1 files changed, 579 insertions, 0 deletions

diff --git a/arch/mips/bcm63xx/clk.c b/arch/mips/bcm63xx/clk.c
new file mode 100644
index 000000000..f183c4550
--- /dev/null
+++ b/arch/mips/bcm63xx/clk.c
@@ -0,0 +1,579 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr>
+ */
+
+#include <linux/init.h>
+#include <linux/export.h>
+#include <linux/mutex.h>
+#include <linux/err.h>
+#include <linux/clk.h>
+#include <linux/clkdev.h>
+#include <linux/delay.h>
+#include <bcm63xx_cpu.h>
+#include <bcm63xx_io.h>
+#include <bcm63xx_regs.h>
+#include <bcm63xx_reset.h>
+
+struct clk {
+        void            (*set)(struct clk *, int);
+        unsigned int    rate;
+        unsigned int    usage;
+        int             id;
+};
+
+static DEFINE_MUTEX(clocks_mutex);
+
+
+static void clk_enable_unlocked(struct clk *clk)
+{
+        if (clk->set && (clk->usage++) == 0)
+                clk->set(clk, 1);
+}
+
+static void clk_disable_unlocked(struct clk *clk)
+{
+        if (clk->set && (--clk->usage) == 0)
+                clk->set(clk, 0);
+}
+
+static void bcm_hwclock_set(u32 mask, int enable)
+{
+        u32 reg;
+
+        reg = bcm_perf_readl(PERF_CKCTL_REG);
+        if (enable)
+                reg |= mask;
+        else
+                reg &= ~mask;
+        bcm_perf_writel(reg, PERF_CKCTL_REG);
+}
+
+/*
+ * Ethernet MAC "misc" clock: dma clocks and main clock on 6348
+ */
+static void enet_misc_set(struct clk *clk, int enable)
+{
+        u32 mask;
+
+        if (BCMCPU_IS_6338())
+                mask = CKCTL_6338_ENET_EN;
+        else if (BCMCPU_IS_6345())
+                mask = CKCTL_6345_ENET_EN;
+        else if (BCMCPU_IS_6348())
+                mask = CKCTL_6348_ENET_EN;
+        else
+                /* BCMCPU_IS_6358 */
+                mask = CKCTL_6358_EMUSB_EN;
+        bcm_hwclock_set(mask, enable);
+}
+
+static struct clk clk_enet_misc = {
+        .set    = enet_misc_set,
+};
+
+/*
+ * Ethernet MAC clocks: only revelant on 6358, silently enable misc
+ * clocks
+ */
+static void enetx_set(struct clk *clk, int enable)
+{
+        if (enable)
+                clk_enable_unlocked(&clk_enet_misc);
+        else
+                clk_disable_unlocked(&clk_enet_misc);
+
+        if (BCMCPU_IS_3368() || BCMCPU_IS_6358()) {
+                u32 mask;
+
+                if (clk->id == 0)
+                        mask = CKCTL_6358_ENET0_EN;
+                else
+                        mask = CKCTL_6358_ENET1_EN;
+                bcm_hwclock_set(mask, enable);
+        }
+}
+
+static struct clk clk_enet0 = {
+        .id     = 0,
+        .set    = enetx_set,
+};
+
+static struct clk clk_enet1 = {
+        .id     = 1,
+        .set    = enetx_set,
+};
+
+/*
+ * Ethernet PHY clock
+ */
+static void ephy_set(struct clk *clk, int enable)
+{
+        if (BCMCPU_IS_3368() || BCMCPU_IS_6358())
+                bcm_hwclock_set(CKCTL_6358_EPHY_EN, enable);
+}
+
+
+static struct clk clk_ephy = {
+        .set    = ephy_set,
+};
+
+/*
+ * Ethernet switch SAR clock
+ */
+static void swpkt_sar_set(struct clk *clk, int enable)
+{
+        if (BCMCPU_IS_6368())
+                bcm_hwclock_set(CKCTL_6368_SWPKT_SAR_EN, enable);
+        else
+                return;
+}
+
+static struct clk clk_swpkt_sar = {
+        .set    = swpkt_sar_set,
+};
+
+/*
+ * Ethernet switch USB clock
+ */
+static void swpkt_usb_set(struct clk *clk, int enable)
+{
+        if (BCMCPU_IS_6368())
+                bcm_hwclock_set(CKCTL_6368_SWPKT_USB_EN, enable);
+        else
+                return;
+}
+
+static struct clk clk_swpkt_usb = {
+        .set    = swpkt_usb_set,
+};
+
+/*
+ * Ethernet switch clock
+ */
+static void enetsw_set(struct clk *clk, int enable)
+{
+        if (BCMCPU_IS_6328()) {
+                bcm_hwclock_set(CKCTL_6328_ROBOSW_EN, enable);
+        } else if (BCMCPU_IS_6362()) {
+                bcm_hwclock_set(CKCTL_6362_ROBOSW_EN, enable);
+        } else if (BCMCPU_IS_6368()) {
+                if (enable) {
+                        clk_enable_unlocked(&clk_swpkt_sar);
+                        clk_enable_unlocked(&clk_swpkt_usb);
+                } else {
+                        clk_disable_unlocked(&clk_swpkt_usb);
+                        clk_disable_unlocked(&clk_swpkt_sar);
+                }
+                bcm_hwclock_set(CKCTL_6368_ROBOSW_EN, enable);
+        } else {
+                return;
+        }
+
+        if (enable) {
+                /* reset switch core afer clock change */
+                bcm63xx_core_set_reset(BCM63XX_RESET_ENETSW, 1);
+                msleep(10);
+                bcm63xx_core_set_reset(BCM63XX_RESET_ENETSW, 0);
+                msleep(10);
+        }
+}
+
+static struct clk clk_enetsw = {
+        .set    = enetsw_set,
+};
+
+/*
+ * PCM clock
+ */
+static void pcm_set(struct clk *clk, int enable)
+{
+        if (BCMCPU_IS_3368())
+                bcm_hwclock_set(CKCTL_3368_PCM_EN, enable);
+        if (BCMCPU_IS_6358())
+                bcm_hwclock_set(CKCTL_6358_PCM_EN, enable);
+}
+
+static struct clk clk_pcm = {
+        .set    = pcm_set,
+};
+
+/*
+ * USB host clock
+ */
+static void usbh_set(struct clk *clk, int enable)
+{
+        if (BCMCPU_IS_6328())
+                bcm_hwclock_set(CKCTL_6328_USBH_EN, enable);
+        else if (BCMCPU_IS_6348())
+                bcm_hwclock_set(CKCTL_6348_USBH_EN, enable);
+        else if (BCMCPU_IS_6362())
+                bcm_hwclock_set(CKCTL_6362_USBH_EN, enable);
+        else if (BCMCPU_IS_6368())
+                bcm_hwclock_set(CKCTL_6368_USBH_EN, enable);
+}
+
+static struct clk clk_usbh = {
+        .set    = usbh_set,
+};
+
+/*
+ * USB device clock
+ */
+static void usbd_set(struct clk *clk, int enable)
+{
+        if (BCMCPU_IS_6328())
+                bcm_hwclock_set(CKCTL_6328_USBD_EN, enable);
+        else if (BCMCPU_IS_6362())
+                bcm_hwclock_set(CKCTL_6362_USBD_EN, enable);
+        else if (BCMCPU_IS_6368())
+                bcm_hwclock_set(CKCTL_6368_USBD_EN, enable);
+}
+
+static struct clk clk_usbd = {
+        .set    = usbd_set,
+};
+
+/*
+ * SPI clock
+ */
+static void spi_set(struct clk *clk, int enable)
+{
+        u32 mask;
+
+        if (BCMCPU_IS_6338())
+                mask = CKCTL_6338_SPI_EN;
+        else if (BCMCPU_IS_6348())
+                mask = CKCTL_6348_SPI_EN;
+        else if (BCMCPU_IS_3368() || BCMCPU_IS_6358())
+                mask = CKCTL_6358_SPI_EN;
+        else if (BCMCPU_IS_6362())
+                mask = CKCTL_6362_SPI_EN;
+        else
+                /* BCMCPU_IS_6368 */
+                mask = CKCTL_6368_SPI_EN;
+        bcm_hwclock_set(mask, enable);
+}
+
+static struct clk clk_spi = {
+        .set    = spi_set,
+};
+
+/*
+ * HSSPI clock
+ */
+static void hsspi_set(struct clk *clk, int enable)
+{
+        u32 mask;
+
+        if (BCMCPU_IS_6328())
+                mask = CKCTL_6328_HSSPI_EN;
+        else if (BCMCPU_IS_6362())
+                mask = CKCTL_6362_HSSPI_EN;
+        else
+                return;
+
+        bcm_hwclock_set(mask, enable);
+}
+
+static struct clk clk_hsspi = {
+        .set    = hsspi_set,
+};
+
+/*
+ * HSSPI PLL
+ */
+static struct clk clk_hsspi_pll;
+
+/*
+ * XTM clock
+ */
+static void xtm_set(struct clk *clk, int enable)
+{
+        if (!BCMCPU_IS_6368())
+                return;
+
+        if (enable)
+                clk_enable_unlocked(&clk_swpkt_sar);
+        else
+                clk_disable_unlocked(&clk_swpkt_sar);
+
+        bcm_hwclock_set(CKCTL_6368_SAR_EN, enable);
+
+        if (enable) {
+                /* reset sar core afer clock change */
+                bcm63xx_core_set_reset(BCM63XX_RESET_SAR, 1);
+                mdelay(1);
+                bcm63xx_core_set_reset(BCM63XX_RESET_SAR, 0);
+                mdelay(1);
+        }
+}
+
+
+static struct clk clk_xtm = {
+        .set    = xtm_set,
+};
+
+/*
+ * IPsec clock
+ */
+static void ipsec_set(struct clk *clk, int enable)
+{
+        if (BCMCPU_IS_6362())
+                bcm_hwclock_set(CKCTL_6362_IPSEC_EN, enable);
+        else if (BCMCPU_IS_6368())
+                bcm_hwclock_set(CKCTL_6368_IPSEC_EN, enable);
+}
+
+static struct clk clk_ipsec = {
+        .set    = ipsec_set,
+};
+
+/*
+ * PCIe clock
+ */
+
+static void pcie_set(struct clk *clk, int enable)
+{
+        if (BCMCPU_IS_6328())
+                bcm_hwclock_set(CKCTL_6328_PCIE_EN, enable);
+        else if (BCMCPU_IS_6362())
+                bcm_hwclock_set(CKCTL_6362_PCIE_EN, enable);
+}
+
+static struct clk clk_pcie = {
+        .set    = pcie_set,
+};
+
+/*
+ * Internal peripheral clock
+ */
+static struct clk clk_periph = {
+        .rate   = (50 * 1000 * 1000),
+};
+
+
+/*
+ * Linux clock API implementation
+ */
+int clk_enable(struct clk *clk)
+{
+        if (!clk)
+                return 0;
+        mutex_lock(&clocks_mutex);
+        clk_enable_unlocked(clk);
+        mutex_unlock(&clocks_mutex);
+        return 0;
+}
+
+EXPORT_SYMBOL(clk_enable);
+
+void clk_disable(struct clk *clk)
+{
+        if (!clk)
+                return;
+
+        mutex_lock(&clocks_mutex);
+        clk_disable_unlocked(clk);
+        mutex_unlock(&clocks_mutex);
+}
+
+EXPORT_SYMBOL(clk_disable);
+
+struct clk *clk_get_parent(struct clk *clk)
+{
+        return NULL;
+}
+EXPORT_SYMBOL(clk_get_parent);
+
+int clk_set_parent(struct clk *clk, struct clk *parent)
+{
+        return 0;
+}
+EXPORT_SYMBOL(clk_set_parent);
+
+unsigned long clk_get_rate(struct clk *clk)
+{
+        if (!clk)
+                return 0;
+
+        return clk->rate;
+}
+
+EXPORT_SYMBOL(clk_get_rate);
+
+int clk_set_rate(struct clk *clk, unsigned long rate)
+{
+        return 0;
+}
+EXPORT_SYMBOL_GPL(clk_set_rate);
+
+long clk_round_rate(struct clk *clk, unsigned long rate)
+{
+        return 0;
+}
+EXPORT_SYMBOL_GPL(clk_round_rate);
+
+static struct clk_lookup bcm3368_clks[] = {
+        /* fixed rate clocks */
+        CLKDEV_INIT(NULL, "periph", &clk_periph),
+        CLKDEV_INIT("bcm63xx_uart.0", "refclk", &clk_periph),
+        CLKDEV_INIT("bcm63xx_uart.1", "refclk", &clk_periph),
+        /* gated clocks */
+        CLKDEV_INIT(NULL, "enet0", &clk_enet0),
+        CLKDEV_INIT(NULL, "enet1", &clk_enet1),
+        CLKDEV_INIT(NULL, "ephy", &clk_ephy),
+        CLKDEV_INIT(NULL, "usbh", &clk_usbh),
+        CLKDEV_INIT(NULL, "usbd", &clk_usbd),
+        CLKDEV_INIT(NULL, "spi", &clk_spi),
+        CLKDEV_INIT(NULL, "pcm", &clk_pcm),
+        CLKDEV_INIT("bcm63xx_enet.0", "enet", &clk_enet0),
+        CLKDEV_INIT("bcm63xx_enet.1", "enet", &clk_enet1),
+};
+
+static struct clk_lookup bcm6328_clks[] = {
+        /* fixed rate clocks */
+        CLKDEV_INIT(NULL, "periph", &clk_periph),
+        CLKDEV_INIT("bcm63xx_uart.0", "refclk", &clk_periph),
+        CLKDEV_INIT("bcm63xx_uart.1", "refclk", &clk_periph),
+        CLKDEV_INIT("bcm63xx-hsspi.0", "pll", &clk_hsspi_pll),
+        /* gated clocks */
+        CLKDEV_INIT(NULL, "enetsw", &clk_enetsw),
+        CLKDEV_INIT(NULL, "usbh", &clk_usbh),
+        CLKDEV_INIT(NULL, "usbd", &clk_usbd),
+        CLKDEV_INIT(NULL, "hsspi", &clk_hsspi),
+        CLKDEV_INIT(NULL, "pcie", &clk_pcie),
+};
+
+static struct clk_lookup bcm6338_clks[] = {
+        /* fixed rate clocks */
+        CLKDEV_INIT(NULL, "periph", &clk_periph),
+        CLKDEV_INIT("bcm63xx_uart.0", "refclk", &clk_periph),
+        /* gated clocks */
+        CLKDEV_INIT(NULL, "enet0", &clk_enet0),
+        CLKDEV_INIT(NULL, "enet1", &clk_enet1),
+        CLKDEV_INIT(NULL, "ephy", &clk_ephy),
+        CLKDEV_INIT(NULL, "usbh", &clk_usbh),
+        CLKDEV_INIT(NULL, "usbd", &clk_usbd),
+        CLKDEV_INIT(NULL, "spi", &clk_spi),
+        CLKDEV_INIT("bcm63xx_enet.0", "enet", &clk_enet_misc),
+};
+
+static struct clk_lookup bcm6345_clks[] = {
+        /* fixed rate clocks */
+        CLKDEV_INIT(NULL, "periph", &clk_periph),
+        CLKDEV_INIT("bcm63xx_uart.0", "refclk", &clk_periph),
+        /* gated clocks */
+        CLKDEV_INIT(NULL, "enet0", &clk_enet0),
+        CLKDEV_INIT(NULL, "enet1", &clk_enet1),
+        CLKDEV_INIT(NULL, "ephy", &clk_ephy),
+        CLKDEV_INIT(NULL, "usbh", &clk_usbh),
+        CLKDEV_INIT(NULL, "usbd", &clk_usbd),
+        CLKDEV_INIT(NULL, "spi", &clk_spi),
+        CLKDEV_INIT("bcm63xx_enet.0", "enet", &clk_enet_misc),
+};
+
+static struct clk_lookup bcm6348_clks[] = {
+        /* fixed rate clocks */
+        CLKDEV_INIT(NULL, "periph", &clk_periph),
+        CLKDEV_INIT("bcm63xx_uart.0", "refclk", &clk_periph),
+        /* gated clocks */
+        CLKDEV_INIT(NULL, "enet0", &clk_enet0),
+        CLKDEV_INIT(NULL, "enet1", &clk_enet1),
+        CLKDEV_INIT(NULL, "ephy", &clk_ephy),
+        CLKDEV_INIT(NULL, "usbh", &clk_usbh),
+        CLKDEV_INIT(NULL, "usbd", &clk_usbd),
+        CLKDEV_INIT(NULL, "spi", &clk_spi),
+        CLKDEV_INIT("bcm63xx_enet.0", "enet", &clk_enet_misc),
+        CLKDEV_INIT("bcm63xx_enet.1", "enet", &clk_enet_misc),
+};
+
+static struct clk_lookup bcm6358_clks[] = {
+        /* fixed rate clocks */
+        CLKDEV_INIT(NULL, "periph", &clk_periph),
+        CLKDEV_INIT("bcm63xx_uart.0", "refclk", &clk_periph),
+        CLKDEV_INIT("bcm63xx_uart.1", "refclk", &clk_periph),
+        /* gated clocks */
+        CLKDEV_INIT(NULL, "enet0", &clk_enet0),
+        CLKDEV_INIT(NULL, "enet1", &clk_enet1),
+        CLKDEV_INIT(NULL, "ephy", &clk_ephy),
+        CLKDEV_INIT(NULL, "usbh", &clk_usbh),
+        CLKDEV_INIT(NULL, "usbd", &clk_usbd),
+        CLKDEV_INIT(NULL, "spi", &clk_spi),
+        CLKDEV_INIT(NULL, "pcm", &clk_pcm),
+        CLKDEV_INIT(NULL, "swpkt_sar", &clk_swpkt_sar),
+        CLKDEV_INIT(NULL, "swpkt_usb", &clk_swpkt_usb),
+        CLKDEV_INIT("bcm63xx_enet.0", "enet", &clk_enet0),
+        CLKDEV_INIT("bcm63xx_enet.1", "enet", &clk_enet1),
+};
+
+static struct clk_lookup bcm6362_clks[] = {
+        /* fixed rate clocks */
+        CLKDEV_INIT(NULL, "periph", &clk_periph),
+        CLKDEV_INIT("bcm63xx_uart.0", "refclk", &clk_periph),
+        CLKDEV_INIT("bcm63xx_uart.1", "refclk", &clk_periph),
+        CLKDEV_INIT("bcm63xx-hsspi.0", "pll", &clk_hsspi_pll),
+        /* gated clocks */
+        CLKDEV_INIT(NULL, "enetsw", &clk_enetsw),
+        CLKDEV_INIT(NULL, "usbh", &clk_usbh),
+        CLKDEV_INIT(NULL, "usbd", &clk_usbd),
+        CLKDEV_INIT(NULL, "spi", &clk_spi),
+        CLKDEV_INIT(NULL, "hsspi", &clk_hsspi),
+        CLKDEV_INIT(NULL, "pcie", &clk_pcie),
+        CLKDEV_INIT(NULL, "ipsec", &clk_ipsec),
+};
+
+static struct clk_lookup bcm6368_clks[] = {
+        /* fixed rate clocks */
+        CLKDEV_INIT(NULL, "periph", &clk_periph),
+        CLKDEV_INIT("bcm63xx_uart.0", "refclk", &clk_periph),
+        CLKDEV_INIT("bcm63xx_uart.1", "refclk", &clk_periph),
+        /* gated clocks */
+        CLKDEV_INIT(NULL, "enetsw", &clk_enetsw),
+        CLKDEV_INIT(NULL, "usbh", &clk_usbh),
+        CLKDEV_INIT(NULL, "usbd", &clk_usbd),
+        CLKDEV_INIT(NULL, "spi", &clk_spi),
+        CLKDEV_INIT(NULL, "xtm", &clk_xtm),
+        CLKDEV_INIT(NULL, "ipsec", &clk_ipsec),
+};
+
+#define HSSPI_PLL_HZ_6328       133333333
+#define HSSPI_PLL_HZ_6362       400000000
+
+static int __init bcm63xx_clk_init(void)
+{
+        switch (bcm63xx_get_cpu_id()) {
+        case BCM3368_CPU_ID:
+                clkdev_add_table(bcm3368_clks, ARRAY_SIZE(bcm3368_clks));
+                break;
+        case BCM6328_CPU_ID:
+                clk_hsspi_pll.rate = HSSPI_PLL_HZ_6328;
+                clkdev_add_table(bcm6328_clks, ARRAY_SIZE(bcm6328_clks));
+                break;
+        case BCM6338_CPU_ID:
+                clkdev_add_table(bcm6338_clks, ARRAY_SIZE(bcm6338_clks));
+                break;
+        case BCM6345_CPU_ID:
+                clkdev_add_table(bcm6345_clks, ARRAY_SIZE(bcm6345_clks));
+                break;
+        case BCM6348_CPU_ID:
+                clkdev_add_table(bcm6348_clks, ARRAY_SIZE(bcm6348_clks));
+                break;
+        case BCM6358_CPU_ID:
+                clkdev_add_table(bcm6358_clks, ARRAY_SIZE(bcm6358_clks));
+                break;
+        case BCM6362_CPU_ID:
+                clk_hsspi_pll.rate = HSSPI_PLL_HZ_6362;
+                clkdev_add_table(bcm6362_clks, ARRAY_SIZE(bcm6362_clks));
+                break;
+        case BCM6368_CPU_ID:
+                clkdev_add_table(bcm6368_clks, ARRAY_SIZE(bcm6368_clks));
+                break;
+        }
+
+        return 0;
+}
+arch_initcall(bcm63xx_clk_init);