blob: ed2cbfcb3670d7a5347d0da72dbc05e3d4addba1 [file] [log] [blame]
/* Copyright (c) 2014-2015, 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 The 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 "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 <platform/timer.h>
#include <platform/iomap.h>
#include <mmc.h>
#include <clock.h>
#include <platform/clock.h>
#include <blsp_qup.h>
#define MAX_LOOPS 500
void hsusb_clock_init(void)
{
int ret;
struct clk *iclk, *cclk;
ret = clk_get_set_enable("usb_iface_clk", 0, 1);
if(ret)
{
dprintf(CRITICAL, "failed to set usb_iface_clk ret = %d\n", ret);
ASSERT(0);
}
ret = clk_get_set_enable("usb_core_clk", 80000000, 1);
if(ret)
{
dprintf(CRITICAL, "failed to set usb_core_clk ret = %d\n", ret);
ASSERT(0);
}
mdelay(20);
iclk = clk_get("usb_iface_clk");
cclk = clk_get("usb_core_clk");
clk_disable(iclk);
clk_disable(cclk);
mdelay(20);
/* Start the block reset for usb */
writel(1, USB_HS_BCR);
mdelay(20);
/* Take usb block out of reset */
writel(0, USB_HS_BCR);
mdelay(20);
ret = clk_enable(iclk);
if(ret)
{
dprintf(CRITICAL, "failed to set usb_iface_clk after async ret = %d\n", ret);
ASSERT(0);
}
ret = clk_enable(cclk);
if(ret)
{
dprintf(CRITICAL, "failed to set usb_iface_clk after async 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;
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_177MHZ)
{
ret = clk_get_set_enable(clk_name, 177770000, 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);
}
}
/* Configure UART clock based on the UART block id*/
void clock_config_uart_dm(uint8_t id)
{
int ret;
char iclk[64];
char cclk[64];
snprintf(iclk, sizeof(iclk), "uart%u_iface_clk", id);
snprintf(cclk, sizeof(cclk), "uart%u_core_clk", id);
ret = clk_get_set_enable(iclk, 0, 1);
if(ret)
{
dprintf(CRITICAL, "failed to set %s ret = %d\n", iclk, ret);
ASSERT(0);
}
ret = clk_get_set_enable(cclk, 7372800, 1);
if(ret)
{
dprintf(CRITICAL, "failed to set %s ret = %d\n", cclk, ret);
ASSERT(0);
}
}
/* Function to asynchronously reset CE.
* Function assumes that all the CE clocks are off.
*/
static void ce_async_reset(uint8_t instance)
{
/* Start the block reset for CE */
writel(1, GCC_CRYPTO_BCR);
udelay(2);
/* Take CE block out of reset */
writel(0, GCC_CRYPTO_BCR);
udelay(2);
}
void clock_ce_enable(uint8_t instance)
{
int ret;
char clk_name[64];
snprintf(clk_name, sizeof(clk_name), "ce%u_src_clk", instance);
ret = clk_get_set_enable(clk_name, 160000000, 1);
if(ret)
{
dprintf(CRITICAL, "failed to set ce%u_src_clk ret = %d\n", instance, ret);
ASSERT(0);
}
snprintf(clk_name, sizeof(clk_name), "ce%u_core_clk", instance);
ret = clk_get_set_enable(clk_name, 0, 1);
if(ret)
{
dprintf(CRITICAL, "failed to set ce%u_core_clk ret = %d\n", instance, ret);
ASSERT(0);
}
snprintf(clk_name, sizeof(clk_name), "ce%u_ahb_clk", instance);
ret = clk_get_set_enable(clk_name, 0, 1);
if(ret)
{
dprintf(CRITICAL, "failed to set ce%u_ahb_clk ret = %d\n", instance, ret);
ASSERT(0);
}
snprintf(clk_name, sizeof(clk_name), "ce%u_axi_clk", instance);
ret = clk_get_set_enable(clk_name, 0, 1);
if(ret)
{
dprintf(CRITICAL, "failed to set ce%u_axi_clk ret = %d\n", instance, ret);
ASSERT(0);
}
/* Wait for 48 * #pipes cycles.
* This is necessary as immediately after an access control reset (boot up)
* or a debug re-enable, the Crypto core sequentially clears its internal
* pipe key storage memory. If pipe key initialization writes are attempted
* during this time, they may be overwritten by the internal clearing logic.
*/
udelay(1);
}
void clock_ce_disable(uint8_t instance)
{
struct clk *ahb_clk;
struct clk *cclk;
struct clk *axi_clk;
struct clk *src_clk;
char clk_name[64];
snprintf(clk_name, sizeof(clk_name), "ce%u_src_clk", instance);
src_clk = clk_get(clk_name);
snprintf(clk_name, sizeof(clk_name), "ce%u_ahb_clk", instance);
ahb_clk = clk_get(clk_name);
snprintf(clk_name, sizeof(clk_name), "ce%u_axi_clk", instance);
axi_clk = clk_get(clk_name);
snprintf(clk_name, sizeof(clk_name), "ce%u_core_clk", instance);
cclk = clk_get(clk_name);
clk_disable(ahb_clk);
clk_disable(axi_clk);
clk_disable(cclk);
clk_disable(src_clk);
/* Some delay for the clocks to stabalize. */
udelay(1);
}
void clock_config_ce(uint8_t instance)
{
/* Need to enable the clock before disabling since the clk_disable()
* has a check to default to nop when the clk_enable() is not called
* on that particular clock.
*/
clock_ce_enable(instance);
clock_ce_disable(instance);
ce_async_reset(instance);
clock_ce_enable(instance);
}
/* Control the MDSS GDSC */
void mdp_gdsc_ctrl(uint8_t enable)
{
uint32_t reg = 0;
reg = readl(MDP_GDSCR);
if (enable) {
if (!(reg & GDSC_POWER_ON_BIT)) {
reg &= ~(BIT(0) | GDSC_EN_FEW_WAIT_MASK);
reg |= GDSC_EN_FEW_WAIT_256_MASK;
writel(reg, MDP_GDSCR);
while(!(readl(MDP_GDSCR) & (GDSC_POWER_ON_BIT)));
} else {
dprintf(SPEW, "MDP GDSC already enabled\n");
}
} else {
reg |= BIT(0);
writel(reg, MDP_GDSCR);
while(readl(MDP_GDSCR) & (GDSC_POWER_ON_BIT));
}
}
/* Enable all the MDP branch clocks */
void mdp_clock_enable(void)
{
int ret;
ret = clk_get_set_enable("mdp_ahb_clk", 0, 1);
if (ret) {
dprintf(CRITICAL, "failed to set mdp_ahb_clk ret = %d\n", ret);
ASSERT(0);
}
/* Set MDP clock to 160MHz */
ret = clk_get_set_enable("mdss_mdp_clk_src", 160000000, 1);
if (ret) {
dprintf(CRITICAL, "failed to set mdp_clk_src ret = %d\n", ret);
ASSERT(0);
}
ret = clk_get_set_enable("mdss_vsync_clk", 0, 1);
if (ret) {
dprintf(CRITICAL, "failed to set mdss vsync clk ret = %d\n", ret);
ASSERT(0);
}
ret = clk_get_set_enable("mdss_mdp_clk", 0, 1);
if (ret) {
dprintf(CRITICAL, "failed to set mdp_clk ret = %d\n", ret);
ASSERT(0);
}
}
/* Disable all the MDP branch clocks */
void mdp_clock_disable(void)
{
clk_disable(clk_get("mdss_vsync_clk"));
clk_disable(clk_get("mdss_mdp_clk"));
clk_disable(clk_get("mdss_mdp_clk_src"));
clk_disable(clk_get("mdp_ahb_clk"));
}
/* Disable all the bus clocks needed by MDSS */
void mdss_bus_clocks_disable(void)
{
/* Disable MDSS AXI clock */
clk_disable(clk_get("mdss_axi_clk"));
}
/* Enable all the bus clocks needed by MDSS */
void mdss_bus_clocks_enable(void)
{
int ret;
/* Configure AXI clock */
ret = clk_get_set_enable("mdss_axi_clk", 0, 1);
if (ret) {
dprintf(CRITICAL, "failed to set mdss_axi_clk ret = %d\n", ret);
ASSERT(0);
}
}
static void rcg_update_config(uint32_t reg)
{
int i;
for (i = 0; i < MAX_LOOPS; i++) {
if (!(readl(reg) & BIT(0)))
return;
udelay(1);
}
dprintf(CRITICAL, "failed to update rcg config for reg = 0x%x\n", reg);
ASSERT(0);
}
static void branch_clk_halt_check(uint32_t reg)
{
int i;
for (i = 0; i < MAX_LOOPS; i++) {
if (!(readl(reg) & BIT(31)))
return;
udelay(1);
}
dprintf(CRITICAL, "failed to enable branch for reg = 0x%x\n", reg);
ASSERT(0);
}
/* Disable all the branch clocks needed by the DSI controller */
void gcc_dsi_clocks_disable(void)
{
clk_disable(clk_get("mdss_esc0_clk"));
writel(0x0, DSI_PIXEL0_CBCR);
writel(0x0, DSI_BYTE0_CBCR);
}
/* Configure all the branch clocks needed by the DSI controller */
void gcc_dsi_clocks_enable(uint8_t pclk0_m, uint8_t pclk0_n, uint8_t pclk0_d)
{
int ret;
/*
* Configure Byte clock -autopll- This will not change becasue
* byte clock does not need any divider
*/
/* Set the source for DSI0 byte RCG */
writel(0x100, DSI_BYTE0_CFG_RCGR);
/* Set the update RCG bit */
writel(0x1, DSI_BYTE0_CMD_RCGR);
rcg_update_config(DSI_BYTE0_CMD_RCGR);
/* Enable the branch clock */
writel(0x1, DSI_BYTE0_CBCR);
branch_clk_halt_check(DSI_BYTE0_CBCR);
/* Configure Pixel clock */
/* Set the source for DSI0 pixel RCG */
writel(0x100, DSI_PIXEL0_CFG_RCGR);
/* Set the MND for DSI0 pixel clock */
writel(pclk0_m, DSI_PIXEL0_M);
writel(pclk0_n, DSI_PIXEL0_N);
writel(pclk0_d, DSI_PIXEL0_D);
/* Set the update RCG bit */
writel(0x1, DSI_PIXEL0_CMD_RCGR);
rcg_update_config(DSI_PIXEL0_CMD_RCGR);
/* Enable the branch clock */
writel(0x1, DSI_PIXEL0_CBCR);
branch_clk_halt_check(DSI_PIXEL0_CBCR);
/* Configure ESC clock */
ret = clk_get_set_enable("mdss_esc0_clk", 0, 1);
if (ret) {
dprintf(CRITICAL, "failed to set esc0_clk ret = %d\n", ret);
ASSERT(0);
}
}
void clock_config_blsp_i2c(uint8_t blsp_id, uint8_t qup_id)
{
uint8_t ret = 0;
char clk_name[64];
struct clk *qup_clk;
qup_id = qup_id + 1;
if((blsp_id != BLSP_ID_1)) {
dprintf(CRITICAL, "Incorrect BLSP-%d configuration\n", blsp_id);
ASSERT(0);
}
snprintf(clk_name, sizeof(clk_name), "blsp1_qup%u_ahb_iface_clk", qup_id);
ret = clk_get_set_enable(clk_name, 0 , 1);
if (ret) {
dprintf(CRITICAL, "Failed to enable %s clock\n", clk_name);
return;
}
snprintf(clk_name, sizeof(clk_name), "gcc_blsp1_qup%u_i2c_apps_clk", qup_id);
qup_clk = clk_get(clk_name);
if (!qup_clk) {
dprintf(CRITICAL, "Failed to get %s\n", clk_name);
return;
}
ret = clk_enable(qup_clk);
if (ret) {
dprintf(CRITICAL, "Failed to enable %s\n", clk_name);
return;
}
}