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Message-ID: <1343679434-2369-3-git-send-email-mugunthanvnm@ti.com>
Date: Tue, 31 Jul 2012 01:47:14 +0530
From: Mugunthan V N <mugunthanvnm@...com>
To: <netdev@...r.kernel.org>
CC: <davem@...emloft.net>, Mugunthan V N <mugunthanvnm@...com>
Subject: [PATCH 2/2] drivers: net: ethernet: cpsw: Add device tree support to CPSW
This patch adds device tree support for cpsw driver
Signed-off-by: Mugunthan V N <mugunthanvnm@...com>
---
Documentation/devicetree/bindings/net/cpsw.txt | 104 ++++++++++++++
drivers/net/ethernet/ti/cpsw.c | 174 +++++++++++++++++++++++-
2 files changed, 272 insertions(+), 6 deletions(-)
create mode 100644 Documentation/devicetree/bindings/net/cpsw.txt
diff --git a/Documentation/devicetree/bindings/net/cpsw.txt b/Documentation/devicetree/bindings/net/cpsw.txt
new file mode 100644
index 0000000..acca48c
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/cpsw.txt
@@ -0,0 +1,104 @@
+TI SoC Ethernet Switch Controller Device Tree Bindings
+------------------------------------------------------
+
+Required properties:
+- compatible : Should be "ti,cpsw"
+- reg : physical base address and size of the cpsw
+ registers map
+- interrupts : property with a value describing the interrupt
+ number
+- interrupt-parent : The parent interrupt controller
+- cpdma_channels : Specifies number of channels in CPDMA
+- host_port_no : Specifies host port shift
+- cpdma_reg_ofs : Specifies CPDMA submodule register offset
+- ale_reg_ofs : Specifies ALE submodule register offset
+- ale_entries : Specifies No of entries ALE can hold
+- host_port_reg_ofs : Specifies host port register offset
+- hw_stats_reg_ofs : Specifies hardware statistics register offset
+- bd_ram_ofs : Specifies internal desciptor RAM offset
+- bd_ram_size : Specifies internal descriptor RAM size
+- rx_descs : Specifies number of Rx descriptors
+- mac_control : Specifies Default MAC control register content
+ for the specific platform
+- slaves : Specifies number for slaves
+- slave_reg_ofs : Specifies slave register offset
+- sliver_reg_ofs : Specifies slave sliver register offset
+- phy_id : Specifies slave phy id
+- mac-address : Specifies slave MAC address
+
+Optional properties:
+- ti,hwmods : Must be "cpgmac0"
+- no_bd_ram : Must be 0 or 1
+
+Note: "ti,hwmods" field is used to fetch the base address and irq
+resources from TI, omap hwmod data base during device registration.
+Future plan is to migrate hwmod data base contents into device tree
+blob so that, all the required data will be used from device tree dts
+file.
+
+Examples:
+
+ mac: ethernet@...00000 {
+ compatible = "ti,cpsw";
+ reg = <0x4A100000 0x1000>;
+ interrupts = <55 0x4>;
+ interrupt-parent = <&intc>;
+ cpdma_channels = 8;
+ host_port_no = 0;
+ cpdma_reg_ofs = 0x800;
+ ale_reg_ofs = 0xd00;
+ ale_entries = 1024;
+ host_port_reg_ofs = 0x108;
+ hw_stats_reg_ofs = 0x900;
+ bd_ram_ofs = 0x2000;
+ bd_ram_size = 0x2000;
+ no_bd_ram = 0;
+ rx_descs = 64;
+ mac_control = 0x20;
+ slaves = 2;
+ slave@0 {
+ slave_reg_ofs = 0x208;
+ sliver_reg_ofs = 0xd80;
+ phy_id = "davinci_mdio-0:00"
+ mac-address = [00 04 9F 01 1B B8];
+ };
+ slave@1 {
+ slave_reg_ofs = 0x208;
+ sliver_reg_ofs = 0xd80;
+ phy_id = "davinci_mdio-0:01"
+ mac-address = [00 04 9F 01 1B B9];
+ };
+ };
+
+(or)
+
+ mac: ethernet@...00000 {
+ compatible = "ti,cpsw";
+ ti,hwmods = "cpgmac0";
+ cpdma_channels = 8;
+ host_port_no = 0;
+ cpdma_reg_ofs = 0x800;
+ ale_reg_ofs = 0xd00;
+ ale_entries = 1024;
+ host_port_reg_ofs = 0x108;
+ hw_stats_reg_ofs = 0x900;
+ bd_ram_ofs = 0x2000;
+ bd_ram_size = 0x2000;
+ no_bd_ram = 0;
+ rx_descs = 64;
+ mac_control = 0x20;
+ slaves = 2;
+ slave@0 {
+ slave_reg_ofs = 0x208;
+ sliver_reg_ofs = 0xd80;
+ phy_id = "davinci_mdio-0:00"
+ mac-address = [00 04 9F 01 1B B8];
+ };
+ slave@1 {
+ slave_reg_ofs = 0x208;
+ sliver_reg_ofs = 0xd80;
+ phy_id = "davinci_mdio-0:01"
+ mac-address = [00 04 9F 01 1B B9];
+ };
+
+ };
diff --git a/drivers/net/ethernet/ti/cpsw.c b/drivers/net/ethernet/ti/cpsw.c
index 1e5d85b..0cbc0e5 100644
--- a/drivers/net/ethernet/ti/cpsw.c
+++ b/drivers/net/ethernet/ti/cpsw.c
@@ -28,6 +28,9 @@
#include <linux/workqueue.h>
#include <linux/delay.h>
#include <linux/pm_runtime.h>
+#include <linux/of.h>
+#include <linux/of_net.h>
+#include <linux/of_device.h>
#include <linux/platform_data/cpsw.h>
@@ -709,6 +712,158 @@ static void cpsw_slave_init(struct cpsw_slave *slave, struct cpsw_priv *priv)
slave->sliver = regs + data->sliver_reg_ofs;
}
+static int cpsw_probe_dt(struct cpsw_platform_data *data,
+ struct platform_device *pdev)
+{
+ struct device_node *node = pdev->dev.of_node;
+ struct device_node *slave_node;
+ int i = 0, ret;
+ u32 prop;
+
+ if (!node)
+ return -EINVAL;
+
+ if (of_property_read_u32(node, "slaves", &prop)) {
+ pr_err("Missing slaves property in the DT.\n");
+ return -EINVAL;
+ }
+ data->slaves = prop;
+
+ data->slave_data = kzalloc(sizeof(struct cpsw_slave_data) *
+ data->slaves, GFP_KERNEL);
+ if (!data->slave_data) {
+ pr_err("Could not allocate slave memory.\n");
+ return -EINVAL;
+ }
+
+ data->no_bd_ram = of_property_read_bool(node, "no_bd_ram");
+
+ if (of_property_read_u32(node, "cpdma_channels", &prop)) {
+ pr_err("Missing cpdma_channels property in the DT.\n");
+ ret = -EINVAL;
+ goto error_ret;
+ }
+ data->channels = prop;
+
+ if (of_property_read_u32(node, "host_port_no", &prop)) {
+ pr_err("Missing host_port_no property in the DT.\n");
+ ret = -EINVAL;
+ goto error_ret;
+ }
+ data->host_port_num = prop;
+
+ if (of_property_read_u32(node, "cpdma_reg_ofs", &prop)) {
+ pr_err("Missing cpdma_reg_ofs property in the DT.\n");
+ ret = -EINVAL;
+ goto error_ret;
+ }
+ data->cpdma_reg_ofs = prop;
+
+ if (of_property_read_u32(node, "cpdma_sram_ofs", &prop)) {
+ pr_err("Missing cpdma_sram_ofs property in the DT.\n");
+ ret = -EINVAL;
+ goto error_ret;
+ }
+ data->cpdma_sram_ofs = prop;
+
+ if (of_property_read_u32(node, "ale_reg_ofs", &prop)) {
+ pr_err("Missing ale_reg_ofs property in the DT.\n");
+ ret = -EINVAL;
+ goto error_ret;
+ }
+ data->ale_reg_ofs = prop;
+
+ if (of_property_read_u32(node, "ale_entries", &prop)) {
+ pr_err("Missing ale_entries property in the DT.\n");
+ ret = -EINVAL;
+ goto error_ret;
+ }
+ data->ale_entries = prop;
+
+ if (of_property_read_u32(node, "host_port_reg_ofs", &prop)) {
+ pr_err("Missing host_port_reg_ofs property in the DT.\n");
+ ret = -EINVAL;
+ goto error_ret;
+ }
+ data->host_port_reg_ofs = prop;
+
+ if (of_property_read_u32(node, "hw_stats_reg_ofs", &prop)) {
+ pr_err("Missing hw_stats_reg_ofs property in the DT.\n");
+ ret = -EINVAL;
+ goto error_ret;
+ }
+ data->hw_stats_reg_ofs = prop;
+
+ if (of_property_read_u32(node, "bd_ram_ofs", &prop)) {
+ pr_err("Missing bd_ram_ofs property in the DT.\n");
+ ret = -EINVAL;
+ goto error_ret;
+ }
+ data->bd_ram_ofs = prop;
+
+ if (of_property_read_u32(node, "bd_ram_size", &prop)) {
+ pr_err("Missing bd_ram_size property in the DT.\n");
+ ret = -EINVAL;
+ goto error_ret;
+ }
+ data->bd_ram_size = prop;
+
+ if (of_property_read_u32(node, "rx_descs", &prop)) {
+ pr_err("Missing rx_descs property in the DT.\n");
+ ret = -EINVAL;
+ goto error_ret;
+ }
+ data->rx_descs = prop;
+
+ if (of_property_read_u32(node, "mac_control", &prop)) {
+ pr_err("Missing mac_control property in the DT.\n");
+ ret = -EINVAL;
+ goto error_ret;
+ }
+ data->mac_control = prop;
+
+ for_each_child_of_node(node, slave_node) {
+ struct cpsw_slave_data *slave_data = data->slave_data + i;
+ const char *phy_id = NULL;
+ const void *mac_addr = NULL;
+
+ if (of_property_read_string(slave_node, "phy_id", &phy_id)) {
+ pr_err("Missing slave[%d] phy_id property\n", i);
+ ret = -EINVAL;
+ goto error_ret;
+ }
+ slave_data->phy_id = phy_id;
+
+ if (of_property_read_u32(slave_node, "slave_reg_ofs", &prop)) {
+ pr_err("Missing slave[%d] slave_reg_ofs property\n", i);
+ ret = -EINVAL;
+ goto error_ret;
+ }
+ slave_data->slave_reg_ofs = prop;
+
+ if (of_property_read_u32(slave_node, "sliver_reg_ofs",
+ &prop)) {
+ pr_err("Missing slave[%d] sliver_reg_ofs property\n",
+ i);
+ ret = -EINVAL;
+ goto error_ret;
+ }
+ slave_data->sliver_reg_ofs = prop;
+
+ mac_addr = of_get_mac_address(slave_node);
+ if (mac_addr)
+ memcpy(slave_data->mac_addr, mac_addr, ETH_ALEN);
+
+ i++;
+ }
+
+ return 0;
+
+error_ret:
+ kfree(data->slave_data);
+ return ret;
+}
+
static int __devinit cpsw_probe(struct platform_device *pdev)
{
struct cpsw_platform_data *data = pdev->dev.platform_data;
@@ -720,11 +875,6 @@ static int __devinit cpsw_probe(struct platform_device *pdev)
struct resource *res;
int ret = 0, i, k = 0;
- if (!data) {
- pr_err("platform data missing\n");
- return -ENODEV;
- }
-
ndev = alloc_etherdev(sizeof(struct cpsw_priv));
if (!ndev) {
pr_err("error allocating net_device\n");
@@ -734,13 +884,19 @@ static int __devinit cpsw_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, ndev);
priv = netdev_priv(ndev);
spin_lock_init(&priv->lock);
- priv->data = *data;
priv->pdev = pdev;
priv->ndev = ndev;
priv->dev = &ndev->dev;
priv->msg_enable = netif_msg_init(debug_level, CPSW_DEBUG);
priv->rx_packet_max = max(rx_packet_max, 128);
+ if (cpsw_probe_dt(&priv->data, pdev)) {
+ pr_err("cpsw: platform data missing\n");
+ ret = -ENODEV;
+ goto clean_ndev_ret;
+ }
+ data = &priv->data;
+
if (is_valid_ether_addr(data->slave_data[0].mac_addr)) {
memcpy(priv->mac_addr, data->slave_data[0].mac_addr, ETH_ALEN);
pr_info("Detected MACID = %pM", priv->mac_addr);
@@ -996,11 +1152,17 @@ static const struct dev_pm_ops cpsw_pm_ops = {
.resume = cpsw_resume,
};
+static const struct of_device_id cpsw_of_mtable[] = {
+ { .compatible = "ti,cpsw", },
+ { /* sentinel */ },
+};
+
static struct platform_driver cpsw_driver = {
.driver = {
.name = "cpsw",
.owner = THIS_MODULE,
.pm = &cpsw_pm_ops,
+ .of_match_table = of_match_ptr(cpsw_of_mtable),
},
.probe = cpsw_probe,
.remove = __devexit_p(cpsw_remove),
--
1.7.0.4
--
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