Adding support for CPSW Ethernet support found in DRA7xx EVM
Signed-off-by: Mugunthan V N mugunthanvnm@ti.com --- arch/arm/cpu/armv7/omap5/prcm-regs.c | 4 + arch/arm/include/asm/arch-omap5/cpu.h | 6 ++ arch/arm/include/asm/arch-omap5/omap.h | 26 ++++++ arch/arm/include/asm/omap_common.h | 4 + board/ti/dra7xx/evm.c | 150 ++++++++++++++++++++++++++++++-- 5 files changed, 185 insertions(+), 5 deletions(-)
diff --git a/arch/arm/cpu/armv7/omap5/prcm-regs.c b/arch/arm/cpu/armv7/omap5/prcm-regs.c index 1b4ab84..29129f6 100644 --- a/arch/arm/cpu/armv7/omap5/prcm-regs.c +++ b/arch/arm/cpu/armv7/omap5/prcm-regs.c @@ -394,6 +394,10 @@ struct omap_sys_ctrl_regs const omap5_ctrl = {
struct omap_sys_ctrl_regs const dra7xx_ctrl = { .control_status = 0x4A002134, + .control_core_mac_id_0_lo = 0x4A002514, + .control_core_mac_id_0_hi = 0x4A002518, + .control_core_mac_id_1_lo = 0x4A00251C, + .control_core_mac_id_1_hi = 0x4A002520, .control_core_mmr_lock1 = 0x4A002540, .control_core_mmr_lock2 = 0x4A002544, .control_core_mmr_lock3 = 0x4A002548, diff --git a/arch/arm/include/asm/arch-omap5/cpu.h b/arch/arm/include/asm/arch-omap5/cpu.h index 4753f46..347f104 100644 --- a/arch/arm/include/asm/arch-omap5/cpu.h +++ b/arch/arm/include/asm/arch-omap5/cpu.h @@ -116,6 +116,8 @@ struct watchdog { #endif /* __ASSEMBLY__ */ #endif /* __KERNEL_STRICT_NAMES */
+#define BIT(x) (1 << (x)) + #define WD_UNLOCK1 0xAAAA #define WD_UNLOCK2 0x5555
@@ -175,4 +177,8 @@ struct watchdog { #define PRM_RSTST (PRM_DEVICE_BASE + 0x4) #define PRM_RSTST_WARM_RESET_MASK 0x7FEA
+/* DRA7XX CPSW Config space */ +#define CPSW_BASE 0x48484000 +#define CPSW_MDIO_BASE 0x48485000 + #endif /* _CPU_H */ diff --git a/arch/arm/include/asm/arch-omap5/omap.h b/arch/arm/include/asm/arch-omap5/omap.h index 5e6d82e..929ee67 100644 --- a/arch/arm/include/asm/arch-omap5/omap.h +++ b/arch/arm/include/asm/arch-omap5/omap.h @@ -208,6 +208,27 @@ struct s32ktimer { #define OMAP5_ABB_LDOVBBMPU_MUX_CTRL_MASK (0x1 << 10) #define OMAP5_ABB_LDOVBBMPU_VSET_OUT_MASK (0x1f << 0)
+/* IO Delay module defines */ +#define CFG_IO_DELAY_BASE 0x4844A000 +#define CFG_IO_DELAY_LOCK (CFG_IO_DELAY_BASE + 0x02C) + +/* CPSW IO Delay registers*/ +#define CFG_RGMII0_TXCTL (CFG_IO_DELAY_BASE + 0x74C) +#define CFG_RGMII0_TXD0 (CFG_IO_DELAY_BASE + 0x758) +#define CFG_RGMII0_TXD1 (CFG_IO_DELAY_BASE + 0x764) +#define CFG_RGMII0_TXD2 (CFG_IO_DELAY_BASE + 0x770) +#define CFG_RGMII0_TXD3 (CFG_IO_DELAY_BASE + 0x77C) +#define CFG_VIN2A_D13 (CFG_IO_DELAY_BASE + 0xA7C) +#define CFG_VIN2A_D17 (CFG_IO_DELAY_BASE + 0xAAC) +#define CFG_VIN2A_D16 (CFG_IO_DELAY_BASE + 0xAA0) +#define CFG_VIN2A_D15 (CFG_IO_DELAY_BASE + 0xA94) +#define CFG_VIN2A_D14 (CFG_IO_DELAY_BASE + 0xA88) + +#define CFG_IO_DELAY_UNLOCK_KEY 0x0000AAAA +#define CFG_IO_DELAY_LOCK_KEY 0x0000AAAB +#define CFG_IO_DELAY_ACCESS_PATTERN 0x00029000 +#define CFG_IO_DELAY_LOCK_MASK 0x400 + #ifndef __ASSEMBLY__ struct srcomp_params { s8 divide_factor; @@ -224,5 +245,10 @@ struct ctrl_ioregs { u32 ctrl_emif_sdram_config_ext; u32 ctrl_ddr_ctrl_ext_0; }; + +struct io_delay { + u32 addr; + u32 dly; +}; #endif /* __ASSEMBLY__ */ #endif diff --git a/arch/arm/include/asm/omap_common.h b/arch/arm/include/asm/omap_common.h index 4a4a769..75198cf 100644 --- a/arch/arm/include/asm/omap_common.h +++ b/arch/arm/include/asm/omap_common.h @@ -364,6 +364,10 @@ struct prcm_regs {
struct omap_sys_ctrl_regs { u32 control_status; + u32 control_core_mac_id_0_lo; + u32 control_core_mac_id_0_hi; + u32 control_core_mac_id_1_lo; + u32 control_core_mac_id_1_hi; u32 control_std_fuse_opp_vdd_mpu_2; u32 control_core_mmr_lock1; u32 control_core_mmr_lock2; diff --git a/board/ti/dra7xx/evm.c b/board/ti/dra7xx/evm.c index bf7e091..4cbd162 100644 --- a/board/ti/dra7xx/evm.c +++ b/board/ti/dra7xx/evm.c @@ -39,12 +39,53 @@ #include <asm/ehci-omap.h> #endif
+#ifdef CONFIG_DRIVER_TI_CPSW +#include <cpsw.h> +#endif + DECLARE_GLOBAL_DATA_PTR;
const struct omap_sysinfo sysinfo = { "Board: DRA7xx\n" };
+/* + * Adjust I/O delays on the Tx control and data lines of each MAC port. This + * is a workaround in order to work properly with the DP83865 PHYs on the EVM. + * In 3COM RGMII mode this PHY applies it's own internal clock delay, so we + * essentially need to counteract the DRA7xx internal delay, and we do this + * by delaying the control and data lines. If not using this PHY, you probably + * don't need to do this stuff! + */ +static void dra7xx_adj_io_delay(const struct io_delay *io_dly) +{ + int i = 0; + u32 reg_val; + u32 delta; + u32 coarse; + u32 fine; + + writel(CFG_IO_DELAY_UNLOCK_KEY, CFG_IO_DELAY_LOCK); + + while(io_dly[i].addr) { + writel(CFG_IO_DELAY_ACCESS_PATTERN & ~CFG_IO_DELAY_LOCK_MASK, + io_dly[i].addr); + delta = io_dly[i].dly; + reg_val = readl(io_dly[i].addr) & 0x3ff; + coarse = ((reg_val >> 5) & 0x1F) + ((delta >> 5) & 0x1F); + coarse = (coarse > 0x1F) ? (0x1F) : (coarse); + fine = (reg_val & 0x1F) + (delta & 0x1F); + fine = (fine > 0x1F) ? (0x1F) : (fine); + reg_val = CFG_IO_DELAY_ACCESS_PATTERN | + CFG_IO_DELAY_LOCK_MASK | + ((coarse << 5) | (fine)); + writel(reg_val, io_dly[i].addr); + i++; + } + + writel(CFG_IO_DELAY_LOCK_KEY, CFG_IO_DELAY_LOCK); +} + /** * @brief board_init * @@ -58,11 +99,6 @@ int board_init(void) return 0; }
-int board_eth_init(bd_t *bis) -{ - return 0; -} - /** * @brief misc_init_r - Configure EVM board specific configurations * such as power configurations, ethernet initialization as phase2 of @@ -101,3 +137,107 @@ int board_mmc_init(bd_t *bis) return 0; } #endif + +#ifdef CONFIG_DRIVER_TI_CPSW + +/* Delay value to add to calibrated value */ +#define RGMII0_TXCTL_DLY_VAL ((0x3 << 5) + 0x8) +#define RGMII0_TXD0_DLY_VAL ((0x3 << 5) + 0x8) +#define RGMII0_TXD1_DLY_VAL ((0x3 << 5) + 0x2) +#define RGMII0_TXD2_DLY_VAL ((0x4 << 5) + 0x0) +#define RGMII0_TXD3_DLY_VAL ((0x4 << 5) + 0x0) +#define VIN2A_D13_DLY_VAL ((0x3 << 5) + 0x8) +#define VIN2A_D17_DLY_VAL ((0x3 << 5) + 0x8) +#define VIN2A_D16_DLY_VAL ((0x3 << 5) + 0x2) +#define VIN2A_D15_DLY_VAL ((0x4 << 5) + 0x0) +#define VIN2A_D14_DLY_VAL ((0x4 << 5) + 0x0) + +static void cpsw_control(int enabled) +{ + /* VTP can be added here */ + + return; +} + +static struct cpsw_slave_data cpsw_slaves[] = { + { + .slave_reg_ofs = 0x208, + .sliver_reg_ofs = 0xd80, + .phy_id = 0, + }, + { + .slave_reg_ofs = 0x308, + .sliver_reg_ofs = 0xdc0, + .phy_id = 1, + }, +}; + +static struct cpsw_platform_data cpsw_data = { + .mdio_base = CPSW_MDIO_BASE, + .cpsw_base = CPSW_BASE, + .mdio_div = 0xff, + .channels = 8, + .cpdma_reg_ofs = 0x800, + .slaves = 1, + .slave_data = cpsw_slaves, + .ale_reg_ofs = 0xd00, + .ale_entries = 1024, + .host_port_reg_ofs = 0x108, + .hw_stats_reg_ofs = 0x900, + .bd_ram_ofs = 0x2000, + .mac_control = (1 << 5), + .control = cpsw_control, + .host_port_num = 0, + .version = CPSW_CTRL_VERSION_2, +}; + +int board_eth_init(bd_t *bis) +{ + int ret; + uint8_t mac_addr[6]; + uint32_t mac_hi, mac_lo; + uint32_t ctrl_val; + const struct io_delay io_dly[] = { + {CFG_RGMII0_TXCTL, RGMII0_TXCTL_DLY_VAL}, + {CFG_RGMII0_TXD0, RGMII0_TXD0_DLY_VAL}, + {CFG_RGMII0_TXD1, RGMII0_TXD1_DLY_VAL}, + {CFG_RGMII0_TXD2, RGMII0_TXD2_DLY_VAL}, + {CFG_RGMII0_TXD3, RGMII0_TXD3_DLY_VAL}, + {CFG_VIN2A_D13, VIN2A_D13_DLY_VAL}, + {CFG_VIN2A_D17, VIN2A_D17_DLY_VAL}, + {CFG_VIN2A_D16, VIN2A_D16_DLY_VAL}, + {CFG_VIN2A_D15, VIN2A_D15_DLY_VAL}, + {CFG_VIN2A_D14, VIN2A_D14_DLY_VAL}, + {0} + }; + + /* Adjust IO delay for RGMII tx path */ + dra7xx_adj_io_delay(io_dly); + + /* try reading mac address from efuse */ + mac_lo = readl((*ctrl)->control_core_mac_id_0_lo); + mac_hi = readl((*ctrl)->control_core_mac_id_0_hi); + mac_addr[0] = mac_hi & 0xFF; + mac_addr[1] = (mac_hi & 0xFF00) >> 8; + mac_addr[2] = (mac_hi & 0xFF0000) >> 16; + mac_addr[3] = mac_lo & 0xFF; + mac_addr[4] = (mac_lo & 0xFF00) >> 8; + mac_addr[5] = (mac_lo & 0xFF0000) >> 16; + + if (!getenv("ethaddr")) { + printf("<ethaddr> not set. Validating first E-fuse MAC\n"); + + if (is_valid_ether_addr(mac_addr)) + eth_setenv_enetaddr("ethaddr", mac_addr); + } + ctrl_val = readl((*ctrl)->control_core_control_io1) & (~0x33); + ctrl_val |= 0x22; + writel(ctrl_val, (*ctrl)->control_core_control_io1); + + ret = cpsw_register(&cpsw_data); + if (ret < 0) + printf("Error %d registering CPSW switch\n", ret); + + return ret; +} +#endif