platform/mdm9640/acpuclock.c

/*
 * Copyright (c) 2013-2015, The Linux Foundation. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *   * Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   * Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *   * Neither the name of Linux Foundation nor
 *     the names of its contributors may be used to endorse or promote
 *     products derived from this software without specific prior written
 *     permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NON-INFRINGEMENT ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <err.h>
#include <assert.h>
#include <debug.h>
#include <reg.h>
#include <clock.h>
#include <mmc.h>
#include <platform/clock.h>
#include <platform/iomap.h>
#include <platform/timer.h>
#include <platform.h>

void clock_config_uart_dm(uint8_t id)
{
	int ret;
	char clk_name[64];

	snprintf(clk_name, sizeof(clk_name), "uart%u_iface_clk", id);
	ret = clk_get_set_enable(clk_name, 0, 1);
	if (ret)
	{
		dprintf(CRITICAL, "failed to set %s ret = %d\n", clk_name, ret);
		ASSERT(0);
	}

	snprintf(clk_name, sizeof(clk_name), "uart%u_core_clk", id);
	ret = clk_get_set_enable(clk_name, 7372800, 1);
	if (ret)
	{
		dprintf(CRITICAL, "failed to set %s ret = %d\n", clk_name, ret);
		ASSERT(0);
	}
}

/*
 * Disable power collapse using GDSCR:
 * Globally Distributed Switch Controller Register
 */
void clock_usb30_gdsc_enable(void)
{
	uint32_t reg = readl(GCC_USB30_GDSCR);

	reg &= ~(0x1);

	writel(reg, GCC_USB30_GDSCR);
}

/* enables usb30 clocks */
void clock_usb30_init(void)
{
	int ret;

	ret = clk_get_set_enable("usb30_iface_clk", 0, 1);
	if(ret)
	{
		dprintf(CRITICAL, "failed to set usb30_iface_clk. ret = %d\n", ret);
		ASSERT(0);
	}

	clock_usb30_gdsc_enable();

	ret = clk_get_set_enable("usb30_master_clk", 125000000, 1);
	if(ret)
	{
		dprintf(CRITICAL, "failed to set usb30_master_clk. ret = %d\n", ret);
		ASSERT(0);
	}

	if (platform_is_mdmcalifornium())
		ret = clk_get_set_enable("usb30_pipe_clk_mdmcalifornium", 0, 1);
	else
		ret = clk_get_set_enable("usb30_pipe_clk", 19200000, 1);

	if(ret)
	{
		dprintf(CRITICAL, "failed to set usb30_pipe_clk. ret = %d\n", ret);
		ASSERT(0);
	}

	ret = clk_get_set_enable("usb30_aux_clk", 1000000, 1);
	if(ret)
	{
		dprintf(CRITICAL, "failed to set usb30_aux_clk. ret = %d\n", ret);
		ASSERT(0);
	}

	ret = clk_get_set_enable("usb30_mock_utmi_clk", 60000000, true);
	if(ret)
	{
		dprintf(CRITICAL, "failed to set usb30_mock_utmi_clk ret = %d\n", ret);
		ASSERT(0);
	}

	ret = clk_get_set_enable("usb30_sleep_clk", 0, true);
	if(ret)
	{
		dprintf(CRITICAL, "failed to set usb30_sleep_clk ret = %d\n", ret);
		ASSERT(0);
	}

	ret = clk_get_set_enable("usb_phy_cfg_ahb_clk", 0, 1);
	if(ret)
	{
		dprintf(CRITICAL, "failed to set usb_phy_cfg_ahb_clk ret = %d\n", ret);
		ASSERT(0);
	}
}

void clock_init_mmc(uint32_t interface)
{
	char clk_name[64];
	int ret;

	snprintf(clk_name, sizeof(clk_name), "sdc%u_iface_clk", interface);

	/* enable interface clock */
	ret = clk_get_set_enable(clk_name, 0, 1);
	if(ret)
	{
		dprintf(CRITICAL, "failed to set sdc1_iface_clk ret = %d\n", ret);
		ASSERT(0);
	}
}

/* Configure MMC clock */
void clock_config_mmc(uint32_t interface, uint32_t freq)
{
	int ret = 0;
	char clk_name[64];

	snprintf(clk_name, sizeof(clk_name), "sdc%u_core_clk", interface);

	if(freq == MMC_CLK_400KHZ)
	{
		ret = clk_get_set_enable(clk_name, 400000, 1);
	}
	else if(freq == MMC_CLK_50MHZ)
	{
		ret = clk_get_set_enable(clk_name, 50000000, 1);
	}
	else if(freq == MMC_CLK_200MHZ)
	{
		ret = clk_get_set_enable(clk_name, 200000000, 1);
	}
	else if(freq == MMC_CLK_171MHZ)
	{
		ret = clk_get_set_enable(clk_name, 171430000, 1);
	}
	else
	{
		dprintf(CRITICAL, "sdc frequency (%u) is not supported\n", freq);
		ASSERT(0);
	}

	if(ret)
	{
		dprintf(CRITICAL, "failed to set %s ret = %d\n", clk_name, ret);
		ASSERT(0);
	}
}

void clock_bumpup_pipe3_clk()
{
	int ret =0;

	if (platform_is_mdmcalifornium())
		ret = clk_get_set_enable("usb30_pipe_clk", 0, true);
	else
		ret = clk_get_set_enable("usb30_pipe_clk", 125000000, true);

	if(ret)
	{
		dprintf(CRITICAL, "failed to set usb30_pipe_clk. ret = %d\n", ret);
		ASSERT(0);
	}
}

void clock_reset_usb_phy()
{
	int ret;

	struct clk *phy_reset_clk = NULL;
	struct clk *pipe_reset_clk = NULL;
	struct clk *master_clk = NULL;

	master_clk = clk_get("usb30_master_clk");
	ASSERT(master_clk);

	/* Look if phy com clock is present */
	phy_reset_clk = clk_get("usb30_phy_reset");
	ASSERT(phy_reset_clk);

	pipe_reset_clk = clk_get("usb30_pipe_clk");
	ASSERT(pipe_reset_clk);

	/* ASSERT */
	ret = clk_reset(master_clk, CLK_RESET_ASSERT);
	if (ret)
	{
		dprintf(CRITICAL, "Failed to assert usb30_master_reset clk\n");
		return;
	}
	ret = clk_reset(phy_reset_clk, CLK_RESET_ASSERT);

	if (ret)
	{
		dprintf(CRITICAL, "Failed to assert usb30_phy_reset clk\n");
		goto deassert_master_clk;
	}

	ret = clk_reset(pipe_reset_clk, CLK_RESET_ASSERT);
	if (ret)
	{
		dprintf(CRITICAL, "Failed to assert usb30_pipe_clk\n");
		goto deassert_phy_clk;
	}

	udelay(100);

	/* DEASSERT */
	ret = clk_reset(pipe_reset_clk, CLK_RESET_DEASSERT);
	if (ret)
	{
		dprintf(CRITICAL, "Failed to deassert usb_pipe_clk\n");
		return;
	}

deassert_phy_clk:

	ret = clk_reset(phy_reset_clk, CLK_RESET_DEASSERT);
	if (ret)
	{
		dprintf(CRITICAL, "Failed to deassert usb30_phy_com_reset clk\n");
		return;
	}
deassert_master_clk:

	ret = clk_reset(master_clk, CLK_RESET_DEASSERT);
	if (ret)
	{
		dprintf(CRITICAL, "Failed to deassert usb30_master clk\n");
		return;
	}

}