2 * SoC-specific lowlevel code for DA850
5 * Heiko Schocher, DENX Software Engineering, hs@denx.de.
7 * SPDX-License-Identifier: GPL-2.0+
13 #include <asm/arch/da850_lowlevel.h>
14 #include <asm/arch/hardware.h>
15 #include <asm/arch/davinci_misc.h>
16 #include <asm/arch/ddr2_defs.h>
17 #include <asm/ti-common/davinci_nand.h>
18 #include <asm/arch/pll_defs.h>
20 void davinci_enable_uart0(void)
22 lpsc_on(DAVINCI_LPSC_UART0);
24 /* Bringup UART0 out of reset */
25 REG(UART0_PWREMU_MGMT) = 0x00006001;
28 #if defined(CONFIG_SYS_DA850_PLL_INIT)
29 static void da850_waitloop(unsigned long loopcnt)
33 for (i = 0; i < loopcnt; i++)
37 static int da850_pll_init(struct davinci_pllc_regs *reg, unsigned long pllmult)
39 if (reg == davinci_pllc0_regs)
40 /* Unlock PLL registers. */
41 clrbits_le32(&davinci_syscfg_regs->cfgchip0, PLL_MASTER_LOCK);
44 * Set PLLENSRC '0',bit 5, PLL Enable(PLLEN) selection is controlled
47 clrbits_le32(®->pllctl, PLLCTL_PLLENSRC);
48 /* PLLCTL.EXTCLKSRC bit 9 should be left at 0 for Freon */
49 clrbits_le32(®->pllctl, PLLCTL_EXTCLKSRC);
51 /* Set PLLEN=0 => PLL BYPASS MODE */
52 clrbits_le32(®->pllctl, PLLCTL_PLLEN);
56 if (reg == davinci_pllc0_regs) {
58 * Select the Clock Mode bit 8 as External Clock or On Chip
61 dv_maskbits(®->pllctl, ~PLLCTL_RES_9);
62 setbits_le32(®->pllctl,
63 (CONFIG_SYS_DV_CLKMODE << PLLCTL_CLOCK_MODE_SHIFT));
66 /* Clear PLLRST bit to reset the PLL */
67 clrbits_le32(®->pllctl, PLLCTL_PLLRST);
69 /* Disable the PLL output */
70 setbits_le32(®->pllctl, PLLCTL_PLLDIS);
72 /* PLL initialization sequence */
74 * Power up the PLL- PWRDN bit set to 0 to bring the PLL out of
77 clrbits_le32(®->pllctl, PLLCTL_PLLPWRDN);
79 /* Enable the PLL from Disable Mode PLLDIS bit to 0 */
80 clrbits_le32(®->pllctl, PLLCTL_PLLDIS);
82 #if defined(CONFIG_SYS_DA850_PLL0_PREDIV)
83 /* program the prediv */
84 if (reg == davinci_pllc0_regs && CONFIG_SYS_DA850_PLL0_PREDIV)
85 writel((PLL_DIVEN | CONFIG_SYS_DA850_PLL0_PREDIV),
89 /* Program the required multiplier value in PLLM */
90 writel(pllmult, ®->pllm);
92 /* program the postdiv */
93 if (reg == davinci_pllc0_regs)
94 writel((PLL_POSTDEN | CONFIG_SYS_DA850_PLL0_POSTDIV),
97 writel((PLL_POSTDEN | CONFIG_SYS_DA850_PLL1_POSTDIV),
101 * Check for the GOSTAT bit in PLLSTAT to clear to 0 to indicate that
102 * no GO operation is currently in progress
104 while ((readl(®->pllstat) & PLLCMD_GOSTAT) == PLLCMD_GOSTAT)
107 if (reg == davinci_pllc0_regs) {
108 writel(CONFIG_SYS_DA850_PLL0_PLLDIV1, ®->plldiv1);
109 writel(CONFIG_SYS_DA850_PLL0_PLLDIV2, ®->plldiv2);
110 writel(CONFIG_SYS_DA850_PLL0_PLLDIV3, ®->plldiv3);
111 writel(CONFIG_SYS_DA850_PLL0_PLLDIV4, ®->plldiv4);
112 writel(CONFIG_SYS_DA850_PLL0_PLLDIV5, ®->plldiv5);
113 writel(CONFIG_SYS_DA850_PLL0_PLLDIV6, ®->plldiv6);
114 writel(CONFIG_SYS_DA850_PLL0_PLLDIV7, ®->plldiv7);
116 writel(CONFIG_SYS_DA850_PLL1_PLLDIV1, ®->plldiv1);
117 writel(CONFIG_SYS_DA850_PLL1_PLLDIV2, ®->plldiv2);
118 writel(CONFIG_SYS_DA850_PLL1_PLLDIV3, ®->plldiv3);
122 * Set the GOSET bit in PLLCMD to 1 to initiate a new divider
125 setbits_le32(®->pllcmd, PLLCMD_GOSTAT);
128 * Wait for the GOSTAT bit in PLLSTAT to clear to 0
129 * (completion of phase alignment).
131 while ((readl(®->pllstat) & PLLCMD_GOSTAT) == PLLCMD_GOSTAT)
134 /* Wait for PLL to reset properly. See PLL spec for PLL reset time */
137 /* Set the PLLRST bit in PLLCTL to 1 to bring the PLL out of reset */
138 setbits_le32(®->pllctl, PLLCTL_PLLRST);
140 /* Wait for PLL to lock. See PLL spec for PLL lock time */
141 da850_waitloop(2400);
144 * Set the PLLEN bit in PLLCTL to 1 to remove the PLL from bypass
147 setbits_le32(®->pllctl, PLLCTL_PLLEN);
151 * clear EMIFA and EMIFB clock source settings, let them
154 if (reg == davinci_pllc0_regs)
155 dv_maskbits(&davinci_syscfg_regs->cfgchip3,
156 ~(PLL_SCSCFG3_DIV45PENA | PLL_SCSCFG3_EMA_CLKSRC));
160 #endif /* CONFIG_SYS_DA850_PLL_INIT */
162 #if defined(CONFIG_SYS_DA850_DDR_INIT)
163 static int da850_ddr_setup(void)
167 /* Enable the Clock to DDR2/mDDR */
168 lpsc_on(DAVINCI_LPSC_DDR_EMIF);
170 tmp = readl(&davinci_syscfg1_regs->vtpio_ctl);
171 if ((tmp & VTP_POWERDWN) == VTP_POWERDWN) {
172 /* Begin VTP Calibration */
173 clrbits_le32(&davinci_syscfg1_regs->vtpio_ctl, VTP_POWERDWN);
174 clrbits_le32(&davinci_syscfg1_regs->vtpio_ctl, VTP_LOCK);
175 setbits_le32(&davinci_syscfg1_regs->vtpio_ctl, VTP_CLKRZ);
176 clrbits_le32(&davinci_syscfg1_regs->vtpio_ctl, VTP_CLKRZ);
177 setbits_le32(&davinci_syscfg1_regs->vtpio_ctl, VTP_CLKRZ);
179 /* Polling READY bit to see when VTP calibration is done */
180 tmp = readl(&davinci_syscfg1_regs->vtpio_ctl);
181 while ((tmp & VTP_READY) != VTP_READY)
182 tmp = readl(&davinci_syscfg1_regs->vtpio_ctl);
184 setbits_le32(&davinci_syscfg1_regs->vtpio_ctl, VTP_LOCK);
185 setbits_le32(&davinci_syscfg1_regs->vtpio_ctl, VTP_POWERDWN);
187 setbits_le32(&davinci_syscfg1_regs->vtpio_ctl, VTP_IOPWRDWN);
188 writel(CONFIG_SYS_DA850_DDR2_DDRPHYCR, &dv_ddr2_regs_ctrl->ddrphycr);
190 if (CONFIG_SYS_DA850_DDR2_SDBCR & (1 << DV_DDR_SDCR_DDR2EN_SHIFT)) {
192 clrbits_le32(&davinci_syscfg1_regs->ddr_slew,
193 (1 << DDR_SLEW_DDR_PDENA_BIT) |
194 (1 << DDR_SLEW_CMOSEN_BIT));
197 setbits_le32(&davinci_syscfg1_regs->ddr_slew,
198 (1 << DDR_SLEW_DDR_PDENA_BIT) |
199 (1 << DDR_SLEW_CMOSEN_BIT));
203 * SDRAM Configuration Register (SDCR):
204 * First set the BOOTUNLOCK bit to make configuration bits
207 setbits_le32(&dv_ddr2_regs_ctrl->sdbcr, DV_DDR_BOOTUNLOCK);
210 * Write the new value of these bits and clear BOOTUNLOCK.
211 * At the same time, set the TIMUNLOCK bit to allow changing
212 * the timing registers
214 tmp = CONFIG_SYS_DA850_DDR2_SDBCR;
215 tmp &= ~DV_DDR_BOOTUNLOCK;
216 tmp |= DV_DDR_TIMUNLOCK;
217 writel(tmp, &dv_ddr2_regs_ctrl->sdbcr);
219 /* write memory configuration and timing */
220 if (!(CONFIG_SYS_DA850_DDR2_SDBCR & (1 << DV_DDR_SDCR_DDR2EN_SHIFT))) {
222 writel(CONFIG_SYS_DA850_DDR2_SDBCR2,
223 &dv_ddr2_regs_ctrl->sdbcr2);
225 writel(CONFIG_SYS_DA850_DDR2_SDTIMR, &dv_ddr2_regs_ctrl->sdtimr);
226 writel(CONFIG_SYS_DA850_DDR2_SDTIMR2, &dv_ddr2_regs_ctrl->sdtimr2);
228 /* clear the TIMUNLOCK bit and write the value of the CL field */
229 tmp &= ~DV_DDR_TIMUNLOCK;
230 writel(tmp, &dv_ddr2_regs_ctrl->sdbcr);
233 * LPMODEN and MCLKSTOPEN must be set!
234 * Without this bits set, PSC don;t switch states !!
236 writel(CONFIG_SYS_DA850_DDR2_SDRCR |
237 (1 << DV_DDR_SRCR_LPMODEN_SHIFT) |
238 (1 << DV_DDR_SRCR_MCLKSTOPEN_SHIFT),
239 &dv_ddr2_regs_ctrl->sdrcr);
241 /* SyncReset the Clock to EMIF3A SDRAM */
242 lpsc_syncreset(DAVINCI_LPSC_DDR_EMIF);
243 /* Enable the Clock to EMIF3A SDRAM */
244 lpsc_on(DAVINCI_LPSC_DDR_EMIF);
246 /* disable self refresh */
247 clrbits_le32(&dv_ddr2_regs_ctrl->sdrcr,
248 DV_DDR_SDRCR_LPMODEN | DV_DDR_SDRCR_MCLKSTOPEN);
249 writel(CONFIG_SYS_DA850_DDR2_PBBPR, &dv_ddr2_regs_ctrl->pbbpr);
253 #endif /* CONFIG_SYS_DA850_DDR_INIT */
255 __attribute__((weak))
256 void board_gpio_init(void)
261 int arch_cpu_init(void)
263 /* Unlock kick registers */
264 writel(DV_SYSCFG_KICK0_UNLOCK, &davinci_syscfg_regs->kick0);
265 writel(DV_SYSCFG_KICK1_UNLOCK, &davinci_syscfg_regs->kick1);
267 dv_maskbits(&davinci_syscfg_regs->suspsrc,
268 CONFIG_SYS_DA850_SYSCFG_SUSPSRC);
270 /* configure pinmux settings */
271 if (davinci_configure_pin_mux_items(pinmuxes, pinmuxes_size))
274 #if defined(CONFIG_SYS_DA850_PLL_INIT)
276 da850_pll_init(davinci_pllc0_regs, CONFIG_SYS_DA850_PLL0_PLLM);
277 da850_pll_init(davinci_pllc1_regs, CONFIG_SYS_DA850_PLL1_PLLM);
279 /* setup CSn config */
280 #if defined(CONFIG_SYS_DA850_CS2CFG)
281 writel(CONFIG_SYS_DA850_CS2CFG, &davinci_emif_regs->ab1cr);
283 #if defined(CONFIG_SYS_DA850_CS3CFG)
284 writel(CONFIG_SYS_DA850_CS3CFG, &davinci_emif_regs->ab2cr);
287 da8xx_configure_lpsc_items(lpsc, lpsc_size);
293 NS16550_init((NS16550_t)(CONFIG_SYS_NS16550_COM1),
294 CONFIG_SYS_NS16550_CLK / 16 / CONFIG_BAUDRATE);
297 * Fix Power and Emulation Management Register
298 * see sprufw3a.pdf page 37 Table 24
300 writel((DAVINCI_UART_PWREMU_MGMT_FREE | DAVINCI_UART_PWREMU_MGMT_URRST |
301 DAVINCI_UART_PWREMU_MGMT_UTRST),
302 #if (CONFIG_SYS_NS16550_COM1 == DAVINCI_UART0_BASE)
303 &davinci_uart0_ctrl_regs->pwremu_mgmt);
305 &davinci_uart2_ctrl_regs->pwremu_mgmt);
308 #if defined(CONFIG_SYS_DA850_DDR_INIT)