ARM1176: TI: TNETV107X soc initial support
TNETV107X is a Texas Instruments SoC based on an ARM1176 core, and with a
bunch on on-chip integrated peripherals. This is an initial commit with
basic functionality, more commits with drivers, etc. to follow.
Signed-off-by: Cyril Chemparathy <cyril@ti.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
diff --git a/arch/arm/cpu/arm1176/tnetv107x/clock.c b/arch/arm/cpu/arm1176/tnetv107x/clock.c
new file mode 100644
index 0000000..e26fec1
--- /dev/null
+++ b/arch/arm/cpu/arm1176/tnetv107x/clock.c
@@ -0,0 +1,451 @@
+/*
+ * TNETV107X: Clock management APIs
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <common.h>
+#include <asm-generic/errno.h>
+#include <asm/io.h>
+#include <asm/processor.h>
+#include <asm/arch/clock.h>
+
+#define CLOCK_BASE TNETV107X_CLOCK_CONTROL_BASE
+#define PSC_BASE TNETV107X_PSC_BASE
+
+#define BIT(x) (1 << (x))
+
+#define MAX_PREDIV 64
+#define MAX_POSTDIV 8
+#define MAX_MULT 512
+#define MAX_DIV (MAX_PREDIV * MAX_POSTDIV)
+
+/* LPSC registers */
+#define PSC_PTCMD 0x120
+#define PSC_PTSTAT 0x128
+#define PSC_MDSTAT(n) (0x800 + (n) * 4)
+#define PSC_MDCTL(n) (0xA00 + (n) * 4)
+
+#define PSC_MDCTL_LRSTZ BIT(8)
+
+#define psc_reg_read(reg) __raw_readl((u32 *)(PSC_BASE + (reg)))
+#define psc_reg_write(reg, val) __raw_writel(val, (u32 *)(PSC_BASE + (reg)))
+
+/* SSPLL registers */
+struct sspll_regs {
+ u32 modes;
+ u32 postdiv;
+ u32 prediv;
+ u32 mult_factor;
+ u32 divider_range;
+ u32 bw_divider;
+ u32 spr_amount;
+ u32 spr_rate_div;
+ u32 diag;
+};
+
+/* SSPLL base addresses */
+static struct sspll_regs *sspll_regs[] = {
+ (struct sspll_regs *)(CLOCK_BASE + 0x040),
+ (struct sspll_regs *)(CLOCK_BASE + 0x080),
+ (struct sspll_regs *)(CLOCK_BASE + 0x0c0),
+};
+
+#define sspll_reg(pll, reg) (&(sspll_regs[pll]->reg))
+#define sspll_reg_read(pll, reg) __raw_readl(sspll_reg(pll, reg))
+#define sspll_reg_write(pll, reg, val) __raw_writel(val, sspll_reg(pll, reg))
+
+
+/* PLL Control Registers */
+struct pllctl_regs {
+ u32 ctl; /* 00 */
+ u32 ocsel; /* 04 */
+ u32 secctl; /* 08 */
+ u32 __pad0;
+ u32 mult; /* 10 */
+ u32 prediv; /* 14 */
+ u32 div1; /* 18 */
+ u32 div2; /* 1c */
+ u32 div3; /* 20 */
+ u32 oscdiv1; /* 24 */
+ u32 postdiv; /* 28 */
+ u32 bpdiv; /* 2c */
+ u32 wakeup; /* 30 */
+ u32 __pad1;
+ u32 cmd; /* 38 */
+ u32 stat; /* 3c */
+ u32 alnctl; /* 40 */
+ u32 dchange; /* 44 */
+ u32 cken; /* 48 */
+ u32 ckstat; /* 4c */
+ u32 systat; /* 50 */
+ u32 ckctl; /* 54 */
+ u32 __pad2[2];
+ u32 div4; /* 60 */
+ u32 div5; /* 64 */
+ u32 div6; /* 68 */
+ u32 div7; /* 6c */
+ u32 div8; /* 70 */
+};
+
+struct lpsc_map {
+ int pll, div;
+};
+
+static struct pllctl_regs *pllctl_regs[] = {
+ (struct pllctl_regs *)(CLOCK_BASE + 0x700),
+ (struct pllctl_regs *)(CLOCK_BASE + 0x300),
+ (struct pllctl_regs *)(CLOCK_BASE + 0x500),
+};
+
+#define pllctl_reg(pll, reg) (&(pllctl_regs[pll]->reg))
+#define pllctl_reg_read(pll, reg) __raw_readl(pllctl_reg(pll, reg))
+#define pllctl_reg_write(pll, reg, val) __raw_writel(val, pllctl_reg(pll, reg))
+
+#define pllctl_reg_rmw(pll, reg, mask, val) \
+ pllctl_reg_write(pll, reg, \
+ (pllctl_reg_read(pll, reg) & ~(mask)) | val)
+
+#define pllctl_reg_setbits(pll, reg, mask) \
+ pllctl_reg_rmw(pll, reg, 0, mask)
+
+#define pllctl_reg_clrbits(pll, reg, mask) \
+ pllctl_reg_rmw(pll, reg, mask, 0)
+
+/* PLLCTL Bits */
+#define PLLCTL_CLKMODE BIT(8)
+#define PLLCTL_PLLSELB BIT(7)
+#define PLLCTL_PLLENSRC BIT(5)
+#define PLLCTL_PLLDIS BIT(4)
+#define PLLCTL_PLLRST BIT(3)
+#define PLLCTL_PLLPWRDN BIT(1)
+#define PLLCTL_PLLEN BIT(0)
+
+#define PLLDIV_ENABLE BIT(15)
+
+static int pll_div_offset[] = {
+#define div_offset(reg) offsetof(struct pllctl_regs, reg)
+ div_offset(div1), div_offset(div2), div_offset(div3),
+ div_offset(div4), div_offset(div5), div_offset(div6),
+ div_offset(div7), div_offset(div8),
+};
+
+static unsigned long pll_bypass_mask[] = { 1, 4, 2 };
+static unsigned long pll_div_mask[] = { 0x01ff, 0x00ff, 0x00ff };
+
+/* Mappings from PLL+DIV to subsystem clocks */
+#define sys_arm1176_clk {SYS_PLL, 0}
+#define sys_dsp_clk {SYS_PLL, 1}
+#define sys_ddr_clk {SYS_PLL, 2}
+#define sys_full_clk {SYS_PLL, 3}
+#define sys_lcd_clk {SYS_PLL, 4}
+#define sys_vlynq_ref_clk {SYS_PLL, 5}
+#define sys_tsc_clk {SYS_PLL, 6}
+#define sys_half_clk {SYS_PLL, 7}
+
+#define eth_clk_5 {ETH_PLL, 0}
+#define eth_clk_50 {ETH_PLL, 1}
+#define eth_clk_125 {ETH_PLL, 2}
+#define eth_clk_250 {ETH_PLL, 3}
+#define eth_clk_25 {ETH_PLL, 4}
+
+#define tdm_clk {TDM_PLL, 0}
+#define tdm_extra_clk {TDM_PLL, 1}
+#define tdm1_clk {TDM_PLL, 2}
+
+/* Optimization barrier */
+#define barrier() \
+ __asm__ __volatile__("mov r0, r0\n" : : : "memory");
+
+static const struct lpsc_map lpsc_clk_map[] = {
+ [TNETV107X_LPSC_ARM] = sys_arm1176_clk,
+ [TNETV107X_LPSC_GEM] = sys_dsp_clk,
+ [TNETV107X_LPSC_DDR2_PHY] = sys_ddr_clk,
+ [TNETV107X_LPSC_TPCC] = sys_full_clk,
+ [TNETV107X_LPSC_TPTC0] = sys_full_clk,
+ [TNETV107X_LPSC_TPTC1] = sys_full_clk,
+ [TNETV107X_LPSC_RAM] = sys_full_clk,
+ [TNETV107X_LPSC_MBX_LITE] = sys_arm1176_clk,
+ [TNETV107X_LPSC_LCD] = sys_lcd_clk,
+ [TNETV107X_LPSC_ETHSS] = eth_clk_125,
+ [TNETV107X_LPSC_AEMIF] = sys_full_clk,
+ [TNETV107X_LPSC_CHIP_CFG] = sys_half_clk,
+ [TNETV107X_LPSC_TSC] = sys_tsc_clk,
+ [TNETV107X_LPSC_ROM] = sys_half_clk,
+ [TNETV107X_LPSC_UART2] = sys_half_clk,
+ [TNETV107X_LPSC_PKTSEC] = sys_half_clk,
+ [TNETV107X_LPSC_SECCTL] = sys_half_clk,
+ [TNETV107X_LPSC_KEYMGR] = sys_half_clk,
+ [TNETV107X_LPSC_KEYPAD] = sys_half_clk,
+ [TNETV107X_LPSC_GPIO] = sys_half_clk,
+ [TNETV107X_LPSC_MDIO] = sys_half_clk,
+ [TNETV107X_LPSC_SDIO0] = sys_half_clk,
+ [TNETV107X_LPSC_UART0] = sys_half_clk,
+ [TNETV107X_LPSC_UART1] = sys_half_clk,
+ [TNETV107X_LPSC_TIMER0] = sys_half_clk,
+ [TNETV107X_LPSC_TIMER1] = sys_half_clk,
+ [TNETV107X_LPSC_WDT_ARM] = sys_half_clk,
+ [TNETV107X_LPSC_WDT_DSP] = sys_half_clk,
+ [TNETV107X_LPSC_SSP] = sys_half_clk,
+ [TNETV107X_LPSC_TDM0] = tdm_clk,
+ [TNETV107X_LPSC_VLYNQ] = sys_vlynq_ref_clk,
+ [TNETV107X_LPSC_MCDMA] = sys_half_clk,
+ [TNETV107X_LPSC_USB0] = sys_half_clk,
+ [TNETV107X_LPSC_TDM1] = tdm1_clk,
+ [TNETV107X_LPSC_DEBUGSS] = sys_half_clk,
+ [TNETV107X_LPSC_ETHSS_RGMII] = eth_clk_250,
+ [TNETV107X_LPSC_SYSTEM] = sys_half_clk,
+ [TNETV107X_LPSC_IMCOP] = sys_dsp_clk,
+ [TNETV107X_LPSC_SPARE] = sys_half_clk,
+ [TNETV107X_LPSC_SDIO1] = sys_half_clk,
+ [TNETV107X_LPSC_USB1] = sys_half_clk,
+ [TNETV107X_LPSC_USBSS] = sys_half_clk,
+ [TNETV107X_LPSC_DDR2_EMIF1_VRST] = sys_ddr_clk,
+ [TNETV107X_LPSC_DDR2_EMIF2_VCTL_RST] = sys_ddr_clk,
+};
+
+static const unsigned long pll_ext_freq[] = {
+ [SYS_PLL] = CONFIG_PLL_SYS_EXT_FREQ,
+ [ETH_PLL] = CONFIG_PLL_ETH_EXT_FREQ,
+ [TDM_PLL] = CONFIG_PLL_TDM_EXT_FREQ,
+};
+
+static unsigned long pll_freq_get(int pll)
+{
+ unsigned long mult = 1, prediv = 1, postdiv = 1;
+ unsigned long ref = CONFIG_SYS_INT_OSC_FREQ;
+ unsigned long ret;
+ u32 bypass;
+
+ bypass = __raw_readl((u32 *)(CLOCK_BASE));
+ if (!(bypass & pll_bypass_mask[pll])) {
+ mult = sspll_reg_read(pll, mult_factor);
+ prediv = sspll_reg_read(pll, prediv) + 1;
+ postdiv = sspll_reg_read(pll, postdiv) + 1;
+ }
+
+ if (pllctl_reg_read(pll, ctl) & PLLCTL_CLKMODE)
+ ref = pll_ext_freq[pll];
+
+ if (!(pllctl_reg_read(pll, ctl) & PLLCTL_PLLEN))
+ return ref;
+
+ ret = (unsigned long)(ref + ((unsigned long long)ref * mult) / 256);
+ ret /= (prediv * postdiv);
+
+ return ret;
+}
+
+static unsigned long __pll_div_freq_get(int pll, unsigned int fpll,
+ int div)
+{
+ int divider = 1;
+ unsigned long divreg;
+
+ divreg = __raw_readl((void *)pllctl_regs[pll] + pll_div_offset[div]);
+
+ if (divreg & PLLDIV_ENABLE)
+ divider = (divreg & pll_div_mask[pll]) + 1;
+
+ return fpll / divider;
+}
+
+static unsigned long pll_div_freq_get(int pll, int div)
+{
+ unsigned int fpll = pll_freq_get(pll);
+
+ return __pll_div_freq_get(pll, fpll, div);
+}
+
+static void __pll_div_freq_set(int pll, unsigned int fpll, int div,
+ unsigned long hz)
+{
+ int divider = (fpll / hz - 1);
+
+ divider &= pll_div_mask[pll];
+ divider |= PLLDIV_ENABLE;
+
+ __raw_writel(divider, (void *)pllctl_regs[pll] + pll_div_offset[div]);
+ pllctl_reg_setbits(pll, alnctl, (1 << div));
+ pllctl_reg_setbits(pll, dchange, (1 << div));
+}
+
+static unsigned long pll_div_freq_set(int pll, int div, unsigned long hz)
+{
+ unsigned int fpll = pll_freq_get(pll);
+
+ __pll_div_freq_set(pll, fpll, div, hz);
+
+ pllctl_reg_write(pll, cmd, 1);
+
+ /* Wait until new divider takes effect */
+ while (pllctl_reg_read(pll, stat) & 0x01);
+
+ return __pll_div_freq_get(pll, fpll, div);
+}
+
+unsigned long clk_get_rate(unsigned int clk)
+{
+ return pll_div_freq_get(lpsc_clk_map[clk].pll, lpsc_clk_map[clk].div);
+}
+
+unsigned long clk_round_rate(unsigned int clk, unsigned long hz)
+{
+ unsigned long fpll, divider, pll;
+
+ pll = lpsc_clk_map[clk].pll;
+ fpll = pll_freq_get(pll);
+ divider = (fpll / hz - 1);
+ divider &= pll_div_mask[pll];
+
+ return fpll / (divider + 1);
+}
+
+int clk_set_rate(unsigned int clk, unsigned long _hz)
+{
+ unsigned long hz;
+
+ hz = clk_round_rate(clk, _hz);
+ if (hz != _hz)
+ return -EINVAL; /* Cannot set to target freq */
+
+ pll_div_freq_set(lpsc_clk_map[clk].pll, lpsc_clk_map[clk].div, hz);
+ return 0;
+}
+
+void lpsc_control(int mod, unsigned long state, int lrstz)
+{
+ u32 mdctl;
+
+ mdctl = psc_reg_read(PSC_MDCTL(mod));
+ mdctl &= ~0x1f;
+ mdctl |= state;
+
+ if (lrstz == 0)
+ mdctl &= ~PSC_MDCTL_LRSTZ;
+ else if (lrstz == 1)
+ mdctl |= PSC_MDCTL_LRSTZ;
+
+ psc_reg_write(PSC_MDCTL(mod), mdctl);
+
+ psc_reg_write(PSC_PTCMD, 1);
+
+ /* wait for power domain transition to end */
+ while (psc_reg_read(PSC_PTSTAT) & 1);
+
+ /* Wait for module state change */
+ while ((psc_reg_read(PSC_MDSTAT(mod)) & 0x1f) != state);
+}
+
+int lpsc_status(unsigned int id)
+{
+ return psc_reg_read(PSC_MDSTAT(id)) & 0x1f;
+}
+
+static void init_pll(const struct pll_init_data *data)
+{
+ unsigned long fpll;
+ unsigned long best_pre = 0, best_post = 0, best_mult = 0;
+ unsigned long div, prediv, postdiv, mult;
+ unsigned long delta, actual;
+ long best_delta = -1;
+ int i;
+ u32 tmp;
+
+ if (data->pll == SYS_PLL)
+ return; /* cannot reconfigure system pll on the fly */
+
+ tmp = pllctl_reg_read(data->pll, ctl);
+ if (data->internal_osc) {
+ tmp &= ~PLLCTL_CLKMODE;
+ fpll = CONFIG_SYS_INT_OSC_FREQ;
+ } else {
+ tmp |= PLLCTL_CLKMODE;
+ fpll = pll_ext_freq[data->pll];
+ }
+ pllctl_reg_write(data->pll, ctl, tmp);
+
+ mult = data->pll_freq / fpll;
+ for (mult = MAX(mult, 1); mult <= MAX_MULT; mult++) {
+ div = (fpll * mult) / data->pll_freq;
+ if (div < 1 || div > MAX_DIV)
+ continue;
+
+ for (postdiv = 1; postdiv <= min(div, MAX_POSTDIV); postdiv++) {
+ prediv = div / postdiv;
+ if (prediv < 1 || prediv > MAX_PREDIV)
+ continue;
+
+ actual = (fpll / prediv) * (mult / postdiv);
+ delta = (actual - data->pll_freq);
+ if (delta < 0)
+ delta = -delta;
+ if ((delta < best_delta) || (best_delta == -1)) {
+ best_delta = delta;
+ best_mult = mult;
+ best_pre = prediv;
+ best_post = postdiv;
+ if (delta == 0)
+ goto done;
+ }
+ }
+ }
+done:
+
+ if (best_delta == -1) {
+ printf("pll cannot derive %lu from %lu\n",
+ data->pll_freq, fpll);
+ return;
+ }
+
+ fpll = fpll * best_mult;
+ fpll /= best_pre * best_post;
+
+ pllctl_reg_clrbits(data->pll, ctl, PLLCTL_PLLENSRC);
+ pllctl_reg_clrbits(data->pll, ctl, PLLCTL_PLLEN);
+
+ pllctl_reg_setbits(data->pll, ctl, PLLCTL_PLLRST);
+
+ pllctl_reg_clrbits(data->pll, ctl, PLLCTL_PLLPWRDN);
+ pllctl_reg_clrbits(data->pll, ctl, PLLCTL_PLLDIS);
+
+ sspll_reg_write(data->pll, mult_factor, (best_mult - 1) << 8);
+ sspll_reg_write(data->pll, prediv, best_pre - 1);
+ sspll_reg_write(data->pll, postdiv, best_post - 1);
+
+ for (i = 0; i < 10; i++)
+ if (data->div_freq[i])
+ __pll_div_freq_set(data->pll, fpll, i,
+ data->div_freq[i]);
+
+ pllctl_reg_write(data->pll, cmd, 1);
+
+ /* Wait until pll "go" operation completes */
+ while (pllctl_reg_read(data->pll, stat) & 0x01);
+
+ pllctl_reg_clrbits(data->pll, ctl, PLLCTL_PLLRST);
+ pllctl_reg_setbits(data->pll, ctl, PLLCTL_PLLEN);
+}
+
+void init_plls(int num_pll, struct pll_init_data *config)
+{
+ int i;
+
+ for (i = 0; i < num_pll; i++)
+ init_pll(&config[i]);
+}