#include <config.h>
#include <asm/blackfin.h>
#include <asm/mach-common/bits/bootrom.h>
+#include <asm/mach-common/bits/core.h>
#include <asm/mach-common/bits/ebiu.h>
#include <asm/mach-common/bits/pll.h>
#include <asm/mach-common/bits/uart.h>
#include "serial.h"
__attribute__((always_inline))
-static inline uint32_t serial_init(void)
+static inline void serial_init(void)
{
#ifdef __ADSPBF54x__
# ifdef BFIN_BOOT_UART_USE_RTS
}
#endif
- uint32_t old_baud = serial_early_get_baud();
-
if (BFIN_DEBUG_EARLY_SERIAL) {
+ int ucen = *pUART_GCTL & UCEN;
serial_early_init();
/* If the UART is off, that means we need to program
* the baud rate ourselves initially.
*/
- if (!old_baud) {
- old_baud = CONFIG_BAUDRATE;
+ if (ucen != UCEN)
serial_early_set_baud(CONFIG_BAUDRATE);
- }
}
-
- return old_baud;
}
__attribute__((always_inline))
#endif
}
-/* We need to reset the baud rate when we have early debug turned on
- * or when we are booting over the UART.
- * XXX: we should fix this to calc the old baud and restore it rather
- * than hardcoding it via CONFIG_LDR_LOAD_BAUD ... but we have
- * to figure out how to avoid the division in the baud calc ...
- */
-__attribute__((always_inline))
-static inline void serial_reset_baud(uint32_t baud)
-{
- if (!BFIN_DEBUG_EARLY_SERIAL && CONFIG_BFIN_BOOT_MODE != BFIN_BOOT_UART)
- return;
-
-#ifndef CONFIG_LDR_LOAD_BAUD
-# define CONFIG_LDR_LOAD_BAUD 115200
-#endif
-
- if (CONFIG_BFIN_BOOT_MODE == BFIN_BOOT_BYPASS)
- serial_early_set_baud(baud);
- else if (CONFIG_BFIN_BOOT_MODE == BFIN_BOOT_UART)
- serial_early_set_baud(CONFIG_LDR_LOAD_BAUD);
- else
- serial_early_set_baud(CONFIG_BAUDRATE);
-}
-
__attribute__((always_inline))
static inline void serial_putc(char c)
{
return;
if (c == '\n')
- *pUART_THR = '\r';
+ serial_putc('\r');
*pUART_THR = c;
}
-/* Max SCLK can be 133MHz ... dividing that by 4 gives
- * us a freq of 33MHz for SPI which should generally be
+/* Max SCLK can be 133MHz ... dividing that by (2*4) gives
+ * us a freq of 16MHz for SPI which should generally be
* slow enough for the slow reads the bootrom uses.
*/
+#if !defined(CONFIG_SPI_FLASH_SLOW_READ) && \
+ ((defined(__ADSPBF52x__) && __SILICON_REVISION__ >= 2) || \
+ (defined(__ADSPBF54x__) && __SILICON_REVISION__ >= 1))
+# define BOOTROM_SUPPORTS_SPI_FAST_READ 1
+#else
+# define BOOTROM_SUPPORTS_SPI_FAST_READ 0
+#endif
#ifndef CONFIG_SPI_BAUD_INITBLOCK
-# define CONFIG_SPI_BAUD_INITBLOCK 4
+# define CONFIG_SPI_BAUD_INITBLOCK (BOOTROM_SUPPORTS_SPI_FAST_READ ? 2 : 4)
+#endif
+#ifdef SPI0_BAUD
+# define bfin_write_SPI_BAUD bfin_write_SPI0_BAUD
#endif
/* PLL_DIV defines */
#endif
#ifndef CONFIG_PLL_CTL_VAL
-# define CONFIG_PLL_CTL_VAL (SPORT_HYST | (CONFIG_VCO_MULT << 9))
+# define CONFIG_PLL_CTL_VAL (SPORT_HYST | (CONFIG_VCO_MULT << 9) | CONFIG_CLKIN_HALF)
#endif
#ifndef CONFIG_EBIU_RSTCTL_VAL
# define CONFIG_EBIU_RSTCTL_VAL 0 /* only MDDRENABLE is useful */
#endif
+#if ((CONFIG_EBIU_RSTCTL_VAL & 0xFFFFFFC4) != 0)
+# error invalid EBIU_RSTCTL value: must not set reserved bits
+#endif
#ifndef CONFIG_EBIU_MBSCTL_VAL
# define CONFIG_EBIU_MBSCTL_VAL 0
#endif
+#if defined(CONFIG_EBIU_DDRQUE_VAL) && ((CONFIG_EBIU_DDRQUE_VAL & 0xFFFF8000) != 0)
+# error invalid EBIU_DDRQUE value: must not set reserved bits
+#endif
+
/* Make sure our voltage value is sane so we don't blow up! */
#ifndef CONFIG_VR_CTL_VAL
# define BFIN_CCLK ((CONFIG_CLKIN_HZ * CONFIG_VCO_MULT) / CONFIG_CCLK_DIV)
# elif defined(__ADSPBF54x__) /* TBD; use default */
# undef CONFIG_VR_CTL_VLEV
# define CONFIG_VR_CTL_VLEV VLEV_120
+# elif defined(__ADSPBF538__) || defined(__ADSPBF539__) /* TBD; use default */
+# undef CONFIG_VR_CTL_VLEV
+# define CONFIG_VR_CTL_VLEV VLEV_125
# endif
# ifdef CONFIG_BFIN_MAC
# define CONFIG_VR_CTL_VAL (CONFIG_VR_CTL_CLKBUF | CONFIG_VR_CTL_VLEV | CONFIG_VR_CTL_FREQ)
#endif
-__attribute__((saveall))
+/* some parts do not have an on-chip voltage regulator */
+#if defined(__ADSPBF51x__)
+# define CONFIG_HAS_VR 0
+# undef CONFIG_VR_CTL_VAL
+# define CONFIG_VR_CTL_VAL 0
+#else
+# define CONFIG_HAS_VR 1
+#endif
+
+#ifndef EBIU_RSTCTL
+/* Blackfin with SDRAM */
+#ifndef CONFIG_EBIU_SDBCTL_VAL
+# if CONFIG_MEM_SIZE == 16
+# define CONFIG_EBSZ_VAL EBSZ_16
+# elif CONFIG_MEM_SIZE == 32
+# define CONFIG_EBSZ_VAL EBSZ_32
+# elif CONFIG_MEM_SIZE == 64
+# define CONFIG_EBSZ_VAL EBSZ_64
+# elif CONFIG_MEM_SIZE == 128
+# define CONFIG_EBSZ_VAL EBSZ_128
+# elif CONFIG_MEM_SIZE == 256
+# define CONFIG_EBSZ_VAL EBSZ_256
+# elif CONFIG_MEM_SIZE == 512
+# define CONFIG_EBSZ_VAL EBSZ_512
+# else
+# error You need to define CONFIG_EBIU_SDBCTL_VAL or CONFIG_MEM_SIZE
+# endif
+# if CONFIG_MEM_ADD_WDTH == 8
+# define CONFIG_EBCAW_VAL EBCAW_8
+# elif CONFIG_MEM_ADD_WDTH == 9
+# define CONFIG_EBCAW_VAL EBCAW_9
+# elif CONFIG_MEM_ADD_WDTH == 10
+# define CONFIG_EBCAW_VAL EBCAW_10
+# elif CONFIG_MEM_ADD_WDTH == 11
+# define CONFIG_EBCAW_VAL EBCAW_11
+# else
+# error You need to define CONFIG_EBIU_SDBCTL_VAL or CONFIG_MEM_ADD_WDTH
+# endif
+# define CONFIG_EBIU_SDBCTL_VAL (CONFIG_EBCAW_VAL | CONFIG_EBSZ_VAL | EBE)
+#endif
+#endif
+
+/* Conflicting Column Address Widths Causes SDRAM Errors:
+ * EB2CAW and EB3CAW must be the same
+ */
+#if ANOMALY_05000362
+# if ((CONFIG_EBIU_SDBCTL_VAL & 0x30000000) >> 8) != (CONFIG_EBIU_SDBCTL_VAL & 0x00300000)
+# error "Anomaly 05000362: EB2CAW and EB3CAW must be the same"
+# endif
+#endif
+
+BOOTROM_CALLED_FUNC_ATTR
void initcode(ADI_BOOT_DATA *bootstruct)
{
- uint32_t old_baud = serial_init();
+ ADI_BOOT_DATA bootstruct_scratch;
+
+ /* Save the clock pieces that are used in baud rate calculation */
+ unsigned int sdivB, divB, vcoB;
+ serial_init();
+ if (BFIN_DEBUG_EARLY_SERIAL || CONFIG_BFIN_BOOT_MODE == BFIN_BOOT_UART) {
+ sdivB = bfin_read_PLL_DIV() & 0xf;
+ vcoB = (bfin_read_PLL_CTL() >> 9) & 0x3f;
+ divB = serial_early_get_div();
+ }
+
+ serial_putc('A');
+
+ /* If the bootstruct is NULL, then it's because we're loading
+ * dynamically and not via LDR (bootrom). So set the struct to
+ * some scratch space.
+ */
+ if (!bootstruct)
+ bootstruct = &bootstruct_scratch;
#ifdef CONFIG_HW_WATCHDOG
# ifndef CONFIG_HW_WATCHDOG_TIMEOUT_INITCODE
}
#endif
- serial_putc('S');
+ serial_putc('B');
+
+ /* If external memory is enabled, put it into self refresh first. */
+ bool put_into_srfs = false;
+#ifdef EBIU_RSTCTL
+ if (bfin_read_EBIU_RSTCTL() & DDR_SRESET) {
+ bfin_write_EBIU_RSTCTL(bfin_read_EBIU_RSTCTL() | SRREQ);
+ put_into_srfs = true;
+ }
+#else
+ if (bfin_read_EBIU_SDBCTL() & EBE) {
+ bfin_write_EBIU_SDGCTL(bfin_read_EBIU_SDGCTL() | SRFS);
+ put_into_srfs = true;
+ }
+#endif
+
+ serial_putc('C');
/* Blackfin bootroms use the SPI slow read opcode instead of the SPI
* fast read, so we need to slow down the SPI clock a lot more during
* boot. Once we switch over to u-boot's SPI flash driver, we'll
* increase the speed appropriately.
*/
- if (CONFIG_BFIN_BOOT_MODE == BFIN_BOOT_SPI_MASTER)
-#ifdef SPI0_BAUD
- bfin_write_SPI0_BAUD(CONFIG_SPI_BAUD_INITBLOCK);
-#else
+ if (CONFIG_BFIN_BOOT_MODE == BFIN_BOOT_SPI_MASTER) {
+ if (BOOTROM_SUPPORTS_SPI_FAST_READ && CONFIG_SPI_BAUD_INITBLOCK < 4)
+ bootstruct->dFlags |= BFLAG_FASTREAD;
bfin_write_SPI_BAUD(CONFIG_SPI_BAUD_INITBLOCK);
+ }
+
+ serial_putc('D');
+
+ /* If we're entering self refresh, make sure it has happened. */
+ if (put_into_srfs)
+#ifdef EBIU_RSTCTL
+ while (!(bfin_read_EBIU_RSTCTL() & SRACK))
+#else
+ while (!(bfin_read_EBIU_SDSTAT() & SDSRA))
#endif
+ continue;
- serial_putc('B');
+ serial_putc('E');
+
+ /* With newer bootroms, we use the helper function to set up
+ * the memory controller. Older bootroms lacks such helpers
+ * so we do it ourselves.
+ */
+ uint16_t vr_ctl = bfin_read_VR_CTL();
+ if (!ANOMALY_05000386) {
+ serial_putc('F');
+
+ /* Always programming PLL_LOCKCNT avoids Anomaly 05000430 */
+ ADI_SYSCTRL_VALUES memory_settings;
+ uint32_t actions = SYSCTRL_WRITE | SYSCTRL_PLLCTL | SYSCTRL_PLLDIV | SYSCTRL_LOCKCNT;
+ if (CONFIG_HAS_VR) {
+ actions |= SYSCTRL_VRCTL;
+ if (CONFIG_VR_CTL_VAL & FREQ_MASK)
+ actions |= SYSCTRL_INTVOLTAGE;
+ else
+ actions |= SYSCTRL_EXTVOLTAGE;
+ memory_settings.uwVrCtl = CONFIG_VR_CTL_VAL;
+ } else
+ actions |= SYSCTRL_EXTVOLTAGE;
+ memory_settings.uwPllCtl = CONFIG_PLL_CTL_VAL;
+ memory_settings.uwPllDiv = CONFIG_PLL_DIV_VAL;
+ memory_settings.uwPllLockCnt = CONFIG_PLL_LOCKCNT_VAL;
+#if ANOMALY_05000432
+ bfin_write_SIC_IWR1(0);
+#endif
+ bfrom_SysControl(actions, &memory_settings, NULL);
+#if ANOMALY_05000432
+ bfin_write_SIC_IWR1(-1);
+#endif
+#if ANOMALY_05000171
+ bfin_write_SICA_IWR0(-1);
+ bfin_write_SICA_IWR1(-1);
+#endif
+ } else {
+ serial_putc('G');
- /* Disable all peripheral wakeups except for the PLL event. */
+ /* Disable all peripheral wakeups except for the PLL event. */
#ifdef SIC_IWR0
- bfin_write_SIC_IWR0(1);
- bfin_write_SIC_IWR1(0);
+ bfin_write_SIC_IWR0(1);
+ bfin_write_SIC_IWR1(0);
# ifdef SIC_IWR2
- bfin_write_SIC_IWR2(0);
+ bfin_write_SIC_IWR2(0);
# endif
#elif defined(SICA_IWR0)
- bfin_write_SICA_IWR0(1);
- bfin_write_SICA_IWR1(0);
+ bfin_write_SICA_IWR0(1);
+ bfin_write_SICA_IWR1(0);
#else
- bfin_write_SIC_IWR(1);
+ bfin_write_SIC_IWR(1);
#endif
- serial_putc('L');
+ serial_putc('H');
- bfin_write_PLL_LOCKCNT(CONFIG_PLL_LOCKCNT_VAL);
+ /* Always programming PLL_LOCKCNT avoids Anomaly 05000430 */
+ bfin_write_PLL_LOCKCNT(CONFIG_PLL_LOCKCNT_VAL);
- serial_putc('A');
+ serial_putc('I');
- /* Only reprogram when needed to avoid triggering unnecessary
- * PLL relock sequences.
- */
- if (bfin_read_VR_CTL() != CONFIG_VR_CTL_VAL) {
- serial_putc('!');
- bfin_write_VR_CTL(CONFIG_VR_CTL_VAL);
- asm("idle;");
- }
+ /* Only reprogram when needed to avoid triggering unnecessary
+ * PLL relock sequences.
+ */
+ if (vr_ctl != CONFIG_VR_CTL_VAL) {
+ serial_putc('!');
+ bfin_write_VR_CTL(CONFIG_VR_CTL_VAL);
+ asm("idle;");
+ }
- serial_putc('C');
+ serial_putc('J');
- bfin_write_PLL_DIV(CONFIG_PLL_DIV_VAL);
+ bfin_write_PLL_DIV(CONFIG_PLL_DIV_VAL);
- serial_putc('K');
+ serial_putc('K');
- /* Only reprogram when needed to avoid triggering unnecessary
- * PLL relock sequences.
- */
- if (bfin_read_PLL_CTL() != CONFIG_PLL_CTL_VAL) {
- serial_putc('!');
- bfin_write_PLL_CTL(CONFIG_PLL_CTL_VAL);
- asm("idle;");
+ /* Only reprogram when needed to avoid triggering unnecessary
+ * PLL relock sequences.
+ */
+ if (ANOMALY_05000242 || bfin_read_PLL_CTL() != CONFIG_PLL_CTL_VAL) {
+ serial_putc('!');
+ bfin_write_PLL_CTL(CONFIG_PLL_CTL_VAL);
+ asm("idle;");
+ }
+
+ serial_putc('L');
+
+ /* Restore all peripheral wakeups. */
+#ifdef SIC_IWR0
+ bfin_write_SIC_IWR0(-1);
+ bfin_write_SIC_IWR1(-1);
+# ifdef SIC_IWR2
+ bfin_write_SIC_IWR2(-1);
+# endif
+#elif defined(SICA_IWR0)
+ bfin_write_SICA_IWR0(-1);
+ bfin_write_SICA_IWR1(-1);
+#else
+ bfin_write_SIC_IWR(-1);
+#endif
}
+ serial_putc('M');
+
/* Since we've changed the SCLK above, we may need to update
* the UART divisors (UART baud rates are based on SCLK).
+ * Do the division by hand as there are no native instructions
+ * for dividing which means we'd generate a libgcc reference.
*/
- serial_reset_baud(old_baud);
+ if (CONFIG_BFIN_BOOT_MODE == BFIN_BOOT_UART) {
+ unsigned int sdivR, vcoR;
+ sdivR = bfin_read_PLL_DIV() & 0xf;
+ vcoR = (bfin_read_PLL_CTL() >> 9) & 0x3f;
+ int dividend = sdivB * divB * vcoR;
+ int divisor = vcoB * sdivR;
+ unsigned int quotient;
+ for (quotient = 0; dividend > 0; ++quotient)
+ dividend -= divisor;
+ serial_early_put_div(quotient - ANOMALY_05000230);
+ }
- serial_putc('F');
+ serial_putc('N');
- /* Program the async banks controller. */
- bfin_write_EBIU_AMBCTL0(CONFIG_EBIU_AMBCTL0_VAL);
- bfin_write_EBIU_AMBCTL1(CONFIG_EBIU_AMBCTL1_VAL);
- bfin_write_EBIU_AMGCTL(CONFIG_EBIU_AMGCTL_VAL);
+ /* Program the external memory controller before we come out of
+ * self-refresh. This only works with our SDRAM controller.
+ */
+#ifndef EBIU_RSTCTL
+ bfin_write_EBIU_SDRRC(CONFIG_EBIU_SDRRC_VAL);
+ bfin_write_EBIU_SDBCTL(CONFIG_EBIU_SDBCTL_VAL);
+ bfin_write_EBIU_SDGCTL(CONFIG_EBIU_SDGCTL_VAL);
+#endif
-#ifdef EBIU_MODE
- /* Not all parts have these additional MMRs. */
- bfin_write_EBIU_MBSCTL(CONFIG_EBIU_MBSCTL_VAL);
- bfin_write_EBIU_MODE(CONFIG_EBIU_MODE_VAL);
- bfin_write_EBIU_FCTL(CONFIG_EBIU_FCTL_VAL);
+ serial_putc('O');
+
+ /* Now that we've reprogrammed, take things out of self refresh. */
+ if (put_into_srfs)
+#ifdef EBIU_RSTCTL
+ bfin_write_EBIU_RSTCTL(bfin_read_EBIU_RSTCTL() & ~(SRREQ));
+#else
+ bfin_write_EBIU_SDGCTL(bfin_read_EBIU_SDGCTL() & ~(SRFS));
#endif
- serial_putc('I');
+ serial_putc('P');
- /* Program the external memory controller. */
+ /* Our DDR controller sucks and cannot be programmed while in
+ * self-refresh. So we have to pull it out before programming.
+ */
#ifdef EBIU_RSTCTL
bfin_write_EBIU_RSTCTL(bfin_read_EBIU_RSTCTL() | 0x1 /*DDRSRESET*/ | CONFIG_EBIU_RSTCTL_VAL);
bfin_write_EBIU_DDRCTL0(CONFIG_EBIU_DDRCTL0_VAL);
/* default is disable, so don't need to force this */
bfin_write_EBIU_DDRCTL3(CONFIG_EBIU_DDRCTL3_VAL);
# endif
-#else
- bfin_write_EBIU_SDRRC(CONFIG_EBIU_SDRRC_VAL);
- bfin_write_EBIU_SDBCTL(CONFIG_EBIU_SDBCTL_VAL);
- bfin_write_EBIU_SDGCTL(CONFIG_EBIU_SDGCTL_VAL);
+# ifdef CONFIG_EBIU_DDRQUE_VAL
+ bfin_write_EBIU_DDRQUE(bfin_read_EBIU_DDRQUE() | CONFIG_EBIU_DDRQUE_VAL);
+# endif
#endif
- serial_putc('N');
+ serial_putc('Q');
- /* Restore all peripheral wakeups. */
-#ifdef SIC_IWR0
- bfin_write_SIC_IWR0(-1);
- bfin_write_SIC_IWR1(-1);
-# ifdef SIC_IWR2
- bfin_write_SIC_IWR2(-1);
-# endif
-#elif defined(SICA_IWR0)
- bfin_write_SICA_IWR0(-1);
- bfin_write_SICA_IWR1(-1);
-#else
- bfin_write_SIC_IWR(-1);
+ /* Are we coming out of hibernate (suspend to memory) ?
+ * The memory layout is:
+ * 0x0: hibernate magic for anomaly 307 (0xDEADBEEF)
+ * 0x4: return address
+ * 0x8: stack pointer
+ *
+ * SCKELOW is unreliable on older parts (anomaly 307)
+ */
+ if (ANOMALY_05000307 || vr_ctl & 0x8000) {
+ uint32_t *hibernate_magic = 0;
+ __builtin_bfin_ssync(); /* make sure memory controller is done */
+ if (hibernate_magic[0] == 0xDEADBEEF) {
+ serial_putc('R');
+ bfin_write_EVT15(hibernate_magic[1]);
+ bfin_write_IMASK(EVT_IVG15);
+ __asm__ __volatile__ (
+ /* load reti early to avoid anomaly 281 */
+ "reti = %0;"
+ /* clear hibernate magic */
+ "[%0] = %1;"
+ /* load stack pointer */
+ "SP = [%0 + 8];"
+ /* lower ourselves from reset ivg to ivg15 */
+ "raise 15;"
+ "rti;"
+ :
+ : "p"(hibernate_magic), "d"(0x2000 /* jump.s 0 */)
+ );
+ }
+ }
+
+ serial_putc('S');
+
+ /* Program the async banks controller. */
+ bfin_write_EBIU_AMBCTL0(CONFIG_EBIU_AMBCTL0_VAL);
+ bfin_write_EBIU_AMBCTL1(CONFIG_EBIU_AMBCTL1_VAL);
+ bfin_write_EBIU_AMGCTL(CONFIG_EBIU_AMGCTL_VAL);
+
+#ifdef EBIU_MODE
+ /* Not all parts have these additional MMRs. */
+ bfin_write_EBIU_MBSCTL(CONFIG_EBIU_MBSCTL_VAL);
+ bfin_write_EBIU_MODE(CONFIG_EBIU_MODE_VAL);
+ bfin_write_EBIU_FCTL(CONFIG_EBIU_FCTL_VAL);
#endif
+ serial_putc('T');
+
+ /* tell the bootrom where our entry point is */
+ if (CONFIG_BFIN_BOOT_MODE != BFIN_BOOT_BYPASS)
+ bfin_write_EVT1(CONFIG_SYS_MONITOR_BASE);
+
serial_putc('>');
serial_putc('\n');
projects / karo-tx-uboot.git / blobdiff