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-rw-r--r--arch/arm/cpu/armv7/bcm281xx/Makefile11
-rw-r--r--arch/arm/cpu/armv7/bcm281xx/clk-bcm281xx.c523
-rw-r--r--arch/arm/cpu/armv7/bcm281xx/clk-bsc.c52
-rw-r--r--arch/arm/cpu/armv7/bcm281xx/clk-core.c513
-rw-r--r--arch/arm/cpu/armv7/bcm281xx/clk-core.h495
-rw-r--r--arch/arm/cpu/armv7/bcm281xx/clk-sdio.c73
-rw-r--r--arch/arm/cpu/armv7/bcm281xx/reset.c27
7 files changed, 1694 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv7/bcm281xx/Makefile b/arch/arm/cpu/armv7/bcm281xx/Makefile
new file mode 100644
index 0000000..98f5aa5
--- /dev/null
+++ b/arch/arm/cpu/armv7/bcm281xx/Makefile
@@ -0,0 +1,11 @@
+#
+# Copyright 2013 Broadcom Corporation.
+#
+# SPDX-License-Identifier: GPL-2.0+
+#
+
+obj-y += reset.o
+obj-y += clk-core.o
+obj-y += clk-bcm281xx.o
+obj-y += clk-sdio.o
+obj-y += clk-bsc.o
diff --git a/arch/arm/cpu/armv7/bcm281xx/clk-bcm281xx.c b/arch/arm/cpu/armv7/bcm281xx/clk-bcm281xx.c
new file mode 100644
index 0000000..bc8a170
--- /dev/null
+++ b/arch/arm/cpu/armv7/bcm281xx/clk-bcm281xx.c
@@ -0,0 +1,523 @@
+/*
+ * Copyright 2013 Broadcom Corporation.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+/*
+ *
+ * bcm281xx-specific clock tables
+ *
+ */
+
+#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 CLOCK_1K 1000
+#define CLOCK_1M (CLOCK_1K * 1000)
+
+/* declare a reference clock */
+#define DECLARE_REF_CLK(clk_name, clk_parent, clk_rate, clk_div) \
+static struct refclk clk_name = { \
+ .clk = { \
+ .name = #clk_name, \
+ .parent = clk_parent, \
+ .rate = clk_rate, \
+ .div = clk_div, \
+ .ops = &ref_clk_ops, \
+ }, \
+}
+
+/*
+ * Reference clocks
+ */
+
+/* Declare a list of reference clocks */
+DECLARE_REF_CLK(ref_crystal, 0, 26 * CLOCK_1M, 1);
+DECLARE_REF_CLK(var_96m, 0, 96 * CLOCK_1M, 1);
+DECLARE_REF_CLK(ref_96m, 0, 96 * CLOCK_1M, 1);
+DECLARE_REF_CLK(ref_312m, 0, 312 * CLOCK_1M, 0);
+DECLARE_REF_CLK(ref_104m, &ref_312m.clk, 104 * CLOCK_1M, 3);
+DECLARE_REF_CLK(ref_52m, &ref_104m.clk, 52 * CLOCK_1M, 2);
+DECLARE_REF_CLK(ref_13m, &ref_52m.clk, 13 * CLOCK_1M, 4);
+DECLARE_REF_CLK(var_312m, 0, 312 * CLOCK_1M, 0);
+DECLARE_REF_CLK(var_104m, &var_312m.clk, 104 * CLOCK_1M, 3);
+DECLARE_REF_CLK(var_52m, &var_104m.clk, 52 * CLOCK_1M, 2);
+DECLARE_REF_CLK(var_13m, &var_52m.clk, 13 * CLOCK_1M, 4);
+
+struct refclk_lkup {
+ struct refclk *procclk;
+ const char *name;
+};
+
+/* Lookup table for string to clk tranlation */
+#define MKSTR(x) {&x, #x}
+static struct refclk_lkup refclk_str_tbl[] = {
+ MKSTR(ref_crystal), MKSTR(var_96m), MKSTR(ref_96m),
+ MKSTR(ref_312m), MKSTR(ref_104m), MKSTR(ref_52m),
+ MKSTR(ref_13m), MKSTR(var_312m), MKSTR(var_104m),
+ MKSTR(var_52m), MKSTR(var_13m),
+};
+
+int refclk_entries = sizeof(refclk_str_tbl)/sizeof(refclk_str_tbl[0]);
+
+/* convert ref clock string to clock structure pointer */
+struct refclk *refclk_str_to_clk(const char *name)
+{
+ int i;
+ struct refclk_lkup *tblp = refclk_str_tbl;
+ for (i = 0; i < refclk_entries; i++, tblp++) {
+ if (!(strcmp(name, tblp->name)))
+ return tblp->procclk;
+ }
+ return NULL;
+}
+
+/* frequency tables indexed by freq_id */
+unsigned long master_axi_freq_tbl[8] = {
+ 26 * CLOCK_1M,
+ 52 * CLOCK_1M,
+ 104 * CLOCK_1M,
+ 156 * CLOCK_1M,
+ 156 * CLOCK_1M,
+ 208 * CLOCK_1M,
+ 312 * CLOCK_1M,
+ 312 * CLOCK_1M
+};
+
+unsigned long master_ahb_freq_tbl[8] = {
+ 26 * CLOCK_1M,
+ 52 * CLOCK_1M,
+ 52 * CLOCK_1M,
+ 52 * CLOCK_1M,
+ 78 * CLOCK_1M,
+ 104 * CLOCK_1M,
+ 104 * CLOCK_1M,
+ 156 * CLOCK_1M
+};
+
+unsigned long slave_axi_freq_tbl[8] = {
+ 26 * CLOCK_1M,
+ 52 * CLOCK_1M,
+ 78 * CLOCK_1M,
+ 104 * CLOCK_1M,
+ 156 * CLOCK_1M,
+ 156 * CLOCK_1M
+};
+
+unsigned long slave_apb_freq_tbl[8] = {
+ 26 * CLOCK_1M,
+ 26 * CLOCK_1M,
+ 39 * CLOCK_1M,
+ 52 * CLOCK_1M,
+ 52 * CLOCK_1M,
+ 78 * CLOCK_1M
+};
+
+static struct bus_clk_data bsc1_apb_data = {
+ .gate = HW_SW_GATE_AUTO(0x0458, 16, 0, 1),
+};
+
+static struct bus_clk_data bsc2_apb_data = {
+ .gate = HW_SW_GATE_AUTO(0x045c, 16, 0, 1),
+};
+
+static struct bus_clk_data bsc3_apb_data = {
+ .gate = HW_SW_GATE_AUTO(0x0484, 16, 0, 1),
+};
+
+/* * Master CCU clocks */
+static struct peri_clk_data sdio1_data = {
+ .gate = HW_SW_GATE(0x0358, 18, 2, 3),
+ .clocks = CLOCKS("ref_crystal",
+ "var_52m",
+ "ref_52m",
+ "var_96m",
+ "ref_96m"),
+ .sel = SELECTOR(0x0a28, 0, 3),
+ .div = DIVIDER(0x0a28, 4, 14),
+ .trig = TRIGGER(0x0afc, 9),
+};
+
+static struct peri_clk_data sdio2_data = {
+ .gate = HW_SW_GATE(0x035c, 18, 2, 3),
+ .clocks = CLOCKS("ref_crystal",
+ "var_52m",
+ "ref_52m",
+ "var_96m",
+ "ref_96m"),
+ .sel = SELECTOR(0x0a2c, 0, 3),
+ .div = DIVIDER(0x0a2c, 4, 14),
+ .trig = TRIGGER(0x0afc, 10),
+};
+
+static struct peri_clk_data sdio3_data = {
+ .gate = HW_SW_GATE(0x0364, 18, 2, 3),
+ .clocks = CLOCKS("ref_crystal",
+ "var_52m",
+ "ref_52m",
+ "var_96m",
+ "ref_96m"),
+ .sel = SELECTOR(0x0a34, 0, 3),
+ .div = DIVIDER(0x0a34, 4, 14),
+ .trig = TRIGGER(0x0afc, 12),
+};
+
+static struct peri_clk_data sdio4_data = {
+ .gate = HW_SW_GATE(0x0360, 18, 2, 3),
+ .clocks = CLOCKS("ref_crystal",
+ "var_52m",
+ "ref_52m",
+ "var_96m",
+ "ref_96m"),
+ .sel = SELECTOR(0x0a30, 0, 3),
+ .div = DIVIDER(0x0a30, 4, 14),
+ .trig = TRIGGER(0x0afc, 11),
+};
+
+static struct peri_clk_data sdio1_sleep_data = {
+ .clocks = CLOCKS("ref_32k"),
+ .gate = SW_ONLY_GATE(0x0358, 20, 4),
+};
+
+static struct peri_clk_data sdio2_sleep_data = {
+ .clocks = CLOCKS("ref_32k"),
+ .gate = SW_ONLY_GATE(0x035c, 20, 4),
+};
+
+static struct peri_clk_data sdio3_sleep_data = {
+ .clocks = CLOCKS("ref_32k"),
+ .gate = SW_ONLY_GATE(0x0364, 20, 4),
+};
+
+static struct peri_clk_data sdio4_sleep_data = {
+ .clocks = CLOCKS("ref_32k"),
+ .gate = SW_ONLY_GATE(0x0360, 20, 4),
+};
+
+static struct bus_clk_data sdio1_ahb_data = {
+ .gate = HW_SW_GATE_AUTO(0x0358, 16, 0, 1),
+};
+
+static struct bus_clk_data sdio2_ahb_data = {
+ .gate = HW_SW_GATE_AUTO(0x035c, 16, 0, 1),
+};
+
+static struct bus_clk_data sdio3_ahb_data = {
+ .gate = HW_SW_GATE_AUTO(0x0364, 16, 0, 1),
+};
+
+static struct bus_clk_data sdio4_ahb_data = {
+ .gate = HW_SW_GATE_AUTO(0x0360, 16, 0, 1),
+};
+
+/* * Slave CCU clocks */
+static struct peri_clk_data bsc1_data = {
+ .gate = HW_SW_GATE(0x0458, 18, 2, 3),
+ .clocks = CLOCKS("ref_crystal",
+ "var_104m",
+ "ref_104m",
+ "var_13m",
+ "ref_13m"),
+ .sel = SELECTOR(0x0a64, 0, 3),
+ .trig = TRIGGER(0x0afc, 23),
+};
+
+static struct peri_clk_data bsc2_data = {
+ .gate = HW_SW_GATE(0x045c, 18, 2, 3),
+ .clocks = CLOCKS("ref_crystal",
+ "var_104m",
+ "ref_104m",
+ "var_13m",
+ "ref_13m"),
+ .sel = SELECTOR(0x0a68, 0, 3),
+ .trig = TRIGGER(0x0afc, 24),
+};
+
+static struct peri_clk_data bsc3_data = {
+ .gate = HW_SW_GATE(0x0484, 18, 2, 3),
+ .clocks = CLOCKS("ref_crystal",
+ "var_104m",
+ "ref_104m",
+ "var_13m",
+ "ref_13m"),
+ .sel = SELECTOR(0x0a84, 0, 3),
+ .trig = TRIGGER(0x0b00, 2),
+};
+
+/*
+ * CCU clocks
+ */
+
+static struct ccu_clock kpm_ccu_clk = {
+ .clk = {
+ .name = "kpm_ccu_clk",
+ .ops = &ccu_clk_ops,
+ .ccu_clk_mgr_base = KONA_MST_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 = master_axi_freq_tbl,
+};
+
+static struct ccu_clock kps_ccu_clk = {
+ .clk = {
+ .name = "kps_ccu_clk",
+ .ops = &ccu_clk_ops,
+ .ccu_clk_mgr_base = KONA_SLV_CLK_BASE_ADDR,
+ },
+ .num_policy_masks = 2,
+ .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,
+ .policy0_mask2_offset = 0x00000048,
+ .policy1_mask2_offset = 0x0000004c,
+ .policy2_mask2_offset = 0x00000050,
+ .policy3_mask2_offset = 0x00000054,
+ .lvm_en_offset = 0x00000034,
+ .freq_id = 2,
+ .freq_tbl = slave_axi_freq_tbl,
+};
+
+/*
+ * Bus clocks
+ */
+
+/* KPM bus clocks */
+static struct bus_clock sdio1_ahb_clk = {
+ .clk = {
+ .name = "sdio1_ahb_clk",
+ .parent = &kpm_ccu_clk.clk,
+ .ops = &bus_clk_ops,
+ .ccu_clk_mgr_base = KONA_MST_CLK_BASE_ADDR,
+ },
+ .freq_tbl = master_ahb_freq_tbl,
+ .data = &sdio1_ahb_data,
+};
+
+static struct bus_clock sdio2_ahb_clk = {
+ .clk = {
+ .name = "sdio2_ahb_clk",
+ .parent = &kpm_ccu_clk.clk,
+ .ops = &bus_clk_ops,
+ .ccu_clk_mgr_base = KONA_MST_CLK_BASE_ADDR,
+ },
+ .freq_tbl = master_ahb_freq_tbl,
+ .data = &sdio2_ahb_data,
+};
+
+static struct bus_clock sdio3_ahb_clk = {
+ .clk = {
+ .name = "sdio3_ahb_clk",
+ .parent = &kpm_ccu_clk.clk,
+ .ops = &bus_clk_ops,
+ .ccu_clk_mgr_base = KONA_MST_CLK_BASE_ADDR,
+ },
+ .freq_tbl = master_ahb_freq_tbl,
+ .data = &sdio3_ahb_data,
+};
+
+static struct bus_clock sdio4_ahb_clk = {
+ .clk = {
+ .name = "sdio4_ahb_clk",
+ .parent = &kpm_ccu_clk.clk,
+ .ops = &bus_clk_ops,
+ .ccu_clk_mgr_base = KONA_MST_CLK_BASE_ADDR,
+ },
+ .freq_tbl = master_ahb_freq_tbl,
+ .data = &sdio4_ahb_data,
+};
+
+static struct bus_clock bsc1_apb_clk = {
+ .clk = {
+ .name = "bsc1_apb_clk",
+ .parent = &kps_ccu_clk.clk,
+ .ops = &bus_clk_ops,
+ .ccu_clk_mgr_base = KONA_SLV_CLK_BASE_ADDR,
+ },
+ .freq_tbl = slave_apb_freq_tbl,
+ .data = &bsc1_apb_data,
+};
+
+static struct bus_clock bsc2_apb_clk = {
+ .clk = {
+ .name = "bsc2_apb_clk",
+ .parent = &kps_ccu_clk.clk,
+ .ops = &bus_clk_ops,
+ .ccu_clk_mgr_base = KONA_SLV_CLK_BASE_ADDR,
+ },
+ .freq_tbl = slave_apb_freq_tbl,
+ .data = &bsc2_apb_data,
+};
+
+static struct bus_clock bsc3_apb_clk = {
+ .clk = {
+ .name = "bsc3_apb_clk",
+ .parent = &kps_ccu_clk.clk,
+ .ops = &bus_clk_ops,
+ .ccu_clk_mgr_base = KONA_SLV_CLK_BASE_ADDR,
+ },
+ .freq_tbl = slave_apb_freq_tbl,
+ .data = &bsc3_apb_data,
+};
+
+/* KPM peripheral */
+static struct peri_clock sdio1_clk = {
+ .clk = {
+ .name = "sdio1_clk",
+ .parent = &ref_52m.clk,
+ .ops = &peri_clk_ops,
+ .ccu_clk_mgr_base = KONA_MST_CLK_BASE_ADDR,
+ },
+ .data = &sdio1_data,
+};
+
+static struct peri_clock sdio2_clk = {
+ .clk = {
+ .name = "sdio2_clk",
+ .parent = &ref_52m.clk,
+ .ops = &peri_clk_ops,
+ .ccu_clk_mgr_base = KONA_MST_CLK_BASE_ADDR,
+ },
+ .data = &sdio2_data,
+};
+
+static struct peri_clock sdio3_clk = {
+ .clk = {
+ .name = "sdio3_clk",
+ .parent = &ref_52m.clk,
+ .ops = &peri_clk_ops,
+ .ccu_clk_mgr_base = KONA_MST_CLK_BASE_ADDR,
+ },
+ .data = &sdio3_data,
+};
+
+static struct peri_clock sdio4_clk = {
+ .clk = {
+ .name = "sdio4_clk",
+ .parent = &ref_52m.clk,
+ .ops = &peri_clk_ops,
+ .ccu_clk_mgr_base = KONA_MST_CLK_BASE_ADDR,
+ },
+ .data = &sdio4_data,
+};
+
+static struct peri_clock sdio1_sleep_clk = {
+ .clk = {
+ .name = "sdio1_sleep_clk",
+ .parent = &kpm_ccu_clk.clk,
+ .ops = &bus_clk_ops,
+ .ccu_clk_mgr_base = KONA_MST_CLK_BASE_ADDR,
+ },
+ .data = &sdio1_sleep_data,
+};
+
+static struct peri_clock sdio2_sleep_clk = {
+ .clk = {
+ .name = "sdio2_sleep_clk",
+ .parent = &kpm_ccu_clk.clk,
+ .ops = &bus_clk_ops,
+ .ccu_clk_mgr_base = KONA_MST_CLK_BASE_ADDR,
+ },
+ .data = &sdio2_sleep_data,
+};
+
+static struct peri_clock sdio3_sleep_clk = {
+ .clk = {
+ .name = "sdio3_sleep_clk",
+ .parent = &kpm_ccu_clk.clk,
+ .ops = &bus_clk_ops,
+ .ccu_clk_mgr_base = KONA_MST_CLK_BASE_ADDR,
+ },
+ .data = &sdio3_sleep_data,
+};
+
+static struct peri_clock sdio4_sleep_clk = {
+ .clk = {
+ .name = "sdio4_sleep_clk",
+ .parent = &kpm_ccu_clk.clk,
+ .ops = &bus_clk_ops,
+ .ccu_clk_mgr_base = KONA_MST_CLK_BASE_ADDR,
+ },
+ .data = &sdio4_sleep_data,
+};
+
+/* KPS peripheral clock */
+static struct peri_clock bsc1_clk = {
+ .clk = {
+ .name = "bsc1_clk",
+ .parent = &ref_13m.clk,
+ .rate = 13 * CLOCK_1M,
+ .div = 1,
+ .ops = &peri_clk_ops,
+ .ccu_clk_mgr_base = KONA_SLV_CLK_BASE_ADDR,
+ },
+ .data = &bsc1_data,
+};
+
+static struct peri_clock bsc2_clk = {
+ .clk = {
+ .name = "bsc2_clk",
+ .parent = &ref_13m.clk,
+ .rate = 13 * CLOCK_1M,
+ .div = 1,
+ .ops = &peri_clk_ops,
+ .ccu_clk_mgr_base = KONA_SLV_CLK_BASE_ADDR,
+ },
+ .data = &bsc2_data,
+};
+
+static struct peri_clock bsc3_clk = {
+ .clk = {
+ .name = "bsc3_clk",
+ .parent = &ref_13m.clk,
+ .rate = 13 * CLOCK_1M,
+ .div = 1,
+ .ops = &peri_clk_ops,
+ .ccu_clk_mgr_base = KONA_SLV_CLK_BASE_ADDR,
+ },
+ .data = &bsc3_data,
+};
+
+/* public table for registering clocks */
+struct clk_lookup arch_clk_tbl[] = {
+ /* Peripheral clocks */
+ CLK_LK(sdio1),
+ CLK_LK(sdio2),
+ CLK_LK(sdio3),
+ CLK_LK(sdio4),
+ CLK_LK(sdio1_sleep),
+ CLK_LK(sdio2_sleep),
+ CLK_LK(sdio3_sleep),
+ CLK_LK(sdio4_sleep),
+ CLK_LK(bsc1),
+ CLK_LK(bsc2),
+ CLK_LK(bsc3),
+ /* Bus clocks */
+ CLK_LK(sdio1_ahb),
+ CLK_LK(sdio2_ahb),
+ CLK_LK(sdio3_ahb),
+ CLK_LK(sdio4_ahb),
+ CLK_LK(bsc1_apb),
+ CLK_LK(bsc2_apb),
+ CLK_LK(bsc3_apb),
+};
+
+/* public array size */
+unsigned int arch_clk_tbl_array_size = ARRAY_SIZE(arch_clk_tbl);
diff --git a/arch/arm/cpu/armv7/bcm281xx/clk-bsc.c b/arch/arm/cpu/armv7/bcm281xx/clk-bsc.c
new file mode 100644
index 0000000..ba55d0a
--- /dev/null
+++ b/arch/arm/cpu/armv7/bcm281xx/clk-bsc.c
@@ -0,0 +1,52 @@
+/*
+ * Copyright 2013 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"
+
+/* Enable appropriate clocks for a BSC/I2C port */
+int clk_bsc_enable(void *base)
+{
+ int ret;
+ char *bscstr, *apbstr;
+
+ switch ((u32) base) {
+ case PMU_BSC_BASE_ADDR:
+ /* PMU clock is always enabled */
+ return 0;
+ case BSC1_BASE_ADDR:
+ bscstr = "bsc1_clk";
+ apbstr = "bsc1_apb_clk";
+ break;
+ case BSC2_BASE_ADDR:
+ bscstr = "bsc2_clk";
+ apbstr = "bsc2_apb_clk";
+ break;
+ case BSC3_BASE_ADDR:
+ bscstr = "bsc3_clk";
+ apbstr = "bsc3_apb_clk";
+ break;
+ default:
+ printf("%s: base 0x%p not found\n", __func__, base);
+ return -EINVAL;
+ }
+
+ /* Note that the bus clock must be enabled first */
+
+ ret = clk_get_and_enable(apbstr);
+ if (ret)
+ return ret;
+
+ ret = clk_get_and_enable(bscstr);
+ if (ret)
+ return ret;
+
+ return 0;
+}
diff --git a/arch/arm/cpu/armv7/bcm281xx/clk-core.c b/arch/arm/cpu/armv7/bcm281xx/clk-core.c
new file mode 100644
index 0000000..d442583
--- /dev/null
+++ b/arch/arm/cpu/armv7/bcm281xx/clk-core.c
@@ -0,0 +1,513 @@
+/*
+ * Copyright 2013 Broadcom Corporation.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+/*
+ *
+ * bcm281xx architecture clock framework
+ *
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/errno.h>
+#include <bitfield.h>
+#include <asm/arch/sysmap.h>
+#include <asm/kona-common/clk.h>
+#include "clk-core.h"
+
+#define CLK_WR_ACCESS_PASSWORD 0x00a5a501
+#define WR_ACCESS_OFFSET 0 /* common to all clock blocks */
+#define POLICY_CTL_GO 1 /* Load and refresh policy masks */
+#define POLICY_CTL_GO_ATL 4 /* Active Load */
+
+/* Helper function */
+int clk_get_and_enable(char *clkstr)
+{
+ int ret = 0;
+ struct clk *c;
+
+ debug("%s: %s\n", __func__, clkstr);
+
+ c = clk_get(clkstr);
+ if (c) {
+ ret = clk_enable(c);
+ if (ret)
+ return ret;
+ } else {
+ printf("%s: Couldn't find %s\n", __func__, clkstr);
+ return -EINVAL;
+ }
+ return ret;
+}
+
+/*
+ * Poll a register in a CCU's address space, returning when the
+ * specified bit in that register's value is set (or clear). Delay
+ * a microsecond after each read of the register. Returns true if
+ * successful, or false if we gave up trying.
+ *
+ * Caller must ensure the CCU lock is held.
+ */
+#define CLK_GATE_DELAY_USEC 2000
+static inline int wait_bit(void *base, u32 offset, u32 bit, bool want)
+{
+ unsigned int tries;
+ u32 bit_mask = 1 << bit;
+
+ for (tries = 0; tries < CLK_GATE_DELAY_USEC; tries++) {
+ u32 val;
+ bool bit_val;
+
+ val = readl(base + offset);
+ bit_val = (val & bit_mask) ? 1 : 0;
+ if (bit_val == want)
+ return 0; /* success */
+ udelay(1);
+ }
+
+ debug("%s: timeout on addr 0x%p, waiting for bit %d to go to %d\n",
+ __func__, base + offset, bit, want);
+
+ return -ETIMEDOUT;
+}
+
+/* Enable a peripheral clock */
+static int peri_clk_enable(struct clk *c, int enable)
+{
+ int ret = 0;
+ u32 reg;
+ struct peri_clock *peri_clk = to_peri_clk(c);
+ struct peri_clk_data *cd = peri_clk->data;
+ struct bcm_clk_gate *gate = &cd->gate;
+ void *base = (void *)c->ccu_clk_mgr_base;
+
+
+ debug("%s: %s\n", __func__, c->name);
+
+ clk_get_rate(c); /* Make sure rate and sel are filled in */
+
+ /* enable access */
+ writel(CLK_WR_ACCESS_PASSWORD, base + WR_ACCESS_OFFSET);
+
+ if (enable) {
+ debug("%s %s set rate %lu div %lu sel %d parent %lu\n",
+ __func__, c->name, c->rate, c->div, c->sel,
+ c->parent->rate);
+
+ /*
+ * clkgate - only software controllable gates are
+ * supported by u-boot which includes all clocks
+ * that matter. This avoids bringing in a lot of extra
+ * complexity as done in the kernel framework.
+ */
+ if (gate_exists(gate)) {
+ reg = readl(base + cd->gate.offset);
+ reg |= (1 << cd->gate.en_bit);
+ writel(reg, base + cd->gate.offset);
+ }
+
+ /* div and pll select */
+ if (divider_exists(&cd->div)) {
+ reg = readl(base + cd->div.offset);
+ bitfield_replace(reg, cd->div.shift, cd->div.width,
+ c->div - 1);
+ writel(reg, base + cd->div.offset);
+ }
+
+ /* frequency selector */
+ if (selector_exists(&cd->sel)) {
+ reg = readl(base + cd->sel.offset);
+ bitfield_replace(reg, cd->sel.shift, cd->sel.width,
+ c->sel);
+ writel(reg, base + cd->sel.offset);
+ }
+
+ /* trigger */
+ if (trigger_exists(&cd->trig)) {
+ writel((1 << cd->trig.bit), base + cd->trig.offset);
+
+ /* wait for trigger status bit to go to 0 */
+ ret = wait_bit(base, cd->trig.offset, cd->trig.bit, 0);
+ if (ret)
+ return ret;
+ }
+
+ /* wait for running (status_bit = 1) */
+ ret = wait_bit(base, cd->gate.offset, cd->gate.status_bit, 1);
+ if (ret)
+ return ret;
+ } else {
+ debug("%s disable clock %s\n", __func__, c->name);
+
+ /* clkgate */
+ reg = readl(base + cd->gate.offset);
+ reg &= ~(1 << cd->gate.en_bit);
+ writel(reg, base + cd->gate.offset);
+
+ /* wait for stop (status_bit = 0) */
+ ret = wait_bit(base, cd->gate.offset, cd->gate.status_bit, 0);
+ }
+
+ /* disable access */
+ writel(0, base + WR_ACCESS_OFFSET);
+
+ return ret;
+}
+
+/* Set the rate of a peripheral clock */
+static int peri_clk_set_rate(struct clk *c, unsigned long rate)
+{
+ int ret = 0;
+ int i;
+ unsigned long diff;
+ unsigned long new_rate = 0, div = 1;
+ struct peri_clock *peri_clk = to_peri_clk(c);
+ struct peri_clk_data *cd = peri_clk->data;
+ const char **clock;
+
+ debug("%s: %s\n", __func__, c->name);
+ diff = rate;
+
+ i = 0;
+ for (clock = cd->clocks; *clock; clock++, i++) {
+ struct refclk *ref = refclk_str_to_clk(*clock);
+ if (!ref) {
+ printf("%s: Lookup of %s failed\n", __func__, *clock);
+ return -EINVAL;
+ }
+
+ /* round to the new rate */
+ div = ref->clk.rate / rate;
+ if (div == 0)
+ div = 1;
+
+ new_rate = ref->clk.rate / div;
+
+ /* get the min diff */
+ if (abs(new_rate - rate) < diff) {
+ diff = abs(new_rate - rate);
+ c->sel = i;
+ c->parent = &ref->clk;
+ c->rate = new_rate;
+ c->div = div;
+ }
+ }
+
+ debug("%s %s set rate %lu div %lu sel %d parent %lu\n", __func__,
+ c->name, c->rate, c->div, c->sel, c->parent->rate);
+ return ret;
+}
+
+/* Get the rate of a peripheral clock */
+static unsigned long peri_clk_get_rate(struct clk *c)
+{
+ struct peri_clock *peri_clk = to_peri_clk(c);
+ struct peri_clk_data *cd = peri_clk->data;
+ void *base = (void *)c->ccu_clk_mgr_base;
+ int div = 1;
+ const char **clock;
+ struct refclk *ref;
+ u32 reg;
+
+ debug("%s: %s\n", __func__, c->name);
+ if (selector_exists(&cd->sel)) {
+ reg = readl(base + cd->sel.offset);
+ c->sel = bitfield_extract(reg, cd->sel.shift, cd->sel.width);
+ } else {
+ /*
+ * For peri clocks that don't have a selector, the single
+ * reference clock will always exist at index 0.
+ */
+ c->sel = 0;
+ }
+
+ if (divider_exists(&cd->div)) {
+ reg = readl(base + cd->div.offset);
+ div = bitfield_extract(reg, cd->div.shift, cd->div.width);
+ div += 1;
+ }
+
+ clock = cd->clocks;
+ ref = refclk_str_to_clk(clock[c->sel]);
+ if (!ref) {
+ printf("%s: Can't lookup %s\n", __func__, clock[c->sel]);
+ return 0;
+ }
+
+ c->parent = &ref->clk;
+ c->div = div;
+ c->rate = c->parent->rate / c->div;
+ debug("%s parent rate %lu div %d sel %d rate %lu\n", __func__,
+ c->parent->rate, div, c->sel, c->rate);
+
+ return c->rate;
+}
+
+/* Peripheral clock operations */
+struct clk_ops peri_clk_ops = {
+ .enable = peri_clk_enable,
+ .set_rate = peri_clk_set_rate,
+ .get_rate = peri_clk_get_rate,
+};
+
+/* Enable a CCU clock */
+static int ccu_clk_enable(struct clk *c, int enable)
+{
+ struct ccu_clock *ccu_clk = to_ccu_clk(c);
+ void *base = (void *)c->ccu_clk_mgr_base;
+ int ret = 0;
+ u32 reg;
+
+ debug("%s: %s\n", __func__, c->name);
+ if (!enable)
+ return -EINVAL; /* CCU clock cannot shutdown */
+
+ /* enable access */
+ writel(CLK_WR_ACCESS_PASSWORD, base + WR_ACCESS_OFFSET);
+
+ /* config enable for policy engine */
+ writel(1, base + ccu_clk->lvm_en_offset);
+
+ /* wait for bit to go to 0 */
+ ret = wait_bit(base, ccu_clk->lvm_en_offset, 0, 0);
+ if (ret)
+ return ret;
+
+ /* freq ID */
+ if (!ccu_clk->freq_bit_shift)
+ ccu_clk->freq_bit_shift = 8;
+
+ /* Set frequency id for each of the 4 policies */
+ reg = ccu_clk->freq_id |
+ (ccu_clk->freq_id << (ccu_clk->freq_bit_shift)) |
+ (ccu_clk->freq_id << (ccu_clk->freq_bit_shift * 2)) |
+ (ccu_clk->freq_id << (ccu_clk->freq_bit_shift * 3));
+ writel(reg, base + ccu_clk->policy_freq_offset);
+
+ /* enable all clock mask */
+ writel(0x7fffffff, base + ccu_clk->policy0_mask_offset);
+ writel(0x7fffffff, base + ccu_clk->policy1_mask_offset);
+ writel(0x7fffffff, base + ccu_clk->policy2_mask_offset);
+ writel(0x7fffffff, base + ccu_clk->policy3_mask_offset);
+
+ if (ccu_clk->num_policy_masks == 2) {
+ writel(0x7fffffff, base + ccu_clk->policy0_mask2_offset);
+ writel(0x7fffffff, base + ccu_clk->policy1_mask2_offset);
+ writel(0x7fffffff, base + ccu_clk->policy2_mask2_offset);
+ writel(0x7fffffff, base + ccu_clk->policy3_mask2_offset);
+ }
+
+ /* start policy engine */
+ reg = readl(base + ccu_clk->policy_ctl_offset);
+ reg |= (POLICY_CTL_GO + POLICY_CTL_GO_ATL);
+ writel(reg, base + ccu_clk->policy_ctl_offset);
+
+ /* wait till started */
+ ret = wait_bit(base, ccu_clk->policy_ctl_offset, 0, 0);
+ if (ret)
+ return ret;
+
+ /* disable access */
+ writel(0, base + WR_ACCESS_OFFSET);
+
+ return ret;
+}
+
+/* Get the CCU clock rate */
+static unsigned long ccu_clk_get_rate(struct clk *c)
+{
+ struct ccu_clock *ccu_clk = to_ccu_clk(c);
+ debug("%s: %s\n", __func__, c->name);
+ c->rate = ccu_clk->freq_tbl[ccu_clk->freq_id];
+ return c->rate;
+}
+
+/* CCU clock operations */
+struct clk_ops ccu_clk_ops = {
+ .enable = ccu_clk_enable,
+ .get_rate = ccu_clk_get_rate,
+};
+
+/* Enable a bus clock */
+static int bus_clk_enable(struct clk *c, int enable)
+{
+ struct bus_clock *bus_clk = to_bus_clk(c);
+ struct bus_clk_data *cd = bus_clk->data;
+ void *base = (void *)c->ccu_clk_mgr_base;
+ int ret = 0;
+ u32 reg;
+
+ debug("%s: %s\n", __func__, c->name);
+ /* enable access */
+ writel(CLK_WR_ACCESS_PASSWORD, base + WR_ACCESS_OFFSET);
+
+ /* enable gating */
+ reg = readl(base + cd->gate.offset);
+ if (!!(reg & (1 << cd->gate.status_bit)) == !!enable)
+ debug("%s already %s\n", c->name,
+ enable ? "enabled" : "disabled");
+ else {
+ int want = (enable) ? 1 : 0;
+ reg |= (1 << cd->gate.hw_sw_sel_bit);
+
+ if (enable)
+ reg |= (1 << cd->gate.en_bit);
+ else
+ reg &= ~(1 << cd->gate.en_bit);
+
+ writel(reg, base + cd->gate.offset);
+ ret = wait_bit(base, cd->gate.offset, cd->gate.status_bit,
+ want);
+ if (ret)
+ return ret;
+ }
+
+ /* disable access */
+ writel(0, base + WR_ACCESS_OFFSET);
+
+ return ret;
+}
+
+/* Get the rate of a bus clock */
+static unsigned long bus_clk_get_rate(struct clk *c)
+{
+ struct bus_clock *bus_clk = to_bus_clk(c);
+ struct ccu_clock *ccu_clk;
+
+ debug("%s: %s\n", __func__, c->name);
+ ccu_clk = to_ccu_clk(c->parent);
+
+ c->rate = bus_clk->freq_tbl[ccu_clk->freq_id];
+ c->div = ccu_clk->freq_tbl[ccu_clk->freq_id] / c->rate;
+ return c->rate;
+}
+
+/* Bus clock operations */
+struct clk_ops bus_clk_ops = {
+ .enable = bus_clk_enable,
+ .get_rate = bus_clk_get_rate,
+};
+
+/* Enable a reference clock */
+static int ref_clk_enable(struct clk *c, int enable)
+{
+ debug("%s: %s\n", __func__, c->name);
+ return 0;
+}
+
+/* Reference clock operations */
+struct clk_ops ref_clk_ops = {
+ .enable = ref_clk_enable,
+};
+
+/*
+ * clk.h implementation follows
+ */
+
+/* Initialize the clock framework */
+int clk_init(void)
+{
+ debug("%s:\n", __func__);
+ return 0;
+}
+
+/* Get a clock handle, give a name string */
+struct clk *clk_get(const char *con_id)
+{
+ int i;
+ struct clk_lookup *clk_tblp;
+
+ debug("%s: %s\n", __func__, con_id);
+
+ clk_tblp = arch_clk_tbl;
+ for (i = 0; i < arch_clk_tbl_array_size; i++, clk_tblp++) {
+ if (clk_tblp->con_id) {
+ if (!con_id || strcmp(clk_tblp->con_id, con_id))
+ continue;
+ return clk_tblp->clk;
+ }
+ }
+ return NULL;
+}
+
+/* Enable a clock */
+int clk_enable(struct clk *c)
+{
+ int ret = 0;
+
+ debug("%s: %s\n", __func__, c->name);
+ if (!c->ops || !c->ops->enable)
+ return -1;
+
+ /* enable parent clock first */
+ if (c->parent)
+ ret = clk_enable(c->parent);
+
+ if (ret)
+ return ret;
+
+ if (!c->use_cnt) {
+ c->use_cnt++;
+ ret = c->ops->enable(c, 1);
+ }
+
+ return ret;
+}
+
+/* Disable a clock */
+void clk_disable(struct clk *c)
+{
+ debug("%s: %s\n", __func__, c->name);
+ if (!c->ops || !c->ops->enable)
+ return;
+
+ if (c->use_cnt) {
+ c->use_cnt--;
+ c->ops->enable(c, 0);
+ }
+
+ /* disable parent */
+ if (c->parent)
+ clk_disable(c->parent);
+}
+
+/* Get the clock rate */
+unsigned long clk_get_rate(struct clk *c)
+{
+ unsigned long rate;
+
+ debug("%s: %s\n", __func__, c->name);
+ if (!c || !c->ops || !c->ops->get_rate)
+ return 0;
+
+ rate = c->ops->get_rate(c);
+ debug("%s: rate = %ld\n", __func__, rate);
+ return rate;
+}
+
+/* Set the clock rate */
+int clk_set_rate(struct clk *c, unsigned long rate)
+{
+ int ret;
+
+ debug("%s: %s rate=%ld\n", __func__, c->name, rate);
+ if (!c || !c->ops || !c->ops->set_rate)
+ return -EINVAL;
+
+ if (c->use_cnt)
+ return -EINVAL;
+
+ ret = c->ops->set_rate(c, rate);
+
+ return ret;
+}
+
+/* Not required for this arch */
+/*
+long clk_round_rate(struct clk *clk, unsigned long rate);
+int clk_set_parent(struct clk *clk, struct clk *parent);
+struct clk *clk_get_parent(struct clk *clk);
+*/
diff --git a/arch/arm/cpu/armv7/bcm281xx/clk-core.h b/arch/arm/cpu/armv7/bcm281xx/clk-core.h
new file mode 100644
index 0000000..882a297
--- /dev/null
+++ b/arch/arm/cpu/armv7/bcm281xx/clk-core.h
@@ -0,0 +1,495 @@
+/*
+ * Copyright 2013 Broadcom Corporation.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <linux/stddef.h>
+
+#ifdef CONFIG_CLK_DEBUG
+#undef writel
+#undef readl
+static inline void writel(u32 val, void *addr)
+{
+ printf("Write [0x%p] = 0x%08x\n", addr, val);
+ *(u32 *)addr = val;
+}
+
+static inline u32 readl(void *addr)
+{
+ u32 val = *(u32 *)addr;
+ printf("Read [0x%p] = 0x%08x\n", addr, val);
+ return val;
+}
+#endif
+
+struct clk;
+
+struct clk_lookup {
+ const char *dev_id;
+ const char *con_id;
+ struct clk *clk;
+};
+
+extern struct clk_lookup arch_clk_tbl[];
+extern unsigned int arch_clk_tbl_array_size;
+
+/**
+ * struct clk_ops - standard clock operations
+ * @enable: enable/disable clock, see clk_enable() and clk_disable()
+ * @set_rate: set the clock rate, see clk_set_rate().
+ * @get_rate: get the clock rate, see clk_get_rate().
+ * @round_rate: round a given clock rate, see clk_round_rate().
+ * @set_parent: set the clock's parent, see clk_set_parent().
+ *
+ * Group the common clock implementations together so that we
+ * don't have to keep setting the same fiels again. We leave
+ * enable in struct clk.
+ *
+ */
+struct clk_ops {
+ int (*enable) (struct clk *c, int enable);
+ int (*set_rate) (struct clk *c, unsigned long rate);
+ unsigned long (*get_rate) (struct clk *c);
+ unsigned long (*round_rate) (struct clk *c, unsigned long rate);
+ int (*set_parent) (struct clk *c, struct clk *parent);
+};
+
+struct clk {
+ struct clk *parent;
+ const char *name;
+ int use_cnt;
+ unsigned long rate; /* in HZ */
+
+ /* programmable divider. 0 means fixed ratio to parent clock */
+ unsigned long div;
+
+ struct clk_src *src;
+ struct clk_ops *ops;
+
+ unsigned long ccu_clk_mgr_base;
+ int sel;
+};
+
+struct refclk *refclk_str_to_clk(const char *name);
+
+#define U8_MAX ((u8)~0U)
+#define U32_MAX ((u32)~0U)
+#define U64_MAX ((u64)~0U)
+
+/* The common clock framework uses u8 to represent a parent index */
+#define PARENT_COUNT_MAX ((u32)U8_MAX)
+
+#define BAD_CLK_INDEX U8_MAX /* Can't ever be valid */
+#define BAD_CLK_NAME ((const char *)-1)
+
+#define BAD_SCALED_DIV_VALUE U64_MAX
+
+/*
+ * Utility macros for object flag management. If possible, flags
+ * should be defined such that 0 is the desired default value.
+ */
+#define FLAG(type, flag) BCM_CLK_ ## type ## _FLAGS_ ## flag
+#define FLAG_SET(obj, type, flag) ((obj)->flags |= FLAG(type, flag))
+#define FLAG_CLEAR(obj, type, flag) ((obj)->flags &= ~(FLAG(type, flag)))
+#define FLAG_FLIP(obj, type, flag) ((obj)->flags ^= FLAG(type, flag))
+#define FLAG_TEST(obj, type, flag) (!!((obj)->flags & FLAG(type, flag)))
+
+/* Clock field state tests */
+
+#define gate_exists(gate) FLAG_TEST(gate, GATE, EXISTS)
+#define gate_is_enabled(gate) FLAG_TEST(gate, GATE, ENABLED)
+#define gate_is_hw_controllable(gate) FLAG_TEST(gate, GATE, HW)
+#define gate_is_sw_controllable(gate) FLAG_TEST(gate, GATE, SW)
+#define gate_is_sw_managed(gate) FLAG_TEST(gate, GATE, SW_MANAGED)
+#define gate_is_no_disable(gate) FLAG_TEST(gate, GATE, NO_DISABLE)
+
+#define gate_flip_enabled(gate) FLAG_FLIP(gate, GATE, ENABLED)
+
+#define divider_exists(div) FLAG_TEST(div, DIV, EXISTS)
+#define divider_is_fixed(div) FLAG_TEST(div, DIV, FIXED)
+#define divider_has_fraction(div) (!divider_is_fixed(div) && \
+ (div)->frac_width > 0)
+
+#define selector_exists(sel) ((sel)->width != 0)
+#define trigger_exists(trig) FLAG_TEST(trig, TRIG, EXISTS)
+
+/* Clock type, used to tell common block what it's part of */
+enum bcm_clk_type {
+ bcm_clk_none, /* undefined clock type */
+ bcm_clk_bus,
+ bcm_clk_core,
+ bcm_clk_peri
+};
+
+/*
+ * Gating control and status is managed by a 32-bit gate register.
+ *
+ * There are several types of gating available:
+ * - (no gate)
+ * A clock with no gate is assumed to be always enabled.
+ * - hardware-only gating (auto-gating)
+ * Enabling or disabling clocks with this type of gate is
+ * managed automatically by the hardware. Such clocks can be
+ * considered by the software to be enabled. The current status
+ * of auto-gated clocks can be read from the gate status bit.
+ * - software-only gating
+ * Auto-gating is not available for this type of clock.
+ * Instead, software manages whether it's enabled by setting or
+ * clearing the enable bit. The current gate status of a gate
+ * under software control can be read from the gate status bit.
+ * To ensure a change to the gating status is complete, the
+ * status bit can be polled to verify that the gate has entered
+ * the desired state.
+ * - selectable hardware or software gating
+ * Gating for this type of clock can be configured to be either
+ * under software or hardware control. Which type is in use is
+ * determined by the hw_sw_sel bit of the gate register.
+ */
+struct bcm_clk_gate {
+ u32 offset; /* gate register offset */
+ u32 status_bit; /* 0: gate is disabled; 0: gatge is enabled */
+ u32 en_bit; /* 0: disable; 1: enable */
+ u32 hw_sw_sel_bit; /* 0: hardware gating; 1: software gating */
+ u32 flags; /* BCM_CLK_GATE_FLAGS_* below */
+};
+
+/*
+ * Gate flags:
+ * HW means this gate can be auto-gated
+ * SW means the state of this gate can be software controlled
+ * NO_DISABLE means this gate is (only) enabled if under software control
+ * SW_MANAGED means the status of this gate is under software control
+ * ENABLED means this software-managed gate is *supposed* to be enabled
+ */
+#define BCM_CLK_GATE_FLAGS_EXISTS ((u32)1 << 0) /* Gate is valid */
+#define BCM_CLK_GATE_FLAGS_HW ((u32)1 << 1) /* Can auto-gate */
+#define BCM_CLK_GATE_FLAGS_SW ((u32)1 << 2) /* Software control */
+#define BCM_CLK_GATE_FLAGS_NO_DISABLE ((u32)1 << 3) /* HW or enabled */
+#define BCM_CLK_GATE_FLAGS_SW_MANAGED ((u32)1 << 4) /* SW now in control */
+#define BCM_CLK_GATE_FLAGS_ENABLED ((u32)1 << 5) /* If SW_MANAGED */
+
+/*
+ * Gate initialization macros.
+ *
+ * Any gate initially under software control will be enabled.
+ */
+
+/* A hardware/software gate initially under software control */
+#define HW_SW_GATE(_offset, _status_bit, _en_bit, _hw_sw_sel_bit) \
+ { \
+ .offset = (_offset), \
+ .status_bit = (_status_bit), \
+ .en_bit = (_en_bit), \
+ .hw_sw_sel_bit = (_hw_sw_sel_bit), \
+ .flags = FLAG(GATE, HW)|FLAG(GATE, SW)| \
+ FLAG(GATE, SW_MANAGED)|FLAG(GATE, ENABLED)| \
+ FLAG(GATE, EXISTS), \
+ }
+
+/* A hardware/software gate initially under hardware control */
+#define HW_SW_GATE_AUTO(_offset, _status_bit, _en_bit, _hw_sw_sel_bit) \
+ { \
+ .offset = (_offset), \
+ .status_bit = (_status_bit), \
+ .en_bit = (_en_bit), \
+ .hw_sw_sel_bit = (_hw_sw_sel_bit), \
+ .flags = FLAG(GATE, HW)|FLAG(GATE, SW)| \
+ FLAG(GATE, EXISTS), \
+ }
+
+/* A hardware-or-enabled gate (enabled if not under hardware control) */
+#define HW_ENABLE_GATE(_offset, _status_bit, _en_bit, _hw_sw_sel_bit) \
+ { \
+ .offset = (_offset), \
+ .status_bit = (_status_bit), \
+ .en_bit = (_en_bit), \
+ .hw_sw_sel_bit = (_hw_sw_sel_bit), \
+ .flags = FLAG(GATE, HW)|FLAG(GATE, SW)| \
+ FLAG(GATE, NO_DISABLE)|FLAG(GATE, EXISTS), \
+ }
+
+/* A software-only gate */
+#define SW_ONLY_GATE(_offset, _status_bit, _en_bit) \
+ { \
+ .offset = (_offset), \
+ .status_bit = (_status_bit), \
+ .en_bit = (_en_bit), \
+ .flags = FLAG(GATE, SW)|FLAG(GATE, SW_MANAGED)| \
+ FLAG(GATE, ENABLED)|FLAG(GATE, EXISTS), \
+ }
+
+/* A hardware-only gate */
+#define HW_ONLY_GATE(_offset, _status_bit) \
+ { \
+ .offset = (_offset), \
+ .status_bit = (_status_bit), \
+ .flags = FLAG(GATE, HW)|FLAG(GATE, EXISTS), \
+ }
+
+/*
+ * Each clock can have zero, one, or two dividers which change the
+ * output rate of the clock. Each divider can be either fixed or
+ * variable. If there are two dividers, they are the "pre-divider"
+ * and the "regular" or "downstream" divider. If there is only one,
+ * there is no pre-divider.
+ *
+ * A fixed divider is any non-zero (positive) value, and it
+ * indicates how the input rate is affected by the divider.
+ *
+ * The value of a variable divider is maintained in a sub-field of a
+ * 32-bit divider register. The position of the field in the
+ * register is defined by its offset and width. The value recorded
+ * in this field is always 1 less than the value it represents.
+ *
+ * In addition, a variable divider can indicate that some subset
+ * of its bits represent a "fractional" part of the divider. Such
+ * bits comprise the low-order portion of the divider field, and can
+ * be viewed as representing the portion of the divider that lies to
+ * the right of the decimal point. Most variable dividers have zero
+ * fractional bits. Variable dividers with non-zero fraction width
+ * still record a value 1 less than the value they represent; the
+ * added 1 does *not* affect the low-order bit in this case, it
+ * affects the bits above the fractional part only. (Often in this
+ * code a divider field value is distinguished from the value it
+ * represents by referring to the latter as a "divisor".)
+ *
+ * In order to avoid dealing with fractions, divider arithmetic is
+ * performed using "scaled" values. A scaled value is one that's
+ * been left-shifted by the fractional width of a divider. Dividing
+ * a scaled value by a scaled divisor produces the desired quotient
+ * without loss of precision and without any other special handling
+ * for fractions.
+ *
+ * The recorded value of a variable divider can be modified. To
+ * modify either divider (or both), a clock must be enabled (i.e.,
+ * using its gate). In addition, a trigger register (described
+ * below) must be used to commit the change, and polled to verify
+ * the change is complete.
+ */
+struct bcm_clk_div {
+ union {
+ struct { /* variable divider */
+ u32 offset; /* divider register offset */
+ u32 shift; /* field shift */
+ u32 width; /* field width */
+ u32 frac_width; /* field fraction width */
+
+ u64 scaled_div; /* scaled divider value */
+ };
+ u32 fixed; /* non-zero fixed divider value */
+ };
+ u32 flags; /* BCM_CLK_DIV_FLAGS_* below */
+};
+
+/*
+ * Divider flags:
+ * EXISTS means this divider exists
+ * FIXED means it is a fixed-rate divider
+ */
+#define BCM_CLK_DIV_FLAGS_EXISTS ((u32)1 << 0) /* Divider is valid */
+#define BCM_CLK_DIV_FLAGS_FIXED ((u32)1 << 1) /* Fixed-value */
+
+/* Divider initialization macros */
+
+/* A fixed (non-zero) divider */
+#define FIXED_DIVIDER(_value) \
+ { \
+ .fixed = (_value), \
+ .flags = FLAG(DIV, EXISTS)|FLAG(DIV, FIXED), \
+ }
+
+/* A divider with an integral divisor */
+#define DIVIDER(_offset, _shift, _width) \
+ { \
+ .offset = (_offset), \
+ .shift = (_shift), \
+ .width = (_width), \
+ .scaled_div = BAD_SCALED_DIV_VALUE, \
+ .flags = FLAG(DIV, EXISTS), \
+ }
+
+/* A divider whose divisor has an integer and fractional part */
+#define FRAC_DIVIDER(_offset, _shift, _width, _frac_width) \
+ { \
+ .offset = (_offset), \
+ .shift = (_shift), \
+ .width = (_width), \
+ .frac_width = (_frac_width), \
+ .scaled_div = BAD_SCALED_DIV_VALUE, \
+ .flags = FLAG(DIV, EXISTS), \
+ }
+
+/*
+ * Clocks may have multiple "parent" clocks. If there is more than
+ * one, a selector must be specified to define which of the parent
+ * clocks is currently in use. The selected clock is indicated in a
+ * sub-field of a 32-bit selector register. The range of
+ * representable selector values typically exceeds the number of
+ * available parent clocks. Occasionally the reset value of a
+ * selector field is explicitly set to a (specific) value that does
+ * not correspond to a defined input clock.
+ *
+ * We register all known parent clocks with the common clock code
+ * using a packed array (i.e., no empty slots) of (parent) clock
+ * names, and refer to them later using indexes into that array.
+ * We maintain an array of selector values indexed by common clock
+ * index values in order to map between these common clock indexes
+ * and the selector values used by the hardware.
+ *
+ * Like dividers, a selector can be modified, but to do so a clock
+ * must be enabled, and a trigger must be used to commit the change.
+ */
+struct bcm_clk_sel {
+ u32 offset; /* selector register offset */
+ u32 shift; /* field shift */
+ u32 width; /* field width */
+
+ u32 parent_count; /* number of entries in parent_sel[] */
+ u32 *parent_sel; /* array of parent selector values */
+ u8 clk_index; /* current selected index in parent_sel[] */
+};
+
+/* Selector initialization macro */
+#define SELECTOR(_offset, _shift, _width) \
+ { \
+ .offset = (_offset), \
+ .shift = (_shift), \
+ .width = (_width), \
+ .clk_index = BAD_CLK_INDEX, \
+ }
+
+/*
+ * Making changes to a variable divider or a selector for a clock
+ * requires the use of a trigger. A trigger is defined by a single
+ * bit within a register. To signal a change, a 1 is written into
+ * that bit. To determine when the change has been completed, that
+ * trigger bit is polled; the read value will be 1 while the change
+ * is in progress, and 0 when it is complete.
+ *
+ * Occasionally a clock will have more than one trigger. In this
+ * case, the "pre-trigger" will be used when changing a clock's
+ * selector and/or its pre-divider.
+ */
+struct bcm_clk_trig {
+ u32 offset; /* trigger register offset */
+ u32 bit; /* trigger bit */
+ u32 flags; /* BCM_CLK_TRIG_FLAGS_* below */
+};
+
+/*
+ * Trigger flags:
+ * EXISTS means this trigger exists
+ */
+#define BCM_CLK_TRIG_FLAGS_EXISTS ((u32)1 << 0) /* Trigger is valid */
+
+/* Trigger initialization macro */
+#define TRIGGER(_offset, _bit) \
+ { \
+ .offset = (_offset), \
+ .bit = (_bit), \
+ .flags = FLAG(TRIG, EXISTS), \
+ }
+
+struct bus_clk_data {
+ struct bcm_clk_gate gate;
+};
+
+struct core_clk_data {
+ struct bcm_clk_gate gate;
+};
+
+struct peri_clk_data {
+ struct bcm_clk_gate gate;
+ struct bcm_clk_trig pre_trig;
+ struct bcm_clk_div pre_div;
+ struct bcm_clk_trig trig;
+ struct bcm_clk_div div;
+ struct bcm_clk_sel sel;
+ const char *clocks[]; /* must be last; use CLOCKS() to declare */
+};
+#define CLOCKS(...) { __VA_ARGS__, NULL, }
+#define NO_CLOCKS { NULL, } /* Must use of no parent clocks */
+
+struct refclk {
+ struct clk clk;
+};
+
+struct peri_clock {
+ struct clk clk;
+ struct peri_clk_data *data;
+};
+
+struct ccu_clock {
+ struct clk clk;
+
+ int num_policy_masks;
+ unsigned long policy_freq_offset;
+ int freq_bit_shift; /* 8 for most CCUs */
+ unsigned long policy_ctl_offset;
+ unsigned long policy0_mask_offset;
+ unsigned long policy1_mask_offset;
+ unsigned long policy2_mask_offset;
+ unsigned long policy3_mask_offset;
+ unsigned long policy0_mask2_offset;
+ unsigned long policy1_mask2_offset;
+ unsigned long policy2_mask2_offset;
+ unsigned long policy3_mask2_offset;
+ unsigned long lvm_en_offset;
+
+ int freq_id;
+ unsigned long *freq_tbl;
+};
+
+struct bus_clock {
+ struct clk clk;
+ struct bus_clk_data *data;
+ unsigned long *freq_tbl;
+};
+
+struct ref_clock {
+ struct clk clk;
+};
+
+static inline int is_same_clock(struct clk *a, struct clk *b)
+{
+ return (a == b);
+}
+
+#define to_clk(p) (&((p)->clk))
+#define name_to_clk(name) (&((name##_clk).clk))
+/* declare a struct clk_lookup */
+#define CLK_LK(name) \
+{.con_id = __stringify(name##_clk), .clk = name_to_clk(name),}
+
+static inline struct refclk *to_refclk(struct clk *clock)
+{
+ return container_of(clock, struct refclk, clk);
+}
+
+static inline struct peri_clock *to_peri_clk(struct clk *clock)
+{
+ return container_of(clock, struct peri_clock, clk);
+}
+
+static inline struct ccu_clock *to_ccu_clk(struct clk *clock)
+{
+ return container_of(clock, struct ccu_clock, clk);
+}
+
+static inline struct bus_clock *to_bus_clk(struct clk *clock)
+{
+ return container_of(clock, struct bus_clock, clk);
+}
+
+static inline struct ref_clock *to_ref_clk(struct clk *clock)
+{
+ return container_of(clock, struct ref_clock, clk);
+}
+
+extern struct clk_ops peri_clk_ops;
+extern struct clk_ops ccu_clk_ops;
+extern struct clk_ops bus_clk_ops;
+extern struct clk_ops ref_clk_ops;
+
+extern int clk_get_and_enable(char *clkstr);
diff --git a/arch/arm/cpu/armv7/bcm281xx/clk-sdio.c b/arch/arm/cpu/armv7/bcm281xx/clk-sdio.c
new file mode 100644
index 0000000..49badcb
--- /dev/null
+++ b/arch/arm/cpu/armv7/bcm281xx/clk-sdio.c
@@ -0,0 +1,73 @@
+/*
+ * Copyright 2013 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"
+
+/* Enable appropriate clocks for an SDIO port */
+int clk_sdio_enable(void *base, u32 rate, u32 *actual_ratep)
+{
+ int ret;
+ struct clk *c;
+
+ char *clkstr;
+ char *slpstr;
+ char *ahbstr;
+
+ switch ((u32) base) {
+ case CONFIG_SYS_SDIO_BASE0:
+ clkstr = CONFIG_SYS_SDIO0 "_clk";
+ ahbstr = CONFIG_SYS_SDIO0 "_ahb_clk";
+ slpstr = CONFIG_SYS_SDIO0 "_sleep_clk";
+ break;
+ case CONFIG_SYS_SDIO_BASE1:
+ clkstr = CONFIG_SYS_SDIO1 "_clk";
+ ahbstr = CONFIG_SYS_SDIO1 "_ahb_clk";
+ slpstr = CONFIG_SYS_SDIO1 "_sleep_clk";
+ break;
+ case CONFIG_SYS_SDIO_BASE2:
+ clkstr = CONFIG_SYS_SDIO2 "_clk";
+ ahbstr = CONFIG_SYS_SDIO2 "_ahb_clk";
+ slpstr = CONFIG_SYS_SDIO2 "_sleep_clk";
+ break;
+ case CONFIG_SYS_SDIO_BASE3:
+ clkstr = CONFIG_SYS_SDIO3 "_clk";
+ ahbstr = CONFIG_SYS_SDIO3 "_ahb_clk";
+ slpstr = CONFIG_SYS_SDIO3 "_sleep_clk";
+ break;
+ default:
+ printf("%s: base 0x%p not found\n", __func__, base);
+ return -EINVAL;
+ }
+
+ ret = clk_get_and_enable(ahbstr);
+ if (ret)
+ return ret;
+
+ ret = clk_get_and_enable(slpstr);
+ if (ret)
+ return ret;
+
+ c = clk_get(clkstr);
+ if (c) {
+ ret = clk_set_rate(c, rate);
+ if (ret)
+ return ret;
+
+ ret = clk_enable(c);
+ if (ret)
+ return ret;
+ } else {
+ printf("%s: Couldn't find %s\n", __func__, clkstr);
+ return -EINVAL;
+ }
+ *actual_ratep = rate;
+ return 0;
+}
diff --git a/arch/arm/cpu/armv7/bcm281xx/reset.c b/arch/arm/cpu/armv7/bcm281xx/reset.c
new file mode 100644
index 0000000..3beb0ed
--- /dev/null
+++ b/arch/arm/cpu/armv7/bcm281xx/reset.c
@@ -0,0 +1,27 @@
+/*
+ * Copyright 2013 Broadcom Corporation.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/sysmap.h>
+
+#define EN_MASK 0x08000000 /* Enable timer */
+#define SRSTEN_MASK 0x04000000 /* Enable soft reset */
+#define CLKS_SHIFT 20 /* Clock period shift */
+#define LD_SHIFT 0 /* Reload value shift */
+
+void reset_cpu(ulong ignored)
+{
+ /*
+ * Set WD enable, RST enable,
+ * 3.9 msec clock period (8), reload value (8*3.9ms)
+ */
+ u32 reg = EN_MASK + SRSTEN_MASK + (8 << CLKS_SHIFT) + (8 << LD_SHIFT);
+ writel(reg, SECWD2_BASE_ADDR);
+
+ while (1)
+ ; /* loop forever till reset */
+}
generated by cgit v1.1 at 2024-11-10 04:26:26 +0000