davinci: Add EMAC support for da850/omap-l138

Ethernet Media Access Controller (EMAC) on da850/omap-l138
supports 10/100 Mbps operation. It also supports Media
Independent Interface (MII) and Reduced Media Independent
Interface (RMII) to physical layer (PHY).

Phy which supports MII is present on the DA850/OMAP-L138
base board and Phy supporting RMII is present on the
UI card. This patch adds support only for the MII Phy.
Support for RMII Phy will be added later.

Signed-off-by: Sudhakar Rajashekhara <sudhakar.raj@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>

4 files changed, 67 insertions, 0 deletions

diff --git a/arch/arm/mach-davinci/board-da850-evm.c b/arch/arm/mach-davinci/board-da850-evm.c
index eaa1fc1bc5f5..d98934629604 100644
--- a/arch/arm/mach-davinci/board-da850-evm.c
+++ b/arch/arm/mach-davinci/board-da850-evm.c
@@ -26,6 +26,9 @@
 #include <mach/cp_intc.h>
 #include <mach/da8xx.h>
 
+#define DA850_EVM_PHY_MASK              0x1
+#define DA850_EVM_MDIO_FREQUENCY        2200000 /* PHY bus frequency */
+
 static struct davinci_i2c_platform_data da850_evm_i2c_0_pdata = {
         .bus_freq       = 100,  /* kHz */
         .bus_delay      = 0,    /* usec */
@@ -37,6 +40,7 @@ static struct davinci_uart_config da850_evm_uart_config __initdata = {
 
 static __init void da850_evm_init(void)
 {
+        struct davinci_soc_info *soc_info = &davinci_soc_info;
         int ret;
 
         ret = da8xx_register_edma();
@@ -54,6 +58,20 @@ static __init void da850_evm_init(void)
                 pr_warning("da850_evm_init: i2c0 registration failed: %d\n",
                                 ret);
 
+        soc_info->emac_pdata->phy_mask = DA850_EVM_PHY_MASK;
+        soc_info->emac_pdata->mdio_max_freq = DA850_EVM_MDIO_FREQUENCY;
+        soc_info->emac_pdata->rmii_en = 0;
+
+        ret = da8xx_pinmux_setup(da850_cpgmac_pins);
+        if (ret)
+                pr_warning("da850_evm_init: cpgmac mux setup failed: %d\n",
+                                ret);
+
+        ret = da8xx_register_emac();
+        if (ret)
+                pr_warning("da850_evm_init: emac registration failed: %d\n",
+                                ret);
+
         ret = da8xx_register_watchdog();
         if (ret)
                 pr_warning("da830_evm_init: watchdog registration failed: %d\n",
diff --git a/arch/arm/mach-davinci/da850.c b/arch/arm/mach-davinci/da850.c
index 332cf7fadb1f..4a43ae2bec09 100644
--- a/arch/arm/mach-davinci/da850.c
+++ b/arch/arm/mach-davinci/da850.c
@@ -283,6 +283,12 @@ static struct clk rmii_clk = {
         .parent         = &pll0_sysclk7,
 };
 
+static struct clk emac_clk = {
+        .name           = "emac",
+        .parent         = &pll0_sysclk4,
+        .lpsc           = DA8XX_LPSC1_CPGMAC,
+};
+
 static struct davinci_clk da850_clks[] = {
         CLK(NULL,               "ref",          &ref_clk),
         CLK(NULL,               "pll0",         &pll0_clk),
@@ -319,6 +325,7 @@ static struct davinci_clk da850_clks[] = {
         CLK(NULL,               "emif3",        &emif3_clk),
         CLK(NULL,               "arm",          &arm_clk),
         CLK(NULL,               "rmii",         &rmii_clk),
+        CLK("davinci_emac.1",   NULL,           &emac_clk),
         CLK(NULL,               NULL,           NULL),
 };
 
@@ -347,6 +354,22 @@ static const struct mux_config da850_pins[] = {
         /* I2C0 function */
         MUX_CFG(DA850, I2C0_SDA,        4,      12,     15,     2,      false)
         MUX_CFG(DA850, I2C0_SCL,        4,      8,      15,     2,      false)
+        /* EMAC function */
+        MUX_CFG(DA850, MII_TXEN,        2,      4,      15,     8,      false)
+        MUX_CFG(DA850, MII_TXCLK,       2,      8,      15,     8,      false)
+        MUX_CFG(DA850, MII_COL,         2,      12,     15,     8,      false)
+        MUX_CFG(DA850, MII_TXD_3,       2,      16,     15,     8,      false)
+        MUX_CFG(DA850, MII_TXD_2,       2,      20,     15,     8,      false)
+        MUX_CFG(DA850, MII_TXD_1,       2,      24,     15,     8,      false)
+        MUX_CFG(DA850, MII_TXD_0,       2,      28,     15,     8,      false)
+        MUX_CFG(DA850, MII_RXCLK,       3,      0,      15,     8,      false)
+        MUX_CFG(DA850, MII_RXDV,        3,      4,      15,     8,      false)
+        MUX_CFG(DA850, MII_RXER,        3,      8,      15,     8,      false)
+        MUX_CFG(DA850, MII_CRS,         3,      12,     15,     8,      false)
+        MUX_CFG(DA850, MII_RXD_3,       3,      16,     15,     8,      false)
+        MUX_CFG(DA850, MII_RXD_2,       3,      20,     15,     8,      false)
+        MUX_CFG(DA850, MII_RXD_1,       3,      24,     15,     8,      false)
+        MUX_CFG(DA850, MII_RXD_0,       3,      28,     15,     8,      false)
 #endif
 };
 
@@ -375,6 +398,14 @@ const short da850_i2c1_pins[] __initdata = {
         -1
 };
 
+const short da850_cpgmac_pins[] __initdata = {
+        DA850_MII_TXEN, DA850_MII_TXCLK, DA850_MII_COL, DA850_MII_TXD_3,
+        DA850_MII_TXD_2, DA850_MII_TXD_1, DA850_MII_TXD_0, DA850_MII_RXER,
+        DA850_MII_CRS, DA850_MII_RXCLK, DA850_MII_RXDV, DA850_MII_RXD_3,
+        DA850_MII_RXD_2, DA850_MII_RXD_1, DA850_MII_RXD_0,
+        -1
+};
+
 /* FIQ are pri 0-1; otherwise 2-7, with 7 lowest priority */
 static u8 da850_default_priorities[DA850_N_CP_INTC_IRQ] = {
         [IRQ_DA8XX_COMMTX]              = 7,
diff --git a/arch/arm/mach-davinci/include/mach/da8xx.h b/arch/arm/mach-davinci/include/mach/da8xx.h
index 594f9882e422..a8cb5709848d 100644
--- a/arch/arm/mach-davinci/include/mach/da8xx.h
+++ b/arch/arm/mach-davinci/include/mach/da8xx.h
@@ -99,6 +99,7 @@ extern const short da850_uart1_pins[];
 extern const short da850_uart2_pins[];
 extern const short da850_i2c0_pins[];
 extern const short da850_i2c1_pins[];
+extern const short da850_cpgmac_pins[];
 
 int da8xx_pinmux_setup(const short pins[]);
 
diff --git a/arch/arm/mach-davinci/include/mach/mux.h b/arch/arm/mach-davinci/include/mach/mux.h
index 3349fa5f82e1..368fca69197d 100644
--- a/arch/arm/mach-davinci/include/mach/mux.h
+++ b/arch/arm/mach-davinci/include/mach/mux.h
@@ -730,6 +730,23 @@ enum davinci_da850_index {
         /* I2C0 function */
         DA850_I2C0_SDA,
         DA850_I2C0_SCL,
+
+        /* EMAC function */
+        DA850_MII_TXEN,
+        DA850_MII_TXCLK,
+        DA850_MII_COL,
+        DA850_MII_TXD_3,
+        DA850_MII_TXD_2,
+        DA850_MII_TXD_1,
+        DA850_MII_TXD_0,
+        DA850_MII_RXER,
+        DA850_MII_CRS,
+        DA850_MII_RXCLK,
+        DA850_MII_RXDV,
+        DA850_MII_RXD_3,
+        DA850_MII_RXD_2,
+        DA850_MII_RXD_1,
+        DA850_MII_RXD_0,
 };
 
 #ifdef CONFIG_DAVINCI_MUX