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can: xilinx: add can 2.0 support

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Add support for can 2.0.

Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
Shubhrajyoti Datta 2018-10-12 09:55:08 +05:30 committed by Marc Kleine-Budde
parent c5435adc3d
commit 0db9071353
1 changed files with 33 additions and 1 deletions
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34
drivers/net/can/xilinx_can.c
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@ -63,6 +63,7 @@ enum xcan_reg {
XCAN_FSR_OFFSET = 0x00E8, /* RX FIFO Status */
XCAN_TXMSG_BASE_OFFSET = 0x0100, /* TX Message Space */
XCAN_RXMSG_BASE_OFFSET = 0x1100, /* RX Message Space */
XCAN_RXMSG_2_BASE_OFFSET = 0x2100, /* RX Message Space */
};
#define XCAN_FRAME_ID_OFFSET(frame_base) ((frame_base) + 0x00)
@ -75,6 +76,8 @@ enum xcan_reg {
XCAN_CANFD_FRAME_SIZE * (n))
#define XCAN_RXMSG_FRAME_OFFSET(n) (XCAN_RXMSG_BASE_OFFSET + \
XCAN_CANFD_FRAME_SIZE * (n))
#define XCAN_RXMSG_2_FRAME_OFFSET(n) (XCAN_RXMSG_2_BASE_OFFSET + \
XCAN_CANFD_FRAME_SIZE * (n))
/* the single TX mailbox used by this driver on CAN FD HW */
#define XCAN_TX_MAILBOX_IDX 0
@ -152,6 +155,7 @@ enum xcan_reg {
* instead of the regular FIFO at 0x50
*/
#define XCAN_FLAG_RX_FIFO_MULTI 0x0010
#define XCAN_FLAG_CANFD_2 0x0020
struct xcan_devtype_data {
unsigned int flags;
@ -221,6 +225,18 @@ static const struct can_bittiming_const xcan_bittiming_const_canfd = {
.brp_inc = 1,
};
static const struct can_bittiming_const xcan_bittiming_const_canfd2 = {
.name = DRIVER_NAME,
.tseg1_min = 1,
.tseg1_max = 256,
.tseg2_min = 1,
.tseg2_max = 128,
.sjw_max = 128,
.brp_min = 1,
.brp_max = 256,
.brp_inc = 1,
};
/**
* xcan_write_reg_le - Write a value to the device register little endian
* @priv: Driver private data structure
@ -973,7 +989,10 @@ static int xcan_rx_fifo_get_next_frame(struct xcan_priv *priv)
if (!(fsr & XCAN_FSR_FL_MASK))
return -ENOENT;
offset = XCAN_RXMSG_FRAME_OFFSET(fsr & XCAN_FSR_RI_MASK);
if (priv->devtype.flags & XCAN_FLAG_CANFD_2)
offset = XCAN_RXMSG_2_FRAME_OFFSET(fsr & XCAN_FSR_RI_MASK);
else
offset = XCAN_RXMSG_FRAME_OFFSET(fsr & XCAN_FSR_RI_MASK);
} else {
/* check if RX FIFO is empty */
@ -1430,11 +1449,24 @@ static const struct xcan_devtype_data xcan_canfd_data = {
.bus_clk_name = "s_axi_aclk",
};
static const struct xcan_devtype_data xcan_canfd2_data = {
.flags = XCAN_FLAG_EXT_FILTERS |
XCAN_FLAG_RXMNF |
XCAN_FLAG_TX_MAILBOXES |
XCAN_FLAG_CANFD_2 |
XCAN_FLAG_RX_FIFO_MULTI,
.bittiming_const = &xcan_bittiming_const_canfd2,
.btr_ts2_shift = XCAN_BTR_TS2_SHIFT_CANFD,
.btr_sjw_shift = XCAN_BTR_SJW_SHIFT_CANFD,
.bus_clk_name = "s_axi_aclk",
};
/* Match table for OF platform binding */
static const struct of_device_id xcan_of_match[] = {
{ .compatible = "xlnx,zynq-can-1.0", .data = &xcan_zynq_data },
{ .compatible = "xlnx,axi-can-1.00.a", .data = &xcan_axi_data },
{ .compatible = "xlnx,canfd-1.0", .data = &xcan_canfd_data },
{ .compatible = "xlnx,canfd-2.0", .data = &xcan_canfd2_data },
{ /* end of list */ },
};
MODULE_DEVICE_TABLE(of, xcan_of_match);