X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=target%2Flinux%2Fgeneric%2Ffiles%2Fdrivers%2Fnet%2Fphy%2Frtl8366_smi.c;h=44074633e2a9e64babe1fdaa6e88ce9d581913fb;hb=d8678644f9b18f36bdd5e7825e09c65dfcd049dc;hp=e34c84c97e6c6ffb0fcaa46633d83443bc6c08b0;hpb=792a1fb2c05a03fd77178d0e3a7e6147e33330fc;p=lede.git 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 e34c84c97e..44074633e2 100644 --- a/target/linux/generic/files/drivers/net/phy/rtl8366_smi.c +++ b/target/linux/generic/files/drivers/net/phy/rtl8366_smi.c @@ -15,19 +15,24 @@ #include #include #include +#include +#include +#include -#ifdef CONFIG_RTL8366S_PHY_DEBUG_FS +#ifdef CONFIG_RTL8366_SMI_DEBUG_FS #include #endif #include "rtl8366_smi.h" #define RTL8366_SMI_ACK_RETRY_COUNT 5 -#define RTL8366_SMI_CLK_DELAY 10 /* nsec */ + +#define RTL8366_SMI_HW_STOP_DELAY 25 /* msecs */ +#define RTL8366_SMI_HW_START_DELAY 100 /* msecs */ static inline void rtl8366_smi_clk_delay(struct rtl8366_smi *smi) { - ndelay(RTL8366_SMI_CLK_DELAY); + ndelay(smi->clk_delay); } static void rtl8366_smi_start(struct rtl8366_smi *smi) @@ -142,8 +147,10 @@ static int rtl8366_smi_wait_for_ack(struct rtl8366_smi *smi) if (ack == 0) break; - if (++retry_cnt > RTL8366_SMI_ACK_RETRY_COUNT) - return -EIO; + if (++retry_cnt > RTL8366_SMI_ACK_RETRY_COUNT) { + dev_err(smi->parent, "ACK timeout\n"); + return -ETIMEDOUT; + } } while (1); return 0; @@ -155,6 +162,12 @@ static int rtl8366_smi_write_byte(struct rtl8366_smi *smi, u8 data) return rtl8366_smi_wait_for_ack(smi); } +static int rtl8366_smi_write_byte_noack(struct rtl8366_smi *smi, u8 data) +{ + rtl8366_smi_write_bits(smi, data, 8); + return 0; +} + static int rtl8366_smi_read_byte0(struct rtl8366_smi *smi, u8 *data) { u32 t; @@ -195,7 +208,7 @@ int rtl8366_smi_read_reg(struct rtl8366_smi *smi, u32 addr, u32 *data) rtl8366_smi_start(smi); /* send READ command */ - ret = rtl8366_smi_write_byte(smi, 0x0a << 4 | 0x04 << 1 | 0x01); + ret = rtl8366_smi_write_byte(smi, smi->cmd_read); if (ret) goto out; @@ -226,7 +239,8 @@ int rtl8366_smi_read_reg(struct rtl8366_smi *smi, u32 addr, u32 *data) } EXPORT_SYMBOL_GPL(rtl8366_smi_read_reg); -int rtl8366_smi_write_reg(struct rtl8366_smi *smi, u32 addr, u32 data) +static int __rtl8366_smi_write_reg(struct rtl8366_smi *smi, + u32 addr, u32 data, bool ack) { unsigned long flags; int ret; @@ -236,7 +250,7 @@ int rtl8366_smi_write_reg(struct rtl8366_smi *smi, u32 addr, u32 data) rtl8366_smi_start(smi); /* send WRITE command */ - ret = rtl8366_smi_write_byte(smi, 0x0a << 4 | 0x04 << 1 | 0x00); + ret = rtl8366_smi_write_byte(smi, smi->cmd_write); if (ret) goto out; @@ -256,7 +270,10 @@ int rtl8366_smi_write_reg(struct rtl8366_smi *smi, u32 addr, u32 data) goto out; /* write DATA[15:8] */ - ret = rtl8366_smi_write_byte(smi, data >> 8); + if (ack) + ret = rtl8366_smi_write_byte(smi, data >> 8); + else + ret = rtl8366_smi_write_byte_noack(smi, data >> 8); if (ret) goto out; @@ -268,8 +285,19 @@ int rtl8366_smi_write_reg(struct rtl8366_smi *smi, u32 addr, u32 data) return ret; } + +int rtl8366_smi_write_reg(struct rtl8366_smi *smi, u32 addr, u32 data) +{ + return __rtl8366_smi_write_reg(smi, addr, data, true); +} EXPORT_SYMBOL_GPL(rtl8366_smi_write_reg); +int rtl8366_smi_write_reg_noack(struct rtl8366_smi *smi, u32 addr, u32 data) +{ + return __rtl8366_smi_write_reg(smi, addr, data, false); +} +EXPORT_SYMBOL_GPL(rtl8366_smi_write_reg_noack); + int rtl8366_smi_rmwr(struct rtl8366_smi *smi, u32 addr, u32 mask, u32 data) { u32 t; @@ -285,6 +313,19 @@ int rtl8366_smi_rmwr(struct rtl8366_smi *smi, u32 addr, u32 mask, u32 data) } EXPORT_SYMBOL_GPL(rtl8366_smi_rmwr); +static int rtl8366_reset(struct rtl8366_smi *smi) +{ + if (smi->hw_reset) { + smi->hw_reset(true); + msleep(RTL8366_SMI_HW_STOP_DELAY); + smi->hw_reset(false); + msleep(RTL8366_SMI_HW_START_DELAY); + return 0; + } + + return smi->ops->reset_chip(smi); +} + static int rtl8366_mc_is_used(struct rtl8366_smi *smi, int mc_index, int *used) { int err; @@ -556,7 +597,7 @@ static int rtl8366_init_vlan(struct rtl8366_smi *smi) return rtl8366_enable_vlan(smi, 1); } -#ifdef CONFIG_RTL8366S_PHY_DEBUG_FS +#ifdef CONFIG_RTL8366_SMI_DEBUG_FS int rtl8366_debugfs_open(struct inode *inode, struct file *file) { file->private_data = inode->i_private; @@ -867,7 +908,7 @@ static void rtl8366_debugfs_remove(struct rtl8366_smi *smi) #else static inline void rtl8366_debugfs_init(struct rtl8366_smi *smi) {} static inline void rtl8366_debugfs_remove(struct rtl8366_smi *smi) {} -#endif /* CONFIG_RTL8366S_PHY_DEBUG_FS */ +#endif /* CONFIG_RTL8366_SMI_DEBUG_FS */ static int rtl8366_smi_mii_init(struct rtl8366_smi *smi) { @@ -910,6 +951,31 @@ static void rtl8366_smi_mii_cleanup(struct rtl8366_smi *smi) mdiobus_free(smi->mii_bus); } +int rtl8366_sw_reset_switch(struct switch_dev *dev) +{ + struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev); + int err; + + err = rtl8366_reset(smi); + if (err) + return err; + + err = smi->ops->setup(smi); + if (err) + return err; + + err = rtl8366_reset_vlan(smi); + if (err) + return err; + + err = rtl8366_enable_vlan(smi, 1); + if (err) + return err; + + return rtl8366_enable_all_ports(smi, 1); +} +EXPORT_SYMBOL_GPL(rtl8366_sw_reset_switch); + int rtl8366_sw_get_port_pvid(struct switch_dev *dev, int port, int *val) { struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev); @@ -1160,29 +1226,99 @@ 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); + /* start the switch */ + if (smi->hw_reset) { + smi->hw_reset(false); + msleep(RTL8366_SMI_HW_START_DELAY); + } + + return 0; + + err_free_sda: + gpio_free(smi->gpio_sda); + err_out: + return err; +} + +static void __rtl8366_smi_cleanup(struct rtl8366_smi *smi) +{ + if (smi->hw_reset) + smi->hw_reset(true); + + 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; + smi.clk_delay = 10; + smi.cmd_read = 0xa9; + smi.cmd_write = 0xa8; + + if (__rtl8366_smi_init(&smi, "rtl8366")) + goto out; + + if (rtl8366_smi_read_reg(&smi, 0x5c, ®)) + 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; + dev_info(smi->parent, "using GPIO pins %u (SDA) and %u (SCK)\n", smi->gpio_sda, smi->gpio_sck); @@ -1192,6 +1328,10 @@ int rtl8366_smi_init(struct rtl8366_smi *smi) goto err_free_sck; } + err = rtl8366_reset(smi); + if (err) + goto err_free_sck; + err = smi->ops->setup(smi); if (err) { dev_err(smi->parent, "chip setup failed, err=%d\n", err); @@ -1202,12 +1342,12 @@ int rtl8366_smi_init(struct rtl8366_smi *smi) if (err) { dev_err(smi->parent, "VLAN initialization failed, err=%d\n", err); - goto err_disable_hw; + goto err_free_sck; } err = rtl8366_enable_all_ports(smi, 1); if (err) - goto err_disable_hw; + goto err_free_sck; err = rtl8366_smi_mii_init(smi); if (err) @@ -1218,9 +1358,7 @@ 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; } @@ -1230,11 +1368,75 @@ void rtl8366_smi_cleanup(struct rtl8366_smi *smi) { rtl8366_debugfs_remove(smi); rtl8366_smi_mii_cleanup(smi); - gpio_free(smi->gpio_sck); - gpio_free(smi->gpio_sda); + __rtl8366_smi_cleanup(smi); } EXPORT_SYMBOL_GPL(rtl8366_smi_cleanup); +#ifdef CONFIG_OF +int rtl8366_smi_probe_of(struct platform_device *pdev, struct rtl8366_smi *smi) +{ + int sck = of_get_named_gpio(pdev->dev.of_node, "gpio-sck", 0); + int sda = of_get_named_gpio(pdev->dev.of_node, "gpio-sda", 0); + + if (!sck || !sda) { + dev_err(&pdev->dev, "gpios missing in devictree\n"); + return -EINVAL; + } + + smi->gpio_sda = sda; + smi->gpio_sck = sck; + + return 0; +} +#else +static inline int rtl8366_smi_probe_of(struct device_node *np, struct rtl8366_smi *smi) +{ + return -ENODEV; +} +#endif + +int rtl8366_smi_probe_plat(struct platform_device *pdev, struct rtl8366_smi *smi) +{ + struct rtl8366_platform_data *pdata = pdev->dev.platform_data; + + if (!pdev->dev.platform_data) { + dev_err(&pdev->dev, "no platform data specified\n"); + return -EINVAL; + } + + smi->gpio_sda = pdata->gpio_sda; + smi->gpio_sck = pdata->gpio_sck; + smi->hw_reset = pdata->hw_reset; + + return 0; +} + + +struct rtl8366_smi *rtl8366_smi_probe(struct platform_device *pdev) +{ + struct rtl8366_smi *smi; + int err; + + smi = rtl8366_smi_alloc(&pdev->dev); + if (!smi) + return NULL; + + if (pdev->dev.of_node) + err = rtl8366_smi_probe_of(pdev, smi); + else + err = rtl8366_smi_probe_plat(pdev, smi); + + if (err) + goto free_smi; + + return smi; + +free_smi: + kfree(smi); + return NULL; +} +EXPORT_SYMBOL_GPL(rtl8366_smi_probe); + MODULE_DESCRIPTION("Realtek RTL8366 SMI interface driver"); MODULE_AUTHOR("Gabor Juhos "); MODULE_LICENSE("GPL v2");