rtl8366_smi: implement a function for detecting whether the attached switch is RTL836...

SVN-Revision: 27755

diff --git a/target/linux/generic/files/drivers/net/phy/rtl8366_smi.c b/target/linux/generic/files/drivers/net/phy/rtl8366_smi.c
index 28e1a8505d4fd490c54f9bee8b0850538bd11561..281c4536707b39f5d2fe34511b50a3d8e3ac6f8a 100644 (file)
--- a/target/linux/generic/files/drivers/net/phy/rtl8366_smi.c
+++ b/target/linux/generic/files/drivers/net/phy/rtl8366_smi.c
@@ -15,6 +15,7 @@
 #include <linux/gpio.h>
 #include <linux/spinlock.h>
 #include <linux/skbuff.h>
+#include <linux/rtl8366.h>
 
 #ifdef CONFIG_RTL8366S_PHY_DEBUG_FS
 #include <linux/debugfs.h>
@@ -1160,27 +1161,86 @@ struct rtl8366_smi *rtl8366_smi_alloc(struct device *parent)
 }
 EXPORT_SYMBOL_GPL(rtl8366_smi_alloc);
 
-int rtl8366_smi_init(struct rtl8366_smi *smi)
+static int __rtl8366_smi_init(struct rtl8366_smi *smi, const char *name)
 {
        int err;
 
-       if (!smi->ops)
-               return -EINVAL;
-
-       err = gpio_request(smi->gpio_sda, dev_name(smi->parent));
+       err = gpio_request(smi->gpio_sda, name);
        if (err) {
-               dev_err(smi->parent, "gpio_request failed for %u, err=%d\n",
+               printk(KERN_ERR "rtl8366_smi: gpio_request failed for %u, err=%d\n",
                        smi->gpio_sda, err);
                goto err_out;
        }
 
-       err = gpio_request(smi->gpio_sck, dev_name(smi->parent));
+       err = gpio_request(smi->gpio_sck, name);
        if (err) {
-               dev_err(smi->parent, "gpio_request failed for %u, err=%d\n",
+               printk(KERN_ERR "rtl8366_smi: gpio_request failed for %u, err=%d\n",
                        smi->gpio_sck, err);
                goto err_free_sda;
        }
 
+       spin_lock_init(&smi->lock);
+       return 0;
+
+ err_free_sda:
+       gpio_free(smi->gpio_sda);
+ err_out:
+       return err;
+}
+
+static void __rtl8366_smi_cleanup(struct rtl8366_smi *smi)
+{
+       gpio_free(smi->gpio_sck);
+       gpio_free(smi->gpio_sda);
+}
+
+enum rtl8366_type rtl8366_smi_detect(struct rtl8366_platform_data *pdata)
+{
+       static struct rtl8366_smi smi;
+       enum rtl8366_type type = RTL8366_TYPE_UNKNOWN;
+       u32 reg = 0;
+
+       memset(&smi, 0, sizeof(smi));
+       smi.gpio_sda = pdata->gpio_sda;
+       smi.gpio_sck = pdata->gpio_sck;
+
+       if (__rtl8366_smi_init(&smi, "rtl8366"))
+               goto out;
+
+       if (rtl8366_smi_read_reg(&smi, 0x5c, &reg))
+               goto cleanup;
+
+       switch(reg) {
+       case 0x6027:
+               printk("Found an RTL8366S switch\n");
+               type = RTL8366_TYPE_S;
+               break;
+       case 0x5937:
+               printk("Found an RTL8366RB switch\n");
+               type = RTL8366_TYPE_RB;
+               break;
+       default:
+               printk("Found an Unknown RTL8366 switch (id=0x%04x)\n", reg);
+               break;
+       }
+
+cleanup:
+       __rtl8366_smi_cleanup(&smi);
+out:
+       return type;
+}
+
+int rtl8366_smi_init(struct rtl8366_smi *smi)
+{
+       int err;
+
+       if (!smi->ops)
+               return -EINVAL;
+
+       err = __rtl8366_smi_init(smi, dev_name(smi->parent));
+       if (err)
+               goto err_out;
+
        spin_lock_init(&smi->lock);
 
        dev_info(smi->parent, "using GPIO pins %u (SDA) and %u (SCK)\n",
@@ -1218,9 +1278,7 @@ int rtl8366_smi_init(struct rtl8366_smi *smi)
        return 0;
 
  err_free_sck:
-       gpio_free(smi->gpio_sck);
- err_free_sda:
-       gpio_free(smi->gpio_sda);
+       __rtl8366_smi_cleanup(smi);
  err_out:
        return err;
 }

diff --git a/target/linux/generic/files/include/linux/rtl8366.h b/target/linux/generic/files/include/linux/rtl8366.h
index 654d42e6098f9532a0e2f98e039456aaf0a14594..22ce614d404d1e972c69cde98bfd3e5d26ba477d 100644 (file)
--- a/target/linux/generic/files/include/linux/rtl8366.h
+++ b/target/linux/generic/files/include/linux/rtl8366.h
@@ -15,6 +15,12 @@
 #define RTL8366S_DRIVER_NAME   "rtl8366s"
 #define RTL8366RB_DRIVER_NAME  "rtl8366rb"
 
+enum rtl8366_type {
+       RTL8366_TYPE_UNKNOWN,
+       RTL8366_TYPE_S,
+       RTL8366_TYPE_RB,
+};
+
 struct rtl8366_initval {
        unsigned        reg;
        u16             val;
@@ -27,4 +33,6 @@ struct rtl8366_platform_data {
        struct rtl8366_initval *initvals;
 };
 
+enum rtl8366_type rtl8366_smi_detect(struct rtl8366_platform_data *pdata);
+
 #endif /*  _RTL8366_H */