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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>
This commit is contained in:
Flavio Suligoi 2018-08-07 09:17:19 +02:00 committed by Marc Kleine-Budde
parent 0db9071353
commit 06a3f31ae2
2 changed files with 65 additions and 1 deletions
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1
drivers/net/can/sja1000/Kconfig
View File

@ -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"

65
drivers/net/can/sja1000/plx_pci.c
View File

@ -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);