/net/can/sja1000/plx_pci.c | 68 ++++++++++++++++++++++++++++++++++++++-
2 files changed, 68 insertions(+), 1 deletion(-)

diff --git a/drivers/net/can/sja1000/Kconfig b/drivers/net/can/sja1000/Kconfig
index 1e65cb6..f6dc899 100644
--- 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..864fe8d 100644
--- 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 1 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_DUAL_CAN_VENDOR_ID 0x10b5
+#define ASEM_DUAL_CAN_DEVICE_ID 0x9030
+#define ASEM_DUAL_CAN_SUB_VENDOR_ID 0x3000
+#define ASEM_DUAL_CAN_SUB_DEVICE_ID 0x1001
+#define ASEM_DUAL_CAN_SUB_DEVICE_ID_BIS 0x1002
+#define ASEM_DUAL_CAN_RESET_REGISTER 0x54
+#define ASEM_DUAL_CAN_RESET_MASK_CAN1 0x20
+#define ASEM_DUAL_CAN_RESET_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_DUAL_CAN_VENDOR_ID, ASEM_DUAL_CAN_DEVICE_ID,
+ ASEM_DUAL_CAN_SUB_VENDOR_ID, ASEM_DUAL_CAN_SUB_DEVICE_ID,
+ 0, 0,
+ (kernel_ulong_t)&plx_pci_card_info_asem_dual_can
+ },
+ {
+ /* ASEM Dual CAN raw -new model */
+ ASEM_DUAL_CAN_VENDOR_ID, ASEM_DUAL_CAN_DEVICE_ID,
+ ASEM_DUAL_CAN_SUB_VENDOR_ID, ASEM_DUAL_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 +562,34 @@ 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;
+ static const int reset_bar;
+ u8 tmpval;
+
+ plx_pci_reset_common(pdev);
+
+ bar0_addr = pci_iomap(pdev, reset_bar, 0);
+ if (!bar0_addr) {
+ dev_err(&pdev->dev, "Failed to remap reset "
+ "space %d (BAR%d)\n", 0, reset_bar);
+ } else {
+ /* reset the two SJA1000 chips */
+ tmpval = ioread8(bar0_addr + ASEM_DUAL_CAN_RESET_REGISTER);
+ tmpval &= ~(ASEM_DUAL_CAN_RESET_MASK_CAN1 |
+ ASEM_DUAL_CAN_RESET_MASK_CAN2);
+ iowrite8(tmpval, bar0_addr + ASEM_DUAL_CAN_RESET_REGISTER);
+ usleep_range(300, 400);
+ tmpval |= ASEM_DUAL_CAN_RESET_MASK_CAN1 |
+ ASEM_DUAL_CAN_RESET_MASK_CAN2;
+ iowrite8(tmpval, bar0_addr + ASEM_DUAL_CAN_RESET_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);
--
2.7.4
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