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authorHui Wang <jason77.wang@gmail.com>2012-06-28 12:21:35 +0400
committerMarc Kleine-Budde <mkl@pengutronix.de>2012-07-03 11:33:00 +0400
commit30c1e672044d98e5c4cff5fcbdb34b55a2df0c0f (patch)
tree6b12a4975cb050ecc7eda4273a26d58ee92cb5bd /drivers/net/can
parentafc016d8360ceb19a1f37bf6579d5850d47d582d (diff)
downloadlinux-30c1e672044d98e5c4cff5fcbdb34b55a2df0c0f.tar.xz
can: flexcan: add hardware controller version support
At least in the i.MX series, the flexcan contrller divides into ver_3 and ver_10, current driver is for ver_3 controller. i.MX6 has ver_10 controller, it has more reigsters than ver_3 has. The rxfgmask (Rx FIFO Global Mask) register is one of the new added. Its reset value is 0xffffffff, this means ID Filter Table must be checked when receive a packet, but the driver is designed to accept everything during the chip start, we need to clear this register to follow this design. Use the data entry of the struct of_device_id to point chip specific info, we can set hardware version for each platform. Cc: linux-can@vger.kernel.org Cc: Marc Kleine-Budde <mkl@pengutronix.de> Cc: Wolfgang Grandegger <wg@grandegger.com> Cc: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Hui Wang <jason77.wang@gmail.com> [mkl: add id_table support] Tested-by: Hui Wang <jason77.wang@gmail.com> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Diffstat (limited to 'drivers/net/can')
-rw-r--r--drivers/net/can/flexcan.c60
1 files changed, 52 insertions, 8 deletions
diff --git a/drivers/net/can/flexcan.c b/drivers/net/can/flexcan.c
index b429b3f3fa7f..81324a11a50f 100644
--- a/drivers/net/can/flexcan.c
+++ b/drivers/net/can/flexcan.c
@@ -34,6 +34,7 @@
#include <linux/list.h>
#include <linux/module.h>
#include <linux/of.h>
+#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/pinctrl/consumer.h>
@@ -165,10 +166,21 @@ struct flexcan_regs {
u32 imask1; /* 0x28 */
u32 iflag2; /* 0x2c */
u32 iflag1; /* 0x30 */
- u32 _reserved2[19];
+ u32 crl2; /* 0x34 */
+ u32 esr2; /* 0x38 */
+ u32 imeur; /* 0x3c */
+ u32 lrfr; /* 0x40 */
+ u32 crcr; /* 0x44 */
+ u32 rxfgmask; /* 0x48 */
+ u32 rxfir; /* 0x4c */
+ u32 _reserved3[12];
struct flexcan_mb cantxfg[64];
};
+struct flexcan_devtype_data {
+ u32 hw_ver; /* hardware controller version */
+};
+
struct flexcan_priv {
struct can_priv can;
struct net_device *dev;
@@ -180,6 +192,15 @@ struct flexcan_priv {
struct clk *clk;
struct flexcan_platform_data *pdata;
+ struct flexcan_devtype_data *devtype_data;
+};
+
+static struct flexcan_devtype_data fsl_p1010_devtype_data = {
+ .hw_ver = 3,
+};
+
+static struct flexcan_devtype_data fsl_imx6q_devtype_data = {
+ .hw_ver = 10,
};
static struct can_bittiming_const flexcan_bittiming_const = {
@@ -750,6 +771,9 @@ static int flexcan_chip_start(struct net_device *dev)
flexcan_write(0x0, &regs->rx14mask);
flexcan_write(0x0, &regs->rx15mask);
+ if (priv->devtype_data->hw_ver >= 10)
+ flexcan_write(0x0, &regs->rxfgmask);
+
flexcan_transceiver_switch(priv, 1);
/* synchronize with the can bus */
@@ -922,8 +946,21 @@ static void __devexit unregister_flexcandev(struct net_device *dev)
unregister_candev(dev);
}
+static const struct of_device_id flexcan_of_match[] = {
+ { .compatible = "fsl,p1010-flexcan", .data = &fsl_p1010_devtype_data, },
+ { .compatible = "fsl,imx6q-flexcan", .data = &fsl_imx6q_devtype_data, },
+ { /* sentinel */ },
+};
+
+static const struct platform_device_id flexcan_id_table[] = {
+ { .name = "flexcan", .driver_data = (kernel_ulong_t)&fsl_p1010_devtype_data, },
+ { /* sentinel */ },
+};
+
static int __devinit flexcan_probe(struct platform_device *pdev)
{
+ const struct of_device_id *of_id;
+ struct flexcan_devtype_data *devtype_data;
struct net_device *dev;
struct flexcan_priv *priv;
struct resource *mem;
@@ -977,6 +1014,17 @@ static int __devinit flexcan_probe(struct platform_device *pdev)
goto failed_alloc;
}
+ of_id = of_match_device(flexcan_of_match, &pdev->dev);
+ if (of_id) {
+ devtype_data = of_id->data;
+ } else if (pdev->id_entry->driver_data) {
+ devtype_data = (struct flexcan_devtype_data *)
+ pdev->id_entry->driver_data;
+ } else {
+ err = -ENODEV;
+ goto failed_devtype;
+ }
+
dev->netdev_ops = &flexcan_netdev_ops;
dev->irq = irq;
dev->flags |= IFF_ECHO;
@@ -993,6 +1041,7 @@ static int __devinit flexcan_probe(struct platform_device *pdev)
priv->dev = dev;
priv->clk = clk;
priv->pdata = pdev->dev.platform_data;
+ priv->devtype_data = devtype_data;
netif_napi_add(dev, &priv->napi, flexcan_poll, FLEXCAN_NAPI_WEIGHT);
@@ -1011,6 +1060,7 @@ static int __devinit flexcan_probe(struct platform_device *pdev)
return 0;
failed_register:
+ failed_devtype:
free_candev(dev);
failed_alloc:
iounmap(base);
@@ -1044,13 +1094,6 @@ static int __devexit flexcan_remove(struct platform_device *pdev)
return 0;
}
-static struct of_device_id flexcan_of_match[] = {
- {
- .compatible = "fsl,p1010-flexcan",
- },
- {},
-};
-
#ifdef CONFIG_PM
static int flexcan_suspend(struct platform_device *pdev, pm_message_t state)
{
@@ -1097,6 +1140,7 @@ static struct platform_driver flexcan_driver = {
.remove = __devexit_p(flexcan_remove),
.suspend = flexcan_suspend,
.resume = flexcan_resume,
+ .id_table = flexcan_id_table,
};
module_platform_driver(flexcan_driver);