b53: allow configuration through device tree
Add support for the same binding as upstream b53 to allow an easy switch. Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
This commit is contained in:
Jonas Gorski
parent
9ceeaf4c6c
commit
5df15c06cc
3 changed files with 180 additions and 19 deletions
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@ -24,6 +24,8 @@
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/switch.h>
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#include <linux/of.h>
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#include <linux/of_net.h>
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#include <linux/platform_data/b53.h>
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#include "b53_regs.h"
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@ -478,35 +480,88 @@ static void b53_switch_reset_gpio(struct b53_device *dev)
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dev->current_page = 0xff;
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}
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static int b53_switch_reset(struct b53_device *dev)
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static int b53_configure_ports_of(struct b53_device *dev)
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{
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u8 cpu_port = dev->sw_dev.cpu_port;
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u8 mgmt;
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struct device_node *dn, *pn;
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u32 port_num;
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b53_switch_reset_gpio(dev);
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dn = of_get_child_by_name(dev_of_node(dev->dev), "ports");
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if (is539x(dev)) {
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b53_write8(dev, B53_CTRL_PAGE, B53_SOFTRESET, 0x83);
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b53_write8(dev, B53_CTRL_PAGE, B53_SOFTRESET, 0x00);
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}
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for_each_available_child_of_node(dn, pn) {
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struct device_node *fixed_link;
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b53_read8(dev, B53_CTRL_PAGE, B53_SWITCH_MODE, &mgmt);
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if (of_property_read_u32(pn, "reg", &port_num))
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continue;
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if (!(mgmt & SM_SW_FWD_EN)) {
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mgmt &= ~SM_SW_FWD_MODE;
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mgmt |= SM_SW_FWD_EN;
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if (port_num > B53_CPU_PORT)
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continue;
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b53_write8(dev, B53_CTRL_PAGE, B53_SWITCH_MODE, mgmt);
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b53_read8(dev, B53_CTRL_PAGE, B53_SWITCH_MODE, &mgmt);
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fixed_link = of_get_child_by_name(pn, "fixed-link");
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if (fixed_link) {
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u32 spd;
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u8 po = GMII_PO_LINK;
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int mode = of_get_phy_mode(pn);
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if (!(mgmt & SM_SW_FWD_EN)) {
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pr_err("Failed to enable switch!\n");
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return -EINVAL;
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if (!of_property_read_u32(fixed_link, "speed", &spd)) {
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switch (spd) {
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case 10:
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po |= GMII_PO_SPEED_10M;
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break;
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case 100:
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po |= GMII_PO_SPEED_100M;
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break;
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case 2000:
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if (is_imp_port(dev, port_num))
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po |= PORT_OVERRIDE_SPEED_2000M;
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else
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po |= GMII_PO_SPEED_2000M;
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/* fall through */
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case 1000:
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po |= GMII_PO_SPEED_1000M;
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break;
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}
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}
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if (of_property_read_bool(fixed_link, "full-duplex"))
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po |= PORT_OVERRIDE_FULL_DUPLEX;
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if (of_property_read_bool(fixed_link, "pause"))
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po |= GMII_PO_RX_FLOW;
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if (of_property_read_bool(fixed_link, "asym-pause"))
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po |= GMII_PO_TX_FLOW;
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if (is_imp_port(dev, port_num)) {
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po |= PORT_OVERRIDE_EN;
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if (is5325(dev) &&
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mode == PHY_INTERFACE_MODE_REVMII)
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po |= PORT_OVERRIDE_RV_MII_25;
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b53_write8(dev, B53_CTRL_PAGE,
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B53_PORT_OVERRIDE_CTRL, po);
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if (is5325(dev) &&
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mode == PHY_INTERFACE_MODE_REVMII) {
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b53_read8(dev, B53_CTRL_PAGE,
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B53_PORT_OVERRIDE_CTRL, &po);
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if (!(po & PORT_OVERRIDE_RV_MII_25))
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pr_err("Failed to enable reverse MII mode\n");
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return -EINVAL;
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}
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} else {
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po |= GMII_PO_EN;
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b53_write8(dev, B53_CTRL_PAGE,
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B53_GMII_PORT_OVERRIDE_CTRL(port_num),
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po);
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}
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}
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}
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/* enable all ports */
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b53_enable_ports(dev);
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return 0;
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}
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static int b53_configure_ports(struct b53_device *dev)
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{
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u8 cpu_port = dev->sw_dev.cpu_port;
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/* configure MII port if necessary */
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if (is5325(dev)) {
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@ -576,6 +631,47 @@ static int b53_switch_reset(struct b53_device *dev)
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}
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}
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return 0;
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}
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static int b53_switch_reset(struct b53_device *dev)
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{
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int ret = 0;
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u8 mgmt;
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b53_switch_reset_gpio(dev);
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if (is539x(dev)) {
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b53_write8(dev, B53_CTRL_PAGE, B53_SOFTRESET, 0x83);
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b53_write8(dev, B53_CTRL_PAGE, B53_SOFTRESET, 0x00);
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}
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b53_read8(dev, B53_CTRL_PAGE, B53_SWITCH_MODE, &mgmt);
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if (!(mgmt & SM_SW_FWD_EN)) {
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mgmt &= ~SM_SW_FWD_MODE;
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mgmt |= SM_SW_FWD_EN;
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b53_write8(dev, B53_CTRL_PAGE, B53_SWITCH_MODE, mgmt);
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b53_read8(dev, B53_CTRL_PAGE, B53_SWITCH_MODE, &mgmt);
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if (!(mgmt & SM_SW_FWD_EN)) {
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pr_err("Failed to enable switch!\n");
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return -EINVAL;
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}
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}
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/* enable all ports */
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b53_enable_ports(dev);
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if (dev->dev->of_node)
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ret = b53_configure_ports_of(dev);
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else
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ret = b53_configure_ports(dev);
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if (ret)
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return ret;
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b53_enable_mib(dev);
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return b53_flush_arl(dev);
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@ -1320,6 +1416,43 @@ static const struct b53_chip_data b53_switch_chips[] = {
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},
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};
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static int b53_switch_init_of(struct b53_device *dev)
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{
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struct device_node *dn, *pn;
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const char *alias;
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u32 port_num;
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u16 ports = 0;
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dn = of_get_child_by_name(dev_of_node(dev->dev), "ports");
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if (!dn)
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return -EINVAL;
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for_each_available_child_of_node(dn, pn) {
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const char *label;
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int len;
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if (of_property_read_u32(pn, "reg", &port_num))
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continue;
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if (port_num > B53_CPU_PORT)
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continue;
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ports |= BIT(port_num);
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label = of_get_property(pn, "label", &len);
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if (label && !strcmp(label, "cpu"))
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dev->sw_dev.cpu_port = port_num;
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}
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dev->enabled_ports = ports;
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if (!of_property_read_string(dev_of_node(dev->dev), "lede,alias",
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&alias))
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dev->sw_dev.alias = devm_kstrdup(dev->dev, alias, GFP_KERNEL);
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return 0;
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}
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static int b53_switch_init(struct b53_device *dev)
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{
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struct switch_dev *sw_dev = &dev->sw_dev;
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@ -1383,6 +1516,12 @@ static int b53_switch_init(struct b53_device *dev)
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sw_dev->cpu_port = 5;
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}
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if (dev_of_node(dev->dev)) {
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ret = b53_switch_init_of(dev);
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if (ret)
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return ret;
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}
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dev->enabled_ports |= BIT(sw_dev->cpu_port);
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sw_dev->ports = fls(dev->enabled_ports);
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@ -170,6 +170,14 @@ static inline int is_cpu_port(struct b53_device *dev, int port)
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return dev->sw_dev.cpu_port == port;
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}
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static inline int is_imp_port(struct b53_device *dev, int port)
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{
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if (is5325(dev) || is5365(dev))
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return port == B53_CPU_PORT_25;
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else
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return port == B53_CPU_PORT;
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}
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static inline struct b53_device *sw_to_b53(struct switch_dev *sw)
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{
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return container_of(sw, struct b53_device, sw_dev);
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@ -21,6 +21,7 @@
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/spi/spi.h>
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#include <linux/of.h>
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#include <linux/platform_data/b53.h>
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#include "b53_priv.h"
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@ -313,11 +314,24 @@ static int b53_spi_remove(struct spi_device *spi)
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return 0;
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}
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static const struct of_device_id b53_of_match[] = {
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{ .compatible = "brcm,bcm5325" },
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{ .compatible = "brcm,bcm53115" },
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{ .compatible = "brcm,bcm53125" },
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{ .compatible = "brcm,bcm53128" },
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{ .compatible = "brcm,bcm5365" },
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{ .compatible = "brcm,bcm5395" },
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{ .compatible = "brcm,bcm5397" },
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{ .compatible = "brcm,bcm5398" },
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{ /* sentinel */ },
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};
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static struct spi_driver b53_spi_driver = {
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.driver = {
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.name = "b53-switch",
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.bus = &spi_bus_type,
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.owner = THIS_MODULE,
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.of_match_table = b53_of_match,
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},
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.probe = b53_spi_probe,
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.remove = b53_spi_remove,
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