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| author | Florian Fainelli <f.fainelli@gmail.com> | 2017-01-20 12:36:29 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-01-22 16:58:31 -0500 |
| commit | a78e86ed586dba0808f765a9498f1fcd803f6ac6 (patch) | |
| tree | 5314cd7aa6e14c527fb7b0bb4a6172047d0caf7b /drivers/net/dsa/bcm_sf2.c | |
| parent | 329b5c58f8b2833f330d64d5a2a1517a0c1e070e (diff) | |
| download | lwn-a78e86ed586dba0808f765a9498f1fcd803f6ac6.tar.gz lwn-a78e86ed586dba0808f765a9498f1fcd803f6ac6.zip | |
net: dsa: bcm_sf2: Prepare for different register layouts
In preparation for supporting a new device with a slightly different
register layout, affecting the SWITCH_REG and SWITCH_CORE address
spaces, perform a few preparatory steps:
- allow matching the compatible string against a data description
- convert the SWITCH_REG register accesses into an indirection table
- prepare for supporting a SWITCH_CORE register alignment requirement
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/dsa/bcm_sf2.c')
| -rw-r--r-- | drivers/net/dsa/bcm_sf2.c | 57 |
1 files changed, 51 insertions, 6 deletions
diff --git a/drivers/net/dsa/bcm_sf2.c b/drivers/net/dsa/bcm_sf2.c index 31d017086f8b..d952099afc60 100644 --- a/drivers/net/dsa/bcm_sf2.c +++ b/drivers/net/dsa/bcm_sf2.c @@ -1009,10 +1009,49 @@ static const struct dsa_switch_ops bcm_sf2_ops = { .port_fdb_del = b53_fdb_del, }; +struct bcm_sf2_of_data { + u32 type; + const u16 *reg_offsets; + unsigned int core_reg_align; +}; + +/* Register offsets for the SWITCH_REG_* block */ +static const u16 bcm_sf2_7445_reg_offsets[] = { + [REG_SWITCH_CNTRL] = 0x00, + [REG_SWITCH_STATUS] = 0x04, + [REG_DIR_DATA_WRITE] = 0x08, + [REG_DIR_DATA_READ] = 0x0C, + [REG_SWITCH_REVISION] = 0x18, + [REG_PHY_REVISION] = 0x1C, + [REG_SPHY_CNTRL] = 0x2C, + [REG_RGMII_0_CNTRL] = 0x34, + [REG_RGMII_1_CNTRL] = 0x40, + [REG_RGMII_2_CNTRL] = 0x4c, + [REG_LED_0_CNTRL] = 0x90, + [REG_LED_1_CNTRL] = 0x94, + [REG_LED_2_CNTRL] = 0x98, +}; + +static const struct bcm_sf2_of_data bcm_sf2_7445_data = { + .type = BCM7445_DEVICE_ID, + .core_reg_align = 0, + .reg_offsets = bcm_sf2_7445_reg_offsets, +}; + +static const struct of_device_id bcm_sf2_of_match[] = { + { .compatible = "brcm,bcm7445-switch-v4.0", + .data = &bcm_sf2_7445_data + }, + { /* sentinel */ }, +}; +MODULE_DEVICE_TABLE(of, bcm_sf2_of_match); + static int bcm_sf2_sw_probe(struct platform_device *pdev) { const char *reg_names[BCM_SF2_REGS_NUM] = BCM_SF2_REGS_NAME; struct device_node *dn = pdev->dev.of_node; + const struct of_device_id *of_id = NULL; + const struct bcm_sf2_of_data *data; struct b53_platform_data *pdata; struct dsa_switch_ops *ops; struct bcm_sf2_priv *priv; @@ -1040,11 +1079,22 @@ static int bcm_sf2_sw_probe(struct platform_device *pdev) if (!pdata) return -ENOMEM; + of_id = of_match_node(bcm_sf2_of_match, dn); + if (!of_id || !of_id->data) + return -EINVAL; + + data = of_id->data; + + /* Set SWITCH_REG register offsets and SWITCH_CORE align factor */ + priv->type = data->type; + priv->reg_offsets = data->reg_offsets; + priv->core_reg_align = data->core_reg_align; + /* Auto-detection using standard registers will not work, so * provide an indication of what kind of device we are for * b53_common to work with */ - pdata->chip_id = BCM7445_DEVICE_ID; + pdata->chip_id = priv->type; dev->pdata = pdata; priv->dev = dev; @@ -1190,11 +1240,6 @@ static int bcm_sf2_resume(struct device *dev) static SIMPLE_DEV_PM_OPS(bcm_sf2_pm_ops, bcm_sf2_suspend, bcm_sf2_resume); -static const struct of_device_id bcm_sf2_of_match[] = { - { .compatible = "brcm,bcm7445-switch-v4.0" }, - { /* sentinel */ }, -}; -MODULE_DEVICE_TABLE(of, bcm_sf2_of_match); static struct platform_driver bcm_sf2_driver = { .probe = bcm_sf2_sw_probe, |