1 // SPDX-License-Identifier: GPL-2.0+
3 * SoC-specific lowlevel code for DA850
12 #include <asm/arch/da850_lowlevel.h>
13 #include <asm/arch/hardware.h>
14 #include <asm/arch/davinci_misc.h>
15 #include <asm/arch/ddr2_defs.h>
16 #include <asm/ti-common/davinci_nand.h>
17 #include <asm/arch/pll_defs.h>
19 void davinci_enable_uart0(void)
21 lpsc_on(DAVINCI_LPSC_UART0);
23 /* Bringup UART0 out of reset */
24 REG(UART0_PWREMU_MGMT) = 0x00006001;
27 #if defined(CONFIG_SYS_DA850_PLL_INIT)
28 static void da850_waitloop(unsigned long loopcnt)
32 for (i = 0; i < loopcnt; i++)
36 static int da850_pll_init(struct davinci_pllc_regs *reg, unsigned long pllmult)
38 if (reg == davinci_pllc0_regs)
39 /* Unlock PLL registers. */
40 clrbits_le32(&davinci_syscfg_regs->cfgchip0, PLL_MASTER_LOCK);
43 * Set PLLENSRC '0',bit 5, PLL Enable(PLLEN) selection is controlled
46 clrbits_le32(®->pllctl, PLLCTL_PLLENSRC);
47 /* PLLCTL.EXTCLKSRC bit 9 should be left at 0 for Freon */
48 clrbits_le32(®->pllctl, PLLCTL_EXTCLKSRC);
50 /* Set PLLEN=0 => PLL BYPASS MODE */
51 clrbits_le32(®->pllctl, PLLCTL_PLLEN);
55 if (reg == davinci_pllc0_regs) {
57 * Select the Clock Mode bit 8 as External Clock or On Chip
60 dv_maskbits(®->pllctl, ~PLLCTL_RES_9);
61 setbits_le32(®->pllctl,
62 (CONFIG_SYS_DV_CLKMODE << PLLCTL_CLOCK_MODE_SHIFT));
65 /* Clear PLLRST bit to reset the PLL */
66 clrbits_le32(®->pllctl, PLLCTL_PLLRST);
68 /* Disable the PLL output */
69 setbits_le32(®->pllctl, PLLCTL_PLLDIS);
71 /* PLL initialization sequence */
73 * Power up the PLL- PWRDN bit set to 0 to bring the PLL out of
76 clrbits_le32(®->pllctl, PLLCTL_PLLPWRDN);
78 /* Enable the PLL from Disable Mode PLLDIS bit to 0 */
79 clrbits_le32(®->pllctl, PLLCTL_PLLDIS);
81 #if defined(CONFIG_SYS_DA850_PLL0_PREDIV)
82 /* program the prediv */
83 if (reg == davinci_pllc0_regs && CONFIG_SYS_DA850_PLL0_PREDIV)
84 writel((PLL_DIVEN | CONFIG_SYS_DA850_PLL0_PREDIV),
88 /* Program the required multiplier value in PLLM */
89 writel(pllmult, ®->pllm);
91 /* program the postdiv */
92 if (reg == davinci_pllc0_regs)
93 writel((PLL_POSTDEN | CONFIG_SYS_DA850_PLL0_POSTDIV),
96 writel((PLL_POSTDEN | CONFIG_SYS_DA850_PLL1_POSTDIV),
100 * Check for the GOSTAT bit in PLLSTAT to clear to 0 to indicate that
101 * no GO operation is currently in progress
103 while ((readl(®->pllstat) & PLLCMD_GOSTAT) == PLLCMD_GOSTAT)
106 if (reg == davinci_pllc0_regs) {
107 writel(CONFIG_SYS_DA850_PLL0_PLLDIV1, ®->plldiv1);
108 writel(CONFIG_SYS_DA850_PLL0_PLLDIV2, ®->plldiv2);
109 writel(CONFIG_SYS_DA850_PLL0_PLLDIV3, ®->plldiv3);
110 writel(CONFIG_SYS_DA850_PLL0_PLLDIV4, ®->plldiv4);
111 writel(CONFIG_SYS_DA850_PLL0_PLLDIV5, ®->plldiv5);
112 writel(CONFIG_SYS_DA850_PLL0_PLLDIV6, ®->plldiv6);
113 writel(CONFIG_SYS_DA850_PLL0_PLLDIV7, ®->plldiv7);
115 writel(CONFIG_SYS_DA850_PLL1_PLLDIV1, ®->plldiv1);
116 writel(CONFIG_SYS_DA850_PLL1_PLLDIV2, ®->plldiv2);
117 writel(CONFIG_SYS_DA850_PLL1_PLLDIV3, ®->plldiv3);
121 * Set the GOSET bit in PLLCMD to 1 to initiate a new divider
124 setbits_le32(®->pllcmd, PLLCMD_GOSTAT);
127 * Wait for the GOSTAT bit in PLLSTAT to clear to 0
128 * (completion of phase alignment).
130 while ((readl(®->pllstat) & PLLCMD_GOSTAT) == PLLCMD_GOSTAT)
133 /* Wait for PLL to reset properly. See PLL spec for PLL reset time */
136 /* Set the PLLRST bit in PLLCTL to 1 to bring the PLL out of reset */
137 setbits_le32(®->pllctl, PLLCTL_PLLRST);
139 /* Wait for PLL to lock. See PLL spec for PLL lock time */
140 da850_waitloop(2400);
143 * Set the PLLEN bit in PLLCTL to 1 to remove the PLL from bypass
146 setbits_le32(®->pllctl, PLLCTL_PLLEN);
150 * clear EMIFA and EMIFB clock source settings, let them
153 if (reg == davinci_pllc0_regs)
154 dv_maskbits(&davinci_syscfg_regs->cfgchip3,
155 ~(PLL_SCSCFG3_DIV45PENA | PLL_SCSCFG3_EMA_CLKSRC));
159 #endif /* CONFIG_SYS_DA850_PLL_INIT */
161 #if defined(CONFIG_SYS_DA850_DDR_INIT)
162 static int da850_ddr_setup(void)
166 /* Enable the Clock to DDR2/mDDR */
167 lpsc_on(DAVINCI_LPSC_DDR_EMIF);
169 tmp = readl(&davinci_syscfg1_regs->vtpio_ctl);
170 if ((tmp & VTP_POWERDWN) == VTP_POWERDWN) {
171 /* Begin VTP Calibration */
172 clrbits_le32(&davinci_syscfg1_regs->vtpio_ctl, VTP_POWERDWN);
173 clrbits_le32(&davinci_syscfg1_regs->vtpio_ctl, VTP_LOCK);
174 setbits_le32(&davinci_syscfg1_regs->vtpio_ctl, VTP_CLKRZ);
175 clrbits_le32(&davinci_syscfg1_regs->vtpio_ctl, VTP_CLKRZ);
176 setbits_le32(&davinci_syscfg1_regs->vtpio_ctl, VTP_CLKRZ);
178 /* Polling READY bit to see when VTP calibration is done */
179 tmp = readl(&davinci_syscfg1_regs->vtpio_ctl);
180 while ((tmp & VTP_READY) != VTP_READY)
181 tmp = readl(&davinci_syscfg1_regs->vtpio_ctl);
183 setbits_le32(&davinci_syscfg1_regs->vtpio_ctl, VTP_LOCK);
184 setbits_le32(&davinci_syscfg1_regs->vtpio_ctl, VTP_POWERDWN);
186 setbits_le32(&davinci_syscfg1_regs->vtpio_ctl, VTP_IOPWRDWN);
187 writel(CONFIG_SYS_DA850_DDR2_DDRPHYCR, &dv_ddr2_regs_ctrl->ddrphycr);
189 if (CONFIG_SYS_DA850_DDR2_SDBCR & (1 << DV_DDR_SDCR_DDR2EN_SHIFT)) {
191 clrbits_le32(&davinci_syscfg1_regs->ddr_slew,
192 (1 << DDR_SLEW_DDR_PDENA_BIT) |
193 (1 << DDR_SLEW_CMOSEN_BIT));
196 setbits_le32(&davinci_syscfg1_regs->ddr_slew,
197 (1 << DDR_SLEW_DDR_PDENA_BIT) |
198 (1 << DDR_SLEW_CMOSEN_BIT));
202 * SDRAM Configuration Register (SDCR):
203 * First set the BOOTUNLOCK bit to make configuration bits
206 setbits_le32(&dv_ddr2_regs_ctrl->sdbcr, DV_DDR_BOOTUNLOCK);
209 * Write the new value of these bits and clear BOOTUNLOCK.
210 * At the same time, set the TIMUNLOCK bit to allow changing
211 * the timing registers
213 tmp = CONFIG_SYS_DA850_DDR2_SDBCR;
214 tmp &= ~DV_DDR_BOOTUNLOCK;
215 tmp |= DV_DDR_TIMUNLOCK;
216 writel(tmp, &dv_ddr2_regs_ctrl->sdbcr);
218 /* write memory configuration and timing */
219 if (!(CONFIG_SYS_DA850_DDR2_SDBCR & (1 << DV_DDR_SDCR_DDR2EN_SHIFT))) {
221 writel(CONFIG_SYS_DA850_DDR2_SDBCR2,
222 &dv_ddr2_regs_ctrl->sdbcr2);
224 writel(CONFIG_SYS_DA850_DDR2_SDTIMR, &dv_ddr2_regs_ctrl->sdtimr);
225 writel(CONFIG_SYS_DA850_DDR2_SDTIMR2, &dv_ddr2_regs_ctrl->sdtimr2);
227 /* clear the TIMUNLOCK bit and write the value of the CL field */
228 tmp &= ~DV_DDR_TIMUNLOCK;
229 writel(tmp, &dv_ddr2_regs_ctrl->sdbcr);
232 * LPMODEN and MCLKSTOPEN must be set!
233 * Without this bits set, PSC don;t switch states !!
235 writel(CONFIG_SYS_DA850_DDR2_SDRCR |
236 (1 << DV_DDR_SRCR_LPMODEN_SHIFT) |
237 (1 << DV_DDR_SRCR_MCLKSTOPEN_SHIFT),
238 &dv_ddr2_regs_ctrl->sdrcr);
240 /* SyncReset the Clock to EMIF3A SDRAM */
241 lpsc_syncreset(DAVINCI_LPSC_DDR_EMIF);
242 /* Enable the Clock to EMIF3A SDRAM */
243 lpsc_on(DAVINCI_LPSC_DDR_EMIF);
245 /* disable self refresh */
246 clrbits_le32(&dv_ddr2_regs_ctrl->sdrcr,
247 DV_DDR_SDRCR_LPMODEN | DV_DDR_SDRCR_MCLKSTOPEN);
248 writel(CONFIG_SYS_DA850_DDR2_PBBPR, &dv_ddr2_regs_ctrl->pbbpr);
252 #endif /* CONFIG_SYS_DA850_DDR_INIT */
254 __attribute__((weak))
255 void board_gpio_init(void)
260 int arch_cpu_init(void)
262 /* Unlock kick registers */
263 writel(DV_SYSCFG_KICK0_UNLOCK, &davinci_syscfg_regs->kick0);
264 writel(DV_SYSCFG_KICK1_UNLOCK, &davinci_syscfg_regs->kick1);
266 dv_maskbits(&davinci_syscfg_regs->suspsrc,
267 CONFIG_SYS_DA850_SYSCFG_SUSPSRC);
269 /* configure pinmux settings */
270 if (davinci_configure_pin_mux_items(pinmuxes, pinmuxes_size))
273 #if defined(CONFIG_SYS_DA850_PLL_INIT)
275 da850_pll_init(davinci_pllc0_regs, CONFIG_SYS_DA850_PLL0_PLLM);
276 da850_pll_init(davinci_pllc1_regs, CONFIG_SYS_DA850_PLL1_PLLM);
278 /* setup CSn config */
279 #if defined(CONFIG_SYS_DA850_CS2CFG)
280 writel(CONFIG_SYS_DA850_CS2CFG, &davinci_emif_regs->ab1cr);
282 #if defined(CONFIG_SYS_DA850_CS3CFG)
283 writel(CONFIG_SYS_DA850_CS3CFG, &davinci_emif_regs->ab2cr);
286 da8xx_configure_lpsc_items(lpsc, lpsc_size);
291 #if !CONFIG_IS_ENABLED(DM_SERIAL)
292 NS16550_init((NS16550_t)(CONFIG_SYS_NS16550_COM1),
293 CONFIG_SYS_NS16550_CLK / 16 / CONFIG_BAUDRATE);
296 * Fix Power and Emulation Management Register
297 * see sprufw3a.pdf page 37 Table 24
299 writel((DAVINCI_UART_PWREMU_MGMT_FREE | DAVINCI_UART_PWREMU_MGMT_URRST |
300 DAVINCI_UART_PWREMU_MGMT_UTRST),
301 #if (CONFIG_SYS_NS16550_COM1 == DAVINCI_UART0_BASE)
302 &davinci_uart0_ctrl_regs->pwremu_mgmt);
304 &davinci_uart2_ctrl_regs->pwremu_mgmt);
307 #if defined(CONFIG_SYS_DA850_DDR_INIT)