[U-Boot] [PATCH] arm: bcm281xx: Add Ethernet Clock support
From: Jiandong Zheng jdzheng@broadcom.com
Enable Ethernet clock when Broadcom StarFighter2 Ethernet block (CONFIG_BCM_SF2_ETH) is enabled.
Signed-off-by: Jiandong Zheng jdzheng@broadcom.com Signed-off-by: Steve Rae srae@broadcom.com --- - added board with this feature enabled
arch/arm/cpu/armv7/bcm281xx/Makefile | 1 + arch/arm/cpu/armv7/bcm281xx/clk-bcm281xx.c | 34 +++++++ arch/arm/cpu/armv7/bcm281xx/clk-eth.c | 143 ++++++++++++++++++++++++++++ arch/arm/include/asm/arch-bcm281xx/sysmap.h | 3 + boards.cfg | 1 + 5 files changed, 182 insertions(+) create mode 100644 arch/arm/cpu/armv7/bcm281xx/clk-eth.c
diff --git a/arch/arm/cpu/armv7/bcm281xx/Makefile b/arch/arm/cpu/armv7/bcm281xx/Makefile index 98f5aa5..bd867a2 100644 --- a/arch/arm/cpu/armv7/bcm281xx/Makefile +++ b/arch/arm/cpu/armv7/bcm281xx/Makefile @@ -9,3 +9,4 @@ obj-y += clk-core.o obj-y += clk-bcm281xx.o obj-y += clk-sdio.o obj-y += clk-bsc.o +obj-$(CONFIG_BCM_SF2_ETH) += clk-eth.o diff --git a/arch/arm/cpu/armv7/bcm281xx/clk-bcm281xx.c b/arch/arm/cpu/armv7/bcm281xx/clk-bcm281xx.c index bc8a170..d16b99f 100644 --- a/arch/arm/cpu/armv7/bcm281xx/clk-bcm281xx.c +++ b/arch/arm/cpu/armv7/bcm281xx/clk-bcm281xx.c @@ -118,6 +118,16 @@ unsigned long slave_apb_freq_tbl[8] = { 78 * CLOCK_1M };
+unsigned long esub_freq_tbl[8] = { + 78 * CLOCK_1M, + 156 * CLOCK_1M, + 156 * CLOCK_1M, + 156 * CLOCK_1M, + 208 * CLOCK_1M, + 208 * CLOCK_1M, + 208 * CLOCK_1M +}; + static struct bus_clk_data bsc1_apb_data = { .gate = HW_SW_GATE_AUTO(0x0458, 16, 0, 1), }; @@ -295,6 +305,27 @@ static struct ccu_clock kps_ccu_clk = { .freq_tbl = slave_axi_freq_tbl, };
+#ifdef CONFIG_BCM_SF2_ETH +static struct ccu_clock esub_ccu_clk = { + .clk = { + .name = "esub_ccu_clk", + .ops = &ccu_clk_ops, + .ccu_clk_mgr_base = ESUB_CLK_BASE_ADDR, + }, + .num_policy_masks = 1, + .policy_freq_offset = 0x00000008, + .freq_bit_shift = 8, + .policy_ctl_offset = 0x0000000c, + .policy0_mask_offset = 0x00000010, + .policy1_mask_offset = 0x00000014, + .policy2_mask_offset = 0x00000018, + .policy3_mask_offset = 0x0000001c, + .lvm_en_offset = 0x00000034, + .freq_id = 2, + .freq_tbl = esub_freq_tbl, +}; +#endif + /* * Bus clocks */ @@ -517,6 +548,9 @@ struct clk_lookup arch_clk_tbl[] = { CLK_LK(bsc1_apb), CLK_LK(bsc2_apb), CLK_LK(bsc3_apb), +#ifdef CONFIG_BCM_SF2_ETH + CLK_LK(esub_ccu), +#endif };
/* public array size */ diff --git a/arch/arm/cpu/armv7/bcm281xx/clk-eth.c b/arch/arm/cpu/armv7/bcm281xx/clk-eth.c new file mode 100644 index 0000000..b0b92b9 --- /dev/null +++ b/arch/arm/cpu/armv7/bcm281xx/clk-eth.c @@ -0,0 +1,143 @@ +/* + * Copyright 2014 Broadcom Corporation. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <asm/io.h> +#include <asm/errno.h> +#include <asm/arch/sysmap.h> +#include <asm/kona-common/clk.h> +#include "clk-core.h" + +#define WR_ACCESS_ADDR ESUB_CLK_BASE_ADDR +#define WR_ACCESS_PASSWORD 0xA5A500 + +#define PLLE_POST_RESETB_ADDR (ESUB_CLK_BASE_ADDR + 0x00000C00) + +#define PLLE_RESETB_ADDR (ESUB_CLK_BASE_ADDR + 0x00000C58) +#define PLLE_RESETB_I_PLL_RESETB_PLLE_MASK 0x00010000 +#define PLLE_POST_RESETB_I_POST_RESETB_PLLE_MASK 0x00000001 + +#define PLL_LOCK_ADDR (ESUB_CLK_BASE_ADDR + 0x00000C38) +#define PLL_LOCK_PLL_LOCK_PLLE_MASK 0x00000001 + +#define ESW_SYS_DIV_ADDR (ESUB_CLK_BASE_ADDR + 0x00000A04) +#define ESW_SYS_DIV_PLL_SELECT_MASK 0x00000300 +#define ESW_SYS_DIV_DIV_MASK 0x0000001C +#define ESW_SYS_DIV_PLL_VAR_208M_CLK_SELECT 0x00000100 +#define ESW_SYS_DIV_DIV_SELECT 0x4 +#define ESW_SYS_DIV_TRIGGER_MASK 0x00000001 + +#define ESUB_AXI_DIV_DEBUG_ADDR (ESUB_CLK_BASE_ADDR + 0x00000E04) +#define ESUB_AXI_DIV_DEBUG_PLL_SELECT_MASK 0x0000001C +#define ESUB_AXI_DIV_DEBUG_PLL_SELECT_OVERRIDE_MASK 0x00000040 +#define ESUB_AXI_DIV_DEBUG_PLL_VAR_208M_CLK_SELECT 0x0 +#define ESUB_AXI_DIV_DEBUG_TRIGGER_MASK 0x00000001 + +#define PLL_MAX_RETRY 100 + +/* Enable appropriate clocks for Ethernet */ +int clk_eth_enable(void) +{ + int rc = -1; + int retry_count = 0; + rc = clk_get_and_enable("esub_ccu_clk"); + + /* Enable Access to CCU registers */ + writel((1 | WR_ACCESS_PASSWORD), WR_ACCESS_ADDR); + + writel(readl(PLLE_POST_RESETB_ADDR) & + ~PLLE_POST_RESETB_I_POST_RESETB_PLLE_MASK, + PLLE_POST_RESETB_ADDR); + + /* Take PLL out of reset and put into normal mode */ + writel(readl(PLLE_RESETB_ADDR) | PLLE_RESETB_I_PLL_RESETB_PLLE_MASK, + PLLE_RESETB_ADDR); + + /* Wait for PLL lock */ + rc = -1; + while (retry_count < PLL_MAX_RETRY) { + udelay(100); + if (readl(PLL_LOCK_ADDR) & PLL_LOCK_PLL_LOCK_PLLE_MASK) { + rc = 0; + break; + } + retry_count++; + } + + if (rc == -1) { + printf("%s: ETH-PLL lock timeout, Ethernet is not enabled!\n", + __func__); + return -1; + } + + writel(readl(PLLE_POST_RESETB_ADDR) | + PLLE_POST_RESETB_I_POST_RESETB_PLLE_MASK, + PLLE_POST_RESETB_ADDR); + + /* Switch esw_sys_clk to use 104MHz(208MHz/2) clock */ + writel((readl(ESW_SYS_DIV_ADDR) & + ~(ESW_SYS_DIV_PLL_SELECT_MASK | ESW_SYS_DIV_DIV_MASK)) | + ESW_SYS_DIV_PLL_VAR_208M_CLK_SELECT | ESW_SYS_DIV_DIV_SELECT, + ESW_SYS_DIV_ADDR); + + writel(readl(ESW_SYS_DIV_ADDR) | ESW_SYS_DIV_TRIGGER_MASK, + ESW_SYS_DIV_ADDR); + + /* Wait for trigger complete */ + rc = -1; + retry_count = 0; + while (retry_count < PLL_MAX_RETRY) { + udelay(100); + if (!(readl(ESW_SYS_DIV_ADDR) & ESW_SYS_DIV_TRIGGER_MASK)) { + rc = 0; + break; + } + retry_count++; + } + + if (rc == -1) { + printf("%s: SYS CLK Trigger timeout, Ethernet is not enabled!\n", + __func__); + return -1; + } + + /* switch Esub AXI clock to 208MHz */ + writel((readl(ESUB_AXI_DIV_DEBUG_ADDR) & + ~(ESUB_AXI_DIV_DEBUG_PLL_SELECT_MASK | + ESUB_AXI_DIV_DEBUG_PLL_SELECT_OVERRIDE_MASK | + ESUB_AXI_DIV_DEBUG_TRIGGER_MASK)) | + ESUB_AXI_DIV_DEBUG_PLL_VAR_208M_CLK_SELECT | + ESUB_AXI_DIV_DEBUG_PLL_SELECT_OVERRIDE_MASK, + ESUB_AXI_DIV_DEBUG_ADDR); + + writel(readl(ESUB_AXI_DIV_DEBUG_ADDR) | + ESUB_AXI_DIV_DEBUG_TRIGGER_MASK, + ESUB_AXI_DIV_DEBUG_ADDR); + + /* Wait for trigger complete */ + rc = -1; + retry_count = 0; + while (retry_count < PLL_MAX_RETRY) { + udelay(100); + if (!(readl(ESUB_AXI_DIV_DEBUG_ADDR) & + ESUB_AXI_DIV_DEBUG_TRIGGER_MASK)) { + rc = 0; + break; + } + retry_count++; + } + + if (rc == -1) { + printf("%s: AXI CLK Trigger timeout, Ethernet is not enabled!\n", + __func__); + return -1; + } + + /* Disable Access to CCU registers */ + writel(WR_ACCESS_PASSWORD, WR_ACCESS_ADDR); + + return rc; +} diff --git a/arch/arm/include/asm/arch-bcm281xx/sysmap.h b/arch/arm/include/asm/arch-bcm281xx/sysmap.h index 880b4e0..350e7f6 100644 --- a/arch/arm/include/asm/arch-bcm281xx/sysmap.h +++ b/arch/arm/include/asm/arch-bcm281xx/sysmap.h @@ -9,6 +9,9 @@ #define BSC1_BASE_ADDR 0x3e016000 #define BSC2_BASE_ADDR 0x3e017000 #define BSC3_BASE_ADDR 0x3e018000 +#define DWDMA_AHB_BASE_ADDR 0x38100000 +#define ESUB_CLK_BASE_ADDR 0x38000000 +#define ESW_CONTRL_BASE_ADDR 0x38200000 #define GPIO2_BASE_ADDR 0x35003000 #define KONA_MST_CLK_BASE_ADDR 0x3f001000 #define KONA_SLV_CLK_BASE_ADDR 0x3e011000 diff --git a/boards.cfg b/boards.cfg index 4b2bc19..d5427df 100644 --- a/boards.cfg +++ b/boards.cfg @@ -289,6 +289,7 @@ Active arm armv7 at91 atmel sama5d3xek Active arm armv7 at91 atmel sama5d3xek sama5d3xek_nandflash sama5d3xek:SAMA5D3,SYS_USE_NANDFLASH Bo Shen voice.shen@atmel.com Active arm armv7 at91 atmel sama5d3xek sama5d3xek_spiflash sama5d3xek:SAMA5D3,SYS_USE_SERIALFLASH Bo Shen voice.shen@atmel.com Active arm armv7 bcm281xx broadcom bcm28155_ap bcm28155_ap bcm28155_ap Tim Kryger tim.kryger@linaro.org +Active arm armv7 bcm281xx broadcom bcm28155_ap bcm28155_w1d bcm28155_ap:BCM_SF2_ETH Steve Rae srae@broadcom.com Active arm armv7 exynos samsung arndale arndale - Inderpal Singh inderpal.singh@linaro.org Active arm armv7 exynos samsung origen origen - Chander Kashyap k.chander@samsung.com Active arm armv7 exynos samsung smdk5250 smdk5250 - Chander Kashyap k.chander@samsung.com
participants (1)
-
Steve Rae