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ARM: AM33xx: Cleanup clocks layer

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Cleaning up the clocks layer.
This helps in addition of new Soc with minimal
changes.
This is derived from OMAP4 boards.

Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Tested-by: Heiko Schocher <hs@denx.de>
Acked-by: Heiko Schocher <hs@denx.de>
This commit is contained in:
Lokesh Vutla 2013-07-30 10:48:53 +05:30 committed by Tom Rini
parent 94d77fb656
commit 95cb69faeb
10 changed files with 189 additions and 232 deletions
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6
arch/arm/cpu/armv7/am33xx/board.c
View file

@ -56,12 +56,6 @@ int cpu_mmc_init(bd_t *bis)
}
#endif
void setup_clocks_for_console(void)
{
/* Not yet implemented */
return;
}
/* AM33XX has two MUSB controllers which can be host or gadget */
#if (defined(CONFIG_MUSB_GADGET) || defined(CONFIG_MUSB_HOST)) && \
(defined(CONFIG_AM335X_USB0) || defined(CONFIG_AM335X_USB1))

62
arch/arm/cpu/armv7/am33xx/clock.c
View file

@ -98,7 +98,7 @@ void do_setup_dpll(const struct dpll_regs *dpll_regs,
wait_for_lock(dpll_regs);
}
void setup_dplls(void)
static void setup_dplls(void)
{
const struct dpll_params *params;
do_setup_dpll(&dpll_core_regs, &dpll_core);
@ -109,3 +109,63 @@ void setup_dplls(void)
params = get_dpll_ddr_params();
do_setup_dpll(&dpll_ddr_regs, params);
}
static inline void wait_for_clk_enable(u32 *clkctrl_addr)
{
u32 clkctrl, idlest = MODULE_CLKCTRL_IDLEST_DISABLED;
u32 bound = LDELAY;
while ((idlest == MODULE_CLKCTRL_IDLEST_DISABLED) ||
(idlest == MODULE_CLKCTRL_IDLEST_TRANSITIONING)) {
clkctrl = readl(clkctrl_addr);
idlest = (clkctrl & MODULE_CLKCTRL_IDLEST_MASK) >>
MODULE_CLKCTRL_IDLEST_SHIFT;
if (--bound == 0) {
printf("Clock enable failed for 0x%p idlest 0x%x\n",
clkctrl_addr, clkctrl);
return;
}
}
}
static inline void enable_clock_module(u32 *const clkctrl_addr, u32 enable_mode,
u32 wait_for_enable)
{
clrsetbits_le32(clkctrl_addr, MODULE_CLKCTRL_MODULEMODE_MASK,
enable_mode << MODULE_CLKCTRL_MODULEMODE_SHIFT);
debug("Enable clock module - %p\n", clkctrl_addr);
if (wait_for_enable)
wait_for_clk_enable(clkctrl_addr);
}
static inline void enable_clock_domain(u32 *const clkctrl_reg, u32 enable_mode)
{
clrsetbits_le32(clkctrl_reg, CD_CLKCTRL_CLKTRCTRL_MASK,
enable_mode << CD_CLKCTRL_CLKTRCTRL_SHIFT);
debug("Enable clock domain - %p\n", clkctrl_reg);
}
void do_enable_clocks(u32 *const *clk_domains,
u32 *const *clk_modules_explicit_en, u8 wait_for_enable)
{
u32 i, max = 100;
/* Put the clock domains in SW_WKUP mode */
for (i = 0; (i < max) && clk_domains[i]; i++) {
enable_clock_domain(clk_domains[i],
CD_CLKCTRL_CLKTRCTRL_SW_WKUP);
}
/* Clock modules that need to be put in SW_EXPLICIT_EN mode */
for (i = 0; (i < max) && clk_modules_explicit_en[i]; i++) {
enable_clock_module(clk_modules_explicit_en[i],
MODULE_CLKCTRL_MODULEMODE_SW_EXPLICIT_EN,
wait_for_enable);
};
}
void prcm_init()
{
enable_basic_clocks();
setup_dplls();
}

267
arch/arm/cpu/armv7/am33xx/clock_am33xx.c
View file

@ -14,17 +14,12 @@
#include <asm/arch/hardware.h>
#include <asm/io.h>
#define PRCM_MOD_EN 0x2
#define PRCM_FORCE_WAKEUP 0x2
#define PRCM_FUNCTL 0x0
#define CPGMAC0_IDLE 0x30000
#define OSC (V_OSCK/1000000)
const struct cm_perpll *cmper = (struct cm_perpll *)CM_PER;
const struct cm_wkuppll *cmwkup = (struct cm_wkuppll *)CM_WKUP;
const struct cm_dpll *cmdpll = (struct cm_dpll *)CM_DPLL;
const struct cm_rtc *cmrtc = (struct cm_rtc *)CM_RTC;
struct cm_perpll *const cmper = (struct cm_perpll *)CM_PER;
struct cm_wkuppll *const cmwkup = (struct cm_wkuppll *)CM_WKUP;
struct cm_dpll *const cmdpll = (struct cm_dpll *)CM_DPLL;
struct cm_rtc *const cmrtc = (struct cm_rtc *)CM_RTC;
const struct dpll_regs dpll_mpu_regs = {
.cm_clkmode_dpll = CM_WKUP + 0x88,
@ -63,199 +58,85 @@ const struct dpll_params dpll_core = {
const struct dpll_params dpll_per = {
960, OSC-1, 5, -1, -1, -1, -1};
static void enable_interface_clocks(void)
void setup_clocks_for_console(void)
{
/* Enable all the Interconnect Modules */
writel(PRCM_MOD_EN, &cmper->l3clkctrl);
while (readl(&cmper->l3clkctrl) != PRCM_MOD_EN)
;
clrsetbits_le32(&cmwkup->wkclkstctrl, CD_CLKCTRL_CLKTRCTRL_MASK,
CD_CLKCTRL_CLKTRCTRL_SW_WKUP <<
CD_CLKCTRL_CLKTRCTRL_SHIFT);
writel(PRCM_MOD_EN, &cmper->l4lsclkctrl);
while (readl(&cmper->l4lsclkctrl) != PRCM_MOD_EN)
;
clrsetbits_le32(&cmper->l4hsclkstctrl, CD_CLKCTRL_CLKTRCTRL_MASK,
CD_CLKCTRL_CLKTRCTRL_SW_WKUP <<
CD_CLKCTRL_CLKTRCTRL_SHIFT);
writel(PRCM_MOD_EN, &cmper->l4fwclkctrl);
while (readl(&cmper->l4fwclkctrl) != PRCM_MOD_EN)
;
writel(PRCM_MOD_EN, &cmwkup->wkl4wkclkctrl);
while (readl(&cmwkup->wkl4wkclkctrl) != PRCM_MOD_EN)
;
writel(PRCM_MOD_EN, &cmper->l3instrclkctrl);
while (readl(&cmper->l3instrclkctrl) != PRCM_MOD_EN)
;
writel(PRCM_MOD_EN, &cmper->l4hsclkctrl);
while (readl(&cmper->l4hsclkctrl) != PRCM_MOD_EN)
;
writel(PRCM_MOD_EN, &cmwkup->wkgpio0clkctrl);
while (readl(&cmwkup->wkgpio0clkctrl) != PRCM_MOD_EN)
;
clrsetbits_le32(&cmwkup->wkup_uart0ctrl,
MODULE_CLKCTRL_MODULEMODE_MASK,
MODULE_CLKCTRL_MODULEMODE_SW_EXPLICIT_EN <<
MODULE_CLKCTRL_MODULEMODE_SHIFT);
clrsetbits_le32(&cmper->uart1clkctrl,
MODULE_CLKCTRL_MODULEMODE_MASK,
MODULE_CLKCTRL_MODULEMODE_SW_EXPLICIT_EN <<
MODULE_CLKCTRL_MODULEMODE_SHIFT);
clrsetbits_le32(&cmper->uart2clkctrl,
MODULE_CLKCTRL_MODULEMODE_MASK,
MODULE_CLKCTRL_MODULEMODE_SW_EXPLICIT_EN <<
MODULE_CLKCTRL_MODULEMODE_SHIFT);
clrsetbits_le32(&cmper->uart3clkctrl,
MODULE_CLKCTRL_MODULEMODE_MASK,
MODULE_CLKCTRL_MODULEMODE_SW_EXPLICIT_EN <<
MODULE_CLKCTRL_MODULEMODE_SHIFT);
clrsetbits_le32(&cmper->uart4clkctrl,
MODULE_CLKCTRL_MODULEMODE_MASK,
MODULE_CLKCTRL_MODULEMODE_SW_EXPLICIT_EN <<
MODULE_CLKCTRL_MODULEMODE_SHIFT);
clrsetbits_le32(&cmper->uart5clkctrl,
MODULE_CLKCTRL_MODULEMODE_MASK,
MODULE_CLKCTRL_MODULEMODE_SW_EXPLICIT_EN <<
MODULE_CLKCTRL_MODULEMODE_SHIFT);
}
/*
* Force power domain wake up transition
* Ensure that the corresponding interface clock is active before
* using the peripheral
*/
static void power_domain_wkup_transition(void)
void enable_basic_clocks(void)
{
writel(PRCM_FORCE_WAKEUP, &cmper->l3clkstctrl);
writel(PRCM_FORCE_WAKEUP, &cmper->l4lsclkstctrl);
writel(PRCM_FORCE_WAKEUP, &cmwkup->wkclkstctrl);
writel(PRCM_FORCE_WAKEUP, &cmper->l4fwclkstctrl);
writel(PRCM_FORCE_WAKEUP, &cmper->l3sclkstctrl);
}
u32 *const clk_domains[] = {
&cmper->l3clkstctrl,
&cmper->l4fwclkstctrl,
&cmper->l3sclkstctrl,
&cmper->l4lsclkstctrl,
&cmwkup->wkclkstctrl,
&cmper->emiffwclkctrl,
&cmrtc->clkstctrl,
0
};
/*
* Enable the peripheral clock for required peripherals
*/
static void enable_per_clocks(void)
{
/* Enable the control module though RBL would have done it*/
writel(PRCM_MOD_EN, &cmwkup->wkctrlclkctrl);
while (readl(&cmwkup->wkctrlclkctrl) != PRCM_MOD_EN)
;
u32 *const clk_modules_explicit_en[] = {
&cmper->l3clkctrl,
&cmper->l4lsclkctrl,
&cmper->l4fwclkctrl,
&cmwkup->wkl4wkclkctrl,
&cmper->l3instrclkctrl,
&cmper->l4hsclkctrl,
&cmwkup->wkgpio0clkctrl,
&cmwkup->wkctrlclkctrl,
&cmper->timer2clkctrl,
&cmper->gpmcclkctrl,
&cmper->elmclkctrl,
&cmper->mmc0clkctrl,
&cmper->mmc1clkctrl,
&cmwkup->wkup_i2c0ctrl,
&cmper->gpio1clkctrl,
&cmper->gpio2clkctrl,
&cmper->gpio3clkctrl,
&cmper->i2c1clkctrl,
&cmper->cpgmac0clkctrl,
&cmper->spi0clkctrl,
&cmrtc->rtcclkctrl,
&cmper->usb0clkctrl,
&cmper->emiffwclkctrl,
&cmper->emifclkctrl,
0
};
/* Enable the module clock */
writel(PRCM_MOD_EN, &cmper->timer2clkctrl);
while (readl(&cmper->timer2clkctrl) != PRCM_MOD_EN)
;
do_enable_clocks(clk_domains, clk_modules_explicit_en, 1);
/* Select the Master osc 24 MHZ as Timer2 clock source */
writel(0x1, &cmdpll->clktimer2clk);
/* UART0 */
writel(PRCM_MOD_EN, &cmwkup->wkup_uart0ctrl);
while (readl(&cmwkup->wkup_uart0ctrl) != PRCM_MOD_EN)
;
/* UART1 */
#ifdef CONFIG_SERIAL2
writel(PRCM_MOD_EN, &cmper->uart1clkctrl);
while (readl(&cmper->uart1clkctrl) != PRCM_MOD_EN)
;
#endif /* CONFIG_SERIAL2 */
/* UART2 */
#ifdef CONFIG_SERIAL3
writel(PRCM_MOD_EN, &cmper->uart2clkctrl);
while (readl(&cmper->uart2clkctrl) != PRCM_MOD_EN)
;
#endif /* CONFIG_SERIAL3 */
/* UART3 */
#ifdef CONFIG_SERIAL4
writel(PRCM_MOD_EN, &cmper->uart3clkctrl);
while (readl(&cmper->uart3clkctrl) != PRCM_MOD_EN)
;
#endif /* CONFIG_SERIAL4 */
/* UART4 */
#ifdef CONFIG_SERIAL5
writel(PRCM_MOD_EN, &cmper->uart4clkctrl);
while (readl(&cmper->uart4clkctrl) != PRCM_MOD_EN)
;
#endif /* CONFIG_SERIAL5 */
/* UART5 */
#ifdef CONFIG_SERIAL6
writel(PRCM_MOD_EN, &cmper->uart5clkctrl);
while (readl(&cmper->uart5clkctrl) != PRCM_MOD_EN)
;
#endif /* CONFIG_SERIAL6 */
/* GPMC */
writel(PRCM_MOD_EN, &cmper->gpmcclkctrl);
while (readl(&cmper->gpmcclkctrl) != PRCM_MOD_EN)
;
/* ELM */
writel(PRCM_MOD_EN, &cmper->elmclkctrl);
while (readl(&cmper->elmclkctrl) != PRCM_MOD_EN)
;
/* MMC0*/
writel(PRCM_MOD_EN, &cmper->mmc0clkctrl);
while (readl(&cmper->mmc0clkctrl) != PRCM_MOD_EN)
;
/* MMC1 */
writel(PRCM_MOD_EN, &cmper->mmc1clkctrl);
while (readl(&cmper->mmc1clkctrl) != PRCM_MOD_EN)
;
/* i2c0 */
writel(PRCM_MOD_EN, &cmwkup->wkup_i2c0ctrl);
while (readl(&cmwkup->wkup_i2c0ctrl) != PRCM_MOD_EN)
;
/* gpio1 module */
writel(PRCM_MOD_EN, &cmper->gpio1clkctrl);
while (readl(&cmper->gpio1clkctrl) != PRCM_MOD_EN)
;
/* gpio2 module */
writel(PRCM_MOD_EN, &cmper->gpio2clkctrl);
while (readl(&cmper->gpio2clkctrl) != PRCM_MOD_EN)
;
/* gpio3 module */
writel(PRCM_MOD_EN, &cmper->gpio3clkctrl);
while (readl(&cmper->gpio3clkctrl) != PRCM_MOD_EN)
;
/* i2c1 */
writel(PRCM_MOD_EN, &cmper->i2c1clkctrl);
while (readl(&cmper->i2c1clkctrl) != PRCM_MOD_EN)
;
/* Ethernet */
writel(PRCM_MOD_EN, &cmper->cpgmac0clkctrl);
while ((readl(&cmper->cpgmac0clkctrl) & CPGMAC0_IDLE) != PRCM_FUNCTL)
;
/* spi0 */
writel(PRCM_MOD_EN, &cmper->spi0clkctrl);
while (readl(&cmper->spi0clkctrl) != PRCM_MOD_EN)
;
/* RTC */
writel(PRCM_MOD_EN, &cmrtc->rtcclkctrl);
while (readl(&cmrtc->rtcclkctrl) != PRCM_MOD_EN)
;
/* MUSB */
writel(PRCM_MOD_EN, &cmper->usb0clkctrl);
while (readl(&cmper->usb0clkctrl) != PRCM_MOD_EN)
;
}
void enable_emif_clocks(void)
{
/* Enable the EMIF_FW Functional clock */
writel(PRCM_MOD_EN, &cmper->emiffwclkctrl);
/* Enable EMIF0 Clock */
writel(PRCM_MOD_EN, &cmper->emifclkctrl);
/* Poll if module is functional */
while ((readl(&cmper->emifclkctrl)) != PRCM_MOD_EN)
;
}
/*
* Configure the PLL/PRCM for necessary peripherals
*/
void pll_init()
{
setup_dplls();
/* Enable the required interconnect clocks */
enable_interface_clocks();
/* Power domain wake up transition */
power_domain_wkup_transition();
/* Enable the required peripherals */
enable_per_clocks();
}

19
arch/arm/cpu/armv7/am33xx/clock_ti814x.c
View file

@ -264,11 +264,6 @@ const struct sata_pll *spll = (struct sata_pll *)SATA_PLL_BASE;
*/
static void enable_per_clocks(void)
{
/* UART0 */
writel(PRCM_MOD_EN, &cmalwon->uart0clkctrl);
while (readl(&cmalwon->uart0clkctrl) != PRCM_MOD_EN)
;
/* HSMMC1 */
writel(PRCM_MOD_EN, &cmalwon->mmchs1clkctrl);
while (readl(&cmalwon->mmchs1clkctrl) != PRCM_MOD_EN)
@ -455,8 +450,6 @@ void sata_pll_config(void)
;
}
void enable_emif_clocks(void) {};
void enable_dmm_clocks(void)
{
writel(PRCM_MOD_EN, &cmdef->fwclkctrl);
@ -477,13 +470,19 @@ void enable_dmm_clocks(void)
;
}
void setup_clocks_for_console(void)
{
unlock_pll_control_mmr();
/* UART0 */
writel(PRCM_MOD_EN, &cmalwon->uart0clkctrl);
while (readl(&cmalwon->uart0clkctrl) != PRCM_MOD_EN)
;
}
/*
* Configure the PLL/PRCM for necessary peripherals
*/
void pll_init()
void prcm_init(void)
{
unlock_pll_control_mmr();
/* Enable the control module */
writel(PRCM_MOD_EN, &cmalwon->controlclkctrl);

1
arch/arm/cpu/armv7/am33xx/emif4.c
View file

@ -87,7 +87,6 @@ void config_ddr(unsigned int pll, unsigned int ioctrl,
const struct ddr_data *data, const struct cmd_control *ctrl,
const struct emif_regs *regs, int nr)
{
enable_emif_clocks();
ddr_pll_config(pll);
config_vtp(nr);
config_cmd_ctrl(ctrl, nr);

28
arch/arm/include/asm/arch-am33xx/clock.h
View file

@ -15,6 +15,28 @@
#define LDELAY 1000000
/*CM_<clock_domain>__CLKCTRL */
#define CD_CLKCTRL_CLKTRCTRL_SHIFT 0
#define CD_CLKCTRL_CLKTRCTRL_MASK 3
#define CD_CLKCTRL_CLKTRCTRL_NO_SLEEP 0
#define CD_CLKCTRL_CLKTRCTRL_SW_SLEEP 1
#define CD_CLKCTRL_CLKTRCTRL_SW_WKUP 2
/* CM_<clock_domain>_<module>_CLKCTRL */
#define MODULE_CLKCTRL_MODULEMODE_SHIFT 0
#define MODULE_CLKCTRL_MODULEMODE_MASK 3
#define MODULE_CLKCTRL_IDLEST_SHIFT 16
#define MODULE_CLKCTRL_IDLEST_MASK (3 << 16)
#define MODULE_CLKCTRL_MODULEMODE_SW_DISABLE 0
#define MODULE_CLKCTRL_MODULEMODE_SW_EXPLICIT_EN 2
#define MODULE_CLKCTRL_IDLEST_FULLY_FUNCTIONAL 0
#define MODULE_CLKCTRL_IDLEST_TRANSITIONING 1
#define MODULE_CLKCTRL_IDLEST_IDLE 2
#define MODULE_CLKCTRL_IDLEST_DISABLED 3
/* CM_CLKMODE_DPLL */
#define CM_CLKMODE_DPLL_REGM4XEN_SHIFT 11
#define CM_CLKMODE_DPLL_REGM4XEN_MASK (1 << 11)
@ -77,10 +99,12 @@ extern const struct dpll_params dpll_core;
extern const struct dpll_params dpll_per;
extern const struct dpll_params dpll_ddr;
extern const struct cm_wkuppll *cmwkup;
extern struct cm_wkuppll *const cmwkup;
void setup_dplls(void);
const struct dpll_params *get_dpll_ddr_params(void);
void do_setup_dpll(const struct dpll_regs *, const struct dpll_params *);
void prcm_init(void);
void enable_basic_clocks(void);
void do_enable_clocks(u32 *const *, u32 *const *, u8);
#endif

2
arch/arm/include/asm/arch-am33xx/ddr_defs.h
View file

@ -146,8 +146,6 @@ void set_sdram_timings(const struct emif_regs *regs, int nr);
*/
void config_ddr_phy(const struct emif_regs *regs, int nr);
void ddr_pll_config(unsigned int ddrpll_m);
struct ddr_cmd_regs {
unsigned int resv0[7];
unsigned int cm0csratio; /* offset 0x01C */

11
board/isee/igep0033/board.c
View file

@ -103,11 +103,7 @@ void s_init(void)
;
#ifdef CONFIG_SPL_BUILD
/* Setup the PLLs and the clocks for the peripherals */
pll_init();
/* Enable RTC32K clock */
rtc32k_enable();
setup_clocks_for_console();
enable_uart0_pin_mux();
@ -116,6 +112,11 @@ void s_init(void)
preloader_console_init();
prcm_init();
/* Enable RTC32K clock */
rtc32k_enable();
/* Configure board pin mux */
enable_board_pin_mux();

13
board/ti/am335x/board.c
View file

@ -317,10 +317,7 @@ void s_init(void)
#if defined(CONFIG_SPL_BUILD) || defined(CONFIG_NOR_BOOT)
/* Setup the PLLs and the clocks for the peripherals */
pll_init();
/* Enable RTC32K clock */
rtc32k_enable();
setup_clocks_for_console();
#ifdef CONFIG_SERIAL1
enable_uart0_pin_mux();
@ -354,12 +351,14 @@ void s_init(void)
preloader_console_init();
#endif
/* Initalize the board header */
enable_i2c0_pin_mux();
i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
prcm_init();
if (read_eeprom(&header) < 0)
puts("Could not get board ID.\n");
/* Enable RTC32K clock */
rtc32k_enable();
enable_board_pin_mux(&header);
if (board_is_evm_sk(&header)) {
/*

12
board/ti/ti814x/evm.c
View file

@ -125,11 +125,7 @@ void s_init(void)
/* Enable timer */
timer_init();
/* Setup the PLLs and the clocks for the peripherals */
pll_init();
/* Enable RTC32K clock */
rtc32k_enable();
setup_clocks_for_console();
/* Set UART pins */
enable_uart0_pin_mux();
@ -147,6 +143,12 @@ void s_init(void)
preloader_console_init();
/* Setup the PLLs and the clocks for the peripherals */
prcm_init();
/* Enable RTC32K clock */
rtc32k_enable();
config_dmm(&evm_lisa_map_regs);
config_ddr(0, 0, &evm_ddr2_data, &evm_ddr2_cctrl_data,