static uint32_t get_io_pll_freq(void)
{
LTRACEF("IO_PLL_CTRL 0x%x\n", SLCR_REG(IO_PLL_CTRL));
// XXX test that the pll is actually enabled
uint32_t fdiv = BITS_SHIFT(SLCR_REG(IO_PLL_CTRL), 18, 12);
return EXTERNAL_CLOCK_FREQ * fdiv;
}
void platform_init(void)
{
uart_init();
/* enable if we want to see some hardware boot status */
#if 0
printf("zynq boot status:\n");
printf("\tREBOOT_STATUS 0x%x\n", SLCR_REG(REBOOT_STATUS));
printf("\tBOOT_MODE 0x%x\n", SLCR_REG(BOOT_MODE));
zynq_dump_clocks();
#endif
}
void platform_early_init(void)
{
zynq_mio_init();
zynq_pll_init();
zynq_clk_init();
#if ZYNQ_SDRAM_INIT
zynq_ddr_init();
#endif
zynq_slcr_unlock();
/* Enable all level shifters */
SLCR_REG(LVL_SHFTR_EN) = 0xF;
/* FPGA SW reset (not documented, but mandatory) */
SLCR_REG(FPGA_RST_CTRL) = 0x0;
/* zynq manual says this is mandatory for cache init */
*REG32(SLCR_BASE + 0xa1c) = 0x020202;
zynq_slcr_lock();
/* early initialize the uart so we can printf */
uart_init_early();
/* initialize the interrupt controller */
arm_gic_init();
/* initialize the timer block */
arm_cortex_a9_timer_init(CPUPRIV_BASE, zynq_get_arm_timer_freq());
/* add the main memory arena */
#if !ZYNQ_CODE_IN_SDRAM && SDRAM_SIZE != 0
/* In the case of running from SRAM, and we are using SDRAM,
* there is a discontinuity between the end of SRAM (256K) and the start of SDRAM (1MB),
* so intentionally bump the boot-time allocator to start in the base of SDRAM.
*/
extern uintptr_t boot_alloc_start;
extern uintptr_t boot_alloc_end;
boot_alloc_start = KERNEL_BASE + MB;
boot_alloc_end = KERNEL_BASE + MB;
#endif
#if SDRAM_SIZE != 0
pmm_add_arena(&sdram_arena);
#endif
pmm_add_arena(&sram_arena);
}
int zynq_mio_init(void)
{
/* This DDRIOB configuration applies to both zybo and uzed, but it's possible
* it may not work for all boards in the future. Just something to keep in mind
* with different memory configurations.
*/
SLCR_REG(GPIOB_CTRL) = GPIOB_CTRL_VREF_EN;
for (size_t pin = 0; pin < countof(zynq_mio_cfg); pin++) {
if (zynq_mio_cfg[pin] != MIO_DEFAULT) {
SLCR_REG(MIO_PIN_00 + (pin * 4)) = zynq_mio_cfg[pin];
}
}
SLCR_REG(SD0_WP_CD_SEL) = SDIO0_WP_SEL(0x37) | SDIO0_CD_SEL(0x2F);
return 0;
}
static inline int pll_poll(uint32_t mask)
{
uint32_t iters = UINT_MAX;
while (iters-- && !(SLCR_REG(PLL_STATUS) & mask)) ;
if (iters) {
return 0;
}
return -1;
}
void platform_quiesce(void)
{
#if ZYNQ_WITH_GEM_ETH
gem_disable();
#endif
platform_stop_timer();
/* stop the 2nd cpu and hold in reset */
SLCR_REG(A9_CPU_RST_CTRL) |= (1<<1); // reset cpu 1
}
void platform_init(void)
{
uart_init();
/* enable if we want to see some hardware boot status */
#if 0
printf("zynq boot status:\n");
printf("\tREBOOT_STATUS 0x%x\n", SLCR_REG(REBOOT_STATUS));
printf("\tBOOT_MODE 0x%x\n", SLCR_REG(BOOT_MODE));
zynq_dump_clocks();
printf("zynq mio:\n");
for (size_t i = 0; i < 54; i++) {
printf("\t%02u: 0x%08x", i, *REG32((uintptr_t)&SLCR->MIO_PIN_00 + (i * 4)));
if (i % 4 == 3 || i == 53) {
putchar('\n');
}
}
#endif
gem_init(GEM0_BASE, 256*1024);
}
static uint32_t get_cpu_input_freq(void)
{
LTRACEF("ARM_CLK_CTRL 0x%x\n", SLCR_REG(ARM_CLK_CTRL));
uint32_t divisor = BITS_SHIFT(SLCR_REG(ARM_CLK_CTRL), 13, 8);
uint32_t srcsel = BITS_SHIFT(SLCR_REG(ARM_CLK_CTRL), 5, 4);
uint32_t srcclk;
switch (srcsel) {
default: case 0: case 1: // arm pll
srcclk = get_arm_pll_freq();
break;
case 2: // ddr pll
srcclk = get_ddr_pll_freq();
break;
case 3: // io pll
srcclk = get_io_pll_freq();
break;
}
// cpu 6x4x
return srcclk / divisor;
}
static uint32_t get_cpu_1x_freq(void)
{
// cpu 1x is either /6 or /4 the speed of 6x4x
return get_cpu_input_freq() / ((SLCR_REG(CLK_621_TRUE) & 1) ? 6 : 4);
}
static uint32_t get_cpu_2x_freq(void)
{
// cpu 2x is either /3 or /2 the speed of 6x4x
return get_cpu_input_freq() / ((SLCR_REG(CLK_621_TRUE) & 1) ? 3 : 2);
}
void zynq_clk_init(void)
{
zynq_slcr_unlock();
SLCR_REG(DCI_CLK_CTRL) = zynq_clk_cfg.dci_clk;
SLCR_REG(GEM0_CLK_CTRL) = zynq_clk_cfg.gem0_clk;
SLCR_REG(GEM0_RCLK_CTRL) = zynq_clk_cfg.gem0_rclk;
SLCR_REG(GEM1_CLK_CTRL) = zynq_clk_cfg.gem1_clk;
SLCR_REG(GEM1_RCLK_CTRL) = zynq_clk_cfg.gem1_rclk;
SLCR_REG(LQSPI_CLK_CTRL) = zynq_clk_cfg.lqspi_clk;
SLCR_REG(SDIO_CLK_CTRL) = zynq_clk_cfg.sdio_clk;
SLCR_REG(UART_CLK_CTRL) = zynq_clk_cfg.uart_clk;
SLCR_REG(PCAP_CLK_CTRL) = zynq_clk_cfg.pcap_clk;
SLCR_REG(FPGA0_CLK_CTRL) = zynq_clk_cfg.fpga0_clk;
SLCR_REG(FPGA1_CLK_CTRL) = zynq_clk_cfg.fpga1_clk;
SLCR_REG(FPGA2_CLK_CTRL) = zynq_clk_cfg.fpga2_clk;
SLCR_REG(FPGA3_CLK_CTRL) = zynq_clk_cfg.fpga3_clk;
SLCR_REG(APER_CLK_CTRL) = zynq_clk_cfg.aper_clk;
SLCR_REG(CLK_621_TRUE) = zynq_clk_cfg.clk_621_true;
zynq_slcr_lock();
}
void platform_early_init(void)
{
#if 0
ps7_init();
#else
/* Unlock the registers and leave them that way */
zynq_slcr_unlock();
zynq_mio_init();
zynq_pll_init();
zynq_clk_init();
#if ZYNQ_SDRAM_INIT
zynq_ddr_init();
#endif
#endif
/* Enable all level shifters */
SLCR_REG(LVL_SHFTR_EN) = 0xF;
/* FPGA SW reset (not documented, but mandatory) */
SLCR_REG(FPGA_RST_CTRL) = 0x0;
/* zynq manual says this is mandatory for cache init */
*REG32(SLCR_BASE + 0xa1c) = 0x020202;
/* early initialize the uart so we can printf */
uart_init_early();
/* initialize the interrupt controller */
arm_gic_init();
zynq_gpio_init();
/* initialize the timer block */
arm_cortex_a9_timer_init(CPUPRIV_BASE, zynq_get_arm_timer_freq());
/* bump the 2nd cpu into our code space and remap the top SRAM block */
if (KERNEL_LOAD_OFFSET != 0) {
/* construct a trampoline to get the 2nd cpu up to the trap routine */
/* figure out the offset of the trampoline routine in physical space from address 0 */
extern void platform_reset(void);
addr_t tramp = (addr_t)&platform_reset;
tramp -= KERNEL_BASE;
tramp += MEMBASE;
/* stuff in a ldr pc, [nextaddrress], and a target address */
uint32_t *ptr = (uint32_t *)KERNEL_BASE;
ptr[0] = 0xe51ff004; // ldr pc, [pc, #-4]
ptr[1] = tramp;
arch_clean_invalidate_cache_range((addr_t)ptr, 8);
}
/* reset the 2nd cpu, letting it go through its reset vector (at 0x0 physical) */
SLCR_REG(A9_CPU_RST_CTRL) |= (1<<1); // reset cpu 1
spin(10);
SLCR_REG(A9_CPU_RST_CTRL) &= ~(1<<1); // unreset cpu 1
/* wait for the 2nd cpu to reset, go through the usual reset vector, and get trapped by our code */
/* see platform/zynq/reset.S */
extern volatile int __cpu_trapped;
uint count = 100000;
while (--count) {
arch_clean_invalidate_cache_range((addr_t)&__cpu_trapped, sizeof(__cpu_trapped));
if (__cpu_trapped != 0)
break;
}
if (count == 0) {
panic("ZYNQ: failed to trap 2nd cpu\n");
}
/* bounce the 4th sram region down to lower address */
SLCR_REG(OCM_CFG) &= ~0xf; /* all banks at low address */
/* add the main memory arena */
#if !ZYNQ_CODE_IN_SDRAM && SDRAM_SIZE != 0
/* In the case of running from SRAM, and we are using SDRAM,
* there is a discontinuity between the end of SRAM (256K) and the start of SDRAM (1MB),
* so intentionally bump the boot-time allocator to start in the base of SDRAM.
*/
extern uintptr_t boot_alloc_start;
extern uintptr_t boot_alloc_end;
boot_alloc_start = KERNEL_BASE + MB;
boot_alloc_end = KERNEL_BASE + MB;
#endif
#if SDRAM_SIZE != 0
pmm_add_arena(&sdram_arena);
#endif
pmm_add_arena(&sram_arena);
}
void zynq_ddr_init(void)
{
SLCR_REG(DDRIOB_ADDR0) = zynq_ddriob_cfg.addr0;
SLCR_REG(DDRIOB_ADDR1) = zynq_ddriob_cfg.addr1;
SLCR_REG(DDRIOB_DATA0) = zynq_ddriob_cfg.data0;
SLCR_REG(DDRIOB_DATA1) = zynq_ddriob_cfg.data1;
SLCR_REG(DDRIOB_DIFF0) = zynq_ddriob_cfg.diff0;
SLCR_REG(DDRIOB_DIFF1) = zynq_ddriob_cfg.diff1;
SLCR_REG(DDRIOB_CLOCK) = DDRIOB_OUTPUT_EN(0x3);
/* These register fields are not documented in the TRM. These
* values represent the defaults generated via the Zynq tools
*/
SLCR_REG(DDRIOB_DRIVE_SLEW_ADDR) = 0x0018C61CU;
SLCR_REG(DDRIOB_DRIVE_SLEW_DATA) = 0x00F9861CU;
SLCR_REG(DDRIOB_DRIVE_SLEW_DIFF) = 0x00F9861CU;
SLCR_REG(DDRIOB_DRIVE_SLEW_CLOCK) = 0x00F9861CU;
SLCR_REG(DDRIOB_DDR_CTRL) = 0x00000E60U;
SLCR_REG(DDRIOB_DCI_CTRL) = 0x00000001U;
SLCR_REG(DDRIOB_DCI_CTRL) |= 0x00000020U;
SLCR_REG(DDRIOB_DCI_CTRL) |= 0x00000823U;
/* Write addresss / value pairs from target table */
for (size_t i = 0; i < zynq_ddr_cfg_cnt; i += 2) {
*REG32(zynq_ddr_cfg[i]) = zynq_ddr_cfg[i+1];
}
/* Wait for DCI done */
reg_poll((uintptr_t)&SLCR->DDRIOB_DCI_STATUS, 0x2000);
/* Bring ddr out of reset and wait until self refresh */
*REG32(DDRC_CTRL) |= DDRC_CTRL_OUT_OF_RESET;
reg_poll(DDRC_MODE_STATUS, DDRC_STS_SELF_REFRESH);
/* Switch timer to 64k */
*REG32(0XF8007000) = *REG32(0xF8007000) & ~0x20000000U;
if (zynq_ddriob_cfg.ibuf_disable) {
SLCR_REG(DDRIOB_DATA0) |= DDRIOB_IBUF_DISABLE_MODE;
SLCR_REG(DDRIOB_DATA1) |= DDRIOB_IBUF_DISABLE_MODE;
SLCR_REG(DDRIOB_DIFF0) |= DDRIOB_IBUF_DISABLE_MODE;
SLCR_REG(DDRIOB_DIFF1) |= DDRIOB_IBUF_DISABLE_MODE;
}
if (zynq_ddriob_cfg.term_disable) {
SLCR_REG(DDRIOB_DATA0) |= DDRIOB_TERM_DISABLE_MODE;
SLCR_REG(DDRIOB_DATA1) |= DDRIOB_TERM_DISABLE_MODE;
SLCR_REG(DDRIOB_DIFF0) |= DDRIOB_TERM_DISABLE_MODE;
SLCR_REG(DDRIOB_DIFF1) |= DDRIOB_TERM_DISABLE_MODE;
}
}
void zynq_clk_init(void)
{
SLCR_REG(DCI_CLK_CTRL) = zynq_clk_cfg.dci_clk;
SLCR_REG(GEM0_CLK_CTRL) = zynq_clk_cfg.gem0_clk;
SLCR_REG(GEM0_RCLK_CTRL) = zynq_clk_cfg.gem0_rclk;
SLCR_REG(GEM1_CLK_CTRL) = zynq_clk_cfg.gem1_clk;
SLCR_REG(GEM1_RCLK_CTRL) = zynq_clk_cfg.gem1_rclk;
SLCR_REG(SMC_CLK_CTRL) = zynq_clk_cfg.smc_clk;
SLCR_REG(LQSPI_CLK_CTRL) = zynq_clk_cfg.lqspi_clk;
SLCR_REG(SDIO_CLK_CTRL) = zynq_clk_cfg.sdio_clk;
SLCR_REG(UART_CLK_CTRL) = zynq_clk_cfg.uart_clk;
SLCR_REG(SPI_CLK_CTRL) = zynq_clk_cfg.spi_clk;
SLCR_REG(CAN_CLK_CTRL) = zynq_clk_cfg.can_clk;
SLCR_REG(CAN_MIOCLK_CTRL)= zynq_clk_cfg.can_mioclk;
SLCR_REG(USB0_CLK_CTRL) = zynq_clk_cfg.usb0_clk;
SLCR_REG(USB1_CLK_CTRL) = zynq_clk_cfg.usb1_clk;
SLCR_REG(PCAP_CLK_CTRL) = zynq_clk_cfg.pcap_clk;
SLCR_REG(FPGA0_CLK_CTRL) = zynq_clk_cfg.fpga0_clk;
SLCR_REG(FPGA1_CLK_CTRL) = zynq_clk_cfg.fpga1_clk;
SLCR_REG(FPGA2_CLK_CTRL) = zynq_clk_cfg.fpga2_clk;
SLCR_REG(FPGA3_CLK_CTRL) = zynq_clk_cfg.fpga3_clk;
SLCR_REG(APER_CLK_CTRL) = zynq_clk_cfg.aper_clk;
SLCR_REG(CLK_621_TRUE) = zynq_clk_cfg.clk_621_true;
}
/* For each PLL we need to configure the cp / res / lock_cnt and then place the PLL in bypass
* before doing a reset to switch to the new values. Then bypass is removed to switch back to using
* the PLL once its locked.
*/
int zynq_pll_init(void) {
const zynq_pll_cfg_tree_t *cfg = &zynq_pll_cfg;
zynq_slcr_unlock();
SLCR_REG(ARM_PLL_CFG) = PLL_CFG_LOCK_CNT(cfg->arm.lock_cnt) | PLL_CFG_PLL_CP(cfg->arm.cp) |
PLL_CFG_PLL_RES(cfg->arm.res);
SLCR_REG(ARM_PLL_CTRL) = PLL_FDIV(cfg->arm.fdiv) | PLL_BYPASS_FORCE | PLL_RESET;
SLCR_REG(ARM_PLL_CTRL) &= ~PLL_RESET;
if (reg_poll((uintptr_t)&SLCR->PLL_STATUS, PLL_STATUS_ARM_PLL_LOCK) == -1) {
return -1;
}
SLCR_REG(ARM_PLL_CTRL) &= ~PLL_BYPASS_FORCE;
SLCR_REG(ARM_CLK_CTRL) = zynq_clk_cfg.arm_clk;
#if ZYNQ_SDRAM_INIT
SLCR_REG(DDR_PLL_CFG) = PLL_CFG_LOCK_CNT(cfg->ddr.lock_cnt) | PLL_CFG_PLL_CP(cfg->ddr.cp) |
PLL_CFG_PLL_RES(cfg->ddr.res);
SLCR_REG(DDR_PLL_CTRL) = PLL_FDIV(cfg->ddr.fdiv) | PLL_BYPASS_FORCE | PLL_RESET;
SLCR_REG(DDR_PLL_CTRL) &= ~PLL_RESET;
if (reg_poll((uintptr_t)&SLCR->PLL_STATUS, PLL_STATUS_DDR_PLL_LOCK) == -1) {
return -1;
}
SLCR_REG(DDR_PLL_CTRL) &= ~PLL_BYPASS_FORCE;
SLCR_REG(DDR_CLK_CTRL) = zynq_clk_cfg.ddr_clk;
#endif
SLCR_REG(IO_PLL_CFG) = PLL_CFG_LOCK_CNT(cfg->io.lock_cnt) | PLL_CFG_PLL_CP(cfg->io.cp) |
PLL_CFG_PLL_RES(cfg->io.res);
SLCR_REG(IO_PLL_CTRL) = PLL_FDIV(cfg->io.fdiv) | PLL_BYPASS_FORCE | PLL_RESET;
SLCR_REG(IO_PLL_CTRL) &= ~PLL_RESET;
if (reg_poll((uintptr_t)&SLCR->PLL_STATUS, PLL_STATUS_IO_PLL_LOCK) == -1) {
return -1;
}
SLCR_REG(IO_PLL_CTRL) &= ~PLL_BYPASS_FORCE;
zynq_slcr_lock();
return 0;
}
int zynq_clk_init(void)
{
zynq_slcr_unlock();
SLCR_REG(DCI_CLK_CTRL) = CLK_CTRL_CLKACT1 | CLK_CTRL_DIVISOR1(52) | CLK_CTRL_DIVISOR2(2);
SLCR_REG(GEM0_RCLK_CTRL) = CLK_CTRL_CLKACT1;
SLCR_REG(GEM0_CLK_CTRL) = CLK_CTRL_CLKACT1 | CLK_CTRL_DIVISOR1(8) | CLK_CTRL_DIVISOR2(1);
SLCR_REG(LQSPI_CLK_CTRL) = CLK_CTRL_CLKACT1 | CLK_CTRL_DIVISOR1(5);
SLCR_REG(SDIO_CLK_CTRL) = CLK_CTRL_CLKACT1 | CLK_CTRL_DIVISOR1(20);
SLCR_REG(UART_CLK_CTRL) = CLK_CTRL_CLKACT2 | CLK_CTRL_DIVISOR1(20);
SLCR_REG(PCAP_CLK_CTRL) = CLK_CTRL_CLKACT1 | CLK_CTRL_DIVISOR1(5);
SLCR_REG(FPGA0_CLK_CTRL) = CLK_CTRL_DIVISOR1(10) | CLK_CTRL_DIVISOR2(1);
SLCR_REG(FPGA1_CLK_CTRL) = CLK_CTRL_SRCSEL(3) | CLK_CTRL_DIVISOR1(6) | CLK_CTRL_DIVISOR2(1);
SLCR_REG(FPGA2_CLK_CTRL) = CLK_CTRL_SRCSEL(2) | CLK_CTRL_DIVISOR1(53) | CLK_CTRL_DIVISOR2(2);
SLCR_REG(FPGA3_CLK_CTRL) = CLK_CTRL_DIVISOR2(1);
SLCR_REG(CLK_621_TRUE) = CLK_621_ENABLE;
SLCR_REG(APER_CLK_CTRL) = DMA_CPU_CLK_EN | USB0_CPU_CLK_EN | USB1_CPU_CLK_EN |
GEM0_CPU_CLK_EN | SDI0_CPU_CLK_EN | I2C0_CPU_CLK_EN |
I2C1_CPU_CLK_EN | UART1_CPU_CLK_EN | GPIO_CPU_CLK_EN |
LQSPI_CPU_CLK_EN | SMC_CPU_CLK_EN;
zynq_slcr_lock();
return 0;
}
int zynq_mio_init(void)
{
zynq_slcr_unlock();
SLCR_REG(GPIOB_CTRL) = GPIOB_CTRL_VREF_EN;
SLCR_REG(DDRIOB_ADDR0) = DDRIOB_OUTPUT_EN(0x3);
SLCR_REG(DDRIOB_ADDR1) = DDRIOB_OUTPUT_EN(0x3);
SLCR_REG(DDRIOB_DATA0) = DDRIOB_INP_TYPE(1) | DDRIOB_TERM_EN |
DDRIOB_DCI_TYPE(0x3) | DDRIOB_OUTPUT_EN(0x3);
SLCR_REG(DDRIOB_DATA1) = DDRIOB_INP_TYPE(1) | DDRIOB_TERM_EN |
DDRIOB_DCI_TYPE(0x3) | DDRIOB_OUTPUT_EN(0x3);
SLCR_REG(DDRIOB_DIFF0) = DDRIOB_INP_TYPE(2) | DDRIOB_TERM_EN |
DDRIOB_DCI_TYPE(0x3) | DDRIOB_OUTPUT_EN(0x3);
SLCR_REG(DDRIOB_DIFF1) = DDRIOB_INP_TYPE(2) | DDRIOB_TERM_EN |
DDRIOB_DCI_TYPE(0x3) | DDRIOB_OUTPUT_EN(0x3);
SLCR_REG(DDRIOB_CLOCK) = DDRIOB_OUTPUT_EN(0x3);
/* These register fields are not documented in the TRM. These
* values represent the defaults generated via the Zynq tools
*/
SLCR_REG(DDRIOB_DRIVE_SLEW_ADDR) = 0x0018C61CU;
SLCR_REG(DDRIOB_DRIVE_SLEW_DATA) = 0x00F9861CU;
SLCR_REG(DDRIOB_DRIVE_SLEW_DIFF) = 0x00F9861CU;
SLCR_REG(DDRIOB_DRIVE_SLEW_CLOCK) = 0x00F9861CU;
SLCR_REG(DDRIOB_DDR_CTRL) = 0x00000E60U;
SLCR_REG(DDRIOB_DCI_CTRL) = 0x00000001U;
SLCR_REG(DDRIOB_DCI_CTRL) |= 0x00000020U;
SLCR_REG(DDRIOB_DCI_CTRL) |= 0x00000823U;
/* mio pin config */
SLCR_REG(MIO_PIN_01) = MIO_L0_SEL | MIO_SPEED_FAST | MIO_IO_TYPE_LVCMOS33;
SLCR_REG(MIO_PIN_02) = MIO_L0_SEL | MIO_SPEED_FAST | MIO_IO_TYPE_LVCMOS33;
SLCR_REG(MIO_PIN_03) = MIO_L0_SEL | MIO_SPEED_FAST | MIO_IO_TYPE_LVCMOS33;
SLCR_REG(MIO_PIN_04) = MIO_L0_SEL | MIO_SPEED_FAST | MIO_IO_TYPE_LVCMOS33;
SLCR_REG(MIO_PIN_05) = MIO_L0_SEL | MIO_SPEED_FAST | MIO_IO_TYPE_LVCMOS33;
SLCR_REG(MIO_PIN_06) = MIO_L0_SEL | MIO_SPEED_FAST | MIO_IO_TYPE_LVCMOS33;
SLCR_REG(MIO_PIN_08) = MIO_L0_SEL | MIO_SPEED_FAST | MIO_IO_TYPE_LVCMOS33;
SLCR_REG(MIO_PIN_16) = MIO_L0_SEL | MIO_SPEED_FAST | MIO_IO_TYPE_HSTL | MIO_DISABLE_RCVR;
SLCR_REG(MIO_PIN_17) = MIO_L0_SEL | MIO_SPEED_FAST | MIO_IO_TYPE_HSTL | MIO_DISABLE_RCVR;
SLCR_REG(MIO_PIN_18) = MIO_L0_SEL | MIO_SPEED_FAST | MIO_IO_TYPE_HSTL | MIO_DISABLE_RCVR;
SLCR_REG(MIO_PIN_19) = MIO_L0_SEL | MIO_SPEED_FAST | MIO_IO_TYPE_HSTL | MIO_DISABLE_RCVR;
SLCR_REG(MIO_PIN_20) = MIO_L0_SEL | MIO_SPEED_FAST | MIO_IO_TYPE_HSTL | MIO_DISABLE_RCVR;
SLCR_REG(MIO_PIN_21) = MIO_L0_SEL | MIO_SPEED_FAST | MIO_IO_TYPE_HSTL | MIO_DISABLE_RCVR;
SLCR_REG(MIO_PIN_22) = MIO_TRI_ENABLE | MIO_L0_SEL | MIO_SPEED_FAST | MIO_IO_TYPE_HSTL;
SLCR_REG(MIO_PIN_23) = MIO_TRI_ENABLE | MIO_L0_SEL | MIO_SPEED_FAST | MIO_IO_TYPE_HSTL;
SLCR_REG(MIO_PIN_24) = MIO_TRI_ENABLE | MIO_L0_SEL | MIO_SPEED_FAST | MIO_IO_TYPE_HSTL;
SLCR_REG(MIO_PIN_25) = MIO_TRI_ENABLE | MIO_L0_SEL | MIO_SPEED_FAST | MIO_IO_TYPE_HSTL;
SLCR_REG(MIO_PIN_26) = MIO_TRI_ENABLE | MIO_L0_SEL | MIO_SPEED_FAST | MIO_IO_TYPE_HSTL;
SLCR_REG(MIO_PIN_27) = MIO_TRI_ENABLE | MIO_L0_SEL | MIO_SPEED_FAST | MIO_IO_TYPE_HSTL;
SLCR_REG(MIO_PIN_28) = MIO_L1_SEL | MIO_SPEED_FAST | MIO_IO_TYPE_LVCMOS18;
SLCR_REG(MIO_PIN_29) = MIO_L1_SEL | MIO_SPEED_FAST | MIO_IO_TYPE_LVCMOS18 | MIO_TRI_ENABLE;
SLCR_REG(MIO_PIN_30) = MIO_L1_SEL | MIO_SPEED_FAST | MIO_IO_TYPE_LVCMOS18;
SLCR_REG(MIO_PIN_31) = MIO_L1_SEL | MIO_SPEED_FAST | MIO_IO_TYPE_LVCMOS18 | MIO_TRI_ENABLE;
SLCR_REG(MIO_PIN_32) = MIO_L1_SEL | MIO_SPEED_FAST | MIO_IO_TYPE_LVCMOS18;
SLCR_REG(MIO_PIN_33) = MIO_L1_SEL | MIO_SPEED_FAST | MIO_IO_TYPE_LVCMOS18;
SLCR_REG(MIO_PIN_34) = MIO_L1_SEL | MIO_SPEED_FAST | MIO_IO_TYPE_LVCMOS18;
SLCR_REG(MIO_PIN_35) = MIO_L1_SEL | MIO_SPEED_FAST | MIO_IO_TYPE_LVCMOS18;
SLCR_REG(MIO_PIN_36) = MIO_L1_SEL | MIO_SPEED_FAST | MIO_IO_TYPE_LVCMOS18 | MIO_TRI_ENABLE;
SLCR_REG(MIO_PIN_37) = MIO_L1_SEL | MIO_SPEED_FAST | MIO_IO_TYPE_LVCMOS18;
SLCR_REG(MIO_PIN_38) = MIO_L1_SEL | MIO_SPEED_FAST | MIO_IO_TYPE_LVCMOS18;
SLCR_REG(MIO_PIN_39) = MIO_L1_SEL | MIO_SPEED_FAST | MIO_IO_TYPE_LVCMOS18;
SLCR_REG(MIO_PIN_40) = MIO_L3_SEL(0x4) | MIO_SPEED_FAST | MIO_IO_TYPE_LVCMOS18;
SLCR_REG(MIO_PIN_41) = MIO_L3_SEL(0x4) | MIO_SPEED_FAST | MIO_IO_TYPE_LVCMOS18;
SLCR_REG(MIO_PIN_42) = MIO_L3_SEL(0x4) | MIO_SPEED_FAST | MIO_IO_TYPE_LVCMOS18;
SLCR_REG(MIO_PIN_43) = MIO_L3_SEL(0x4) | MIO_SPEED_FAST | MIO_IO_TYPE_LVCMOS18;
SLCR_REG(MIO_PIN_44) = MIO_L3_SEL(0x4) | MIO_SPEED_FAST | MIO_IO_TYPE_LVCMOS18;
SLCR_REG(MIO_PIN_45) = MIO_L3_SEL(0x4) | MIO_SPEED_FAST | MIO_IO_TYPE_LVCMOS18;
SLCR_REG(MIO_PIN_47) = MIO_TRI_ENABLE | MIO_IO_TYPE_LVCMOS18;
SLCR_REG(MIO_PIN_48) = MIO_L3_SEL(0x7) | MIO_IO_TYPE_LVCMOS18;
SLCR_REG(MIO_PIN_49) = MIO_TRI_ENABLE | MIO_L3_SEL(0x7) | MIO_IO_TYPE_LVCMOS18;
SLCR_REG(MIO_PIN_52) = MIO_L3_SEL(0x4) | MIO_IO_TYPE_LVCMOS18;
SLCR_REG(MIO_PIN_53) = MIO_L3_SEL(0x4) | MIO_IO_TYPE_LVCMOS18;
SLCR_REG(SD0_WP_CD_SEL) = SDIO0_WP_SEL(0x37) | SDIO0_CD_SEL(0x2F);
zynq_slcr_lock();
return 0;
}
/* For each PLL we need to configure the cp / res / lock_cnt and then place the PLL in bypass
* before doing a reset to switch to the new values. Then bypass is removed to switch back to using
* the PLL once its locked.
*/
int zynq_pll_init(void) {
const zynq_pll_cfg_tree_t *cfg = &zynq_pll_cfg;
SLCR_REG(ARM_PLL_CFG) = PLL_CFG_LOCK_CNT(cfg->arm.lock_cnt) | PLL_CFG_PLL_CP(cfg->arm.cp) |
PLL_CFG_PLL_RES(cfg->arm.res);
SLCR_REG(ARM_PLL_CTRL) = PLL_FDIV(cfg->arm.fdiv) | PLL_BYPASS_FORCE | PLL_RESET;
SLCR_REG(ARM_PLL_CTRL) &= ~PLL_RESET;
if (reg_poll((uintptr_t)&SLCR->PLL_STATUS, PLL_STATUS_ARM_PLL_LOCK) == -1) {
return -1;
}
SLCR_REG(ARM_PLL_CTRL) &= ~PLL_BYPASS_FORCE;
SLCR_REG(ARM_CLK_CTRL) = zynq_clk_cfg.arm_clk;
#if ZYNQ_SDRAM_INIT
SLCR_REG(DDR_PLL_CFG) = PLL_CFG_LOCK_CNT(cfg->ddr.lock_cnt) | PLL_CFG_PLL_CP(cfg->ddr.cp) |
PLL_CFG_PLL_RES(cfg->ddr.res);
SLCR_REG(DDR_PLL_CTRL) = PLL_FDIV(cfg->ddr.fdiv) | PLL_BYPASS_FORCE | PLL_RESET;
SLCR_REG(DDR_PLL_CTRL) &= ~PLL_RESET;
if (reg_poll((uintptr_t)&SLCR->PLL_STATUS, PLL_STATUS_DDR_PLL_LOCK) == -1) {
return -1;
}
SLCR_REG(DDR_PLL_CTRL) &= ~PLL_BYPASS_FORCE;
SLCR_REG(DDR_CLK_CTRL) = zynq_clk_cfg.ddr_clk;
#elif SDRAM_SIZE == 0
/* if we're not using sdram and haven't been told to initialize sdram, stop the DDR pll */
SLCR_REG(DDR_CLK_CTRL) = 0;
SLCR_REG(DDR_PLL_CTRL) |= PLL_PWRDOWN;
#endif
SLCR_REG(IO_PLL_CFG) = PLL_CFG_LOCK_CNT(cfg->io.lock_cnt) | PLL_CFG_PLL_CP(cfg->io.cp) |
PLL_CFG_PLL_RES(cfg->io.res);
SLCR_REG(IO_PLL_CTRL) = PLL_FDIV(cfg->io.fdiv) | PLL_BYPASS_FORCE | PLL_RESET;
SLCR_REG(IO_PLL_CTRL) &= ~PLL_RESET;
if (reg_poll((uintptr_t)&SLCR->PLL_STATUS, PLL_STATUS_IO_PLL_LOCK) == -1) {
return -1;
}
SLCR_REG(IO_PLL_CTRL) &= ~PLL_BYPASS_FORCE;
return 0;
}
int zynq_pll_init(void) {
zynq_slcr_unlock();
/* ARM PLL & Clock config
* 375 cycles needed for pll
* 26 divisor on pll
* enable all ARM clocks
* 2 divisor on ARM clocks
* ARM clock source is ARM PLL
*/
SLCR_REG(ARM_PLL_CFG) = PLL_CFG_LOCK_CNT(375) | PLL_CFG_PLL_CP(2) | PLL_CFG_PLL_RES(12);
SLCR_REG(ARM_PLL_CTRL) = PLL_FDIV(26) | PLL_BYPASS_FORCE | PLL_RESET;
SLCR_REG(ARM_PLL_CTRL) &= ~PLL_RESET;
if (pll_poll(PLL_STATUS_ARM_PLL_LOCK) == -1) {
return -1;
}
SLCR_REG(ARM_PLL_CTRL) &= ~PLL_BYPASS_FORCE;
SLCR_REG(ARM_CLK_CTRL) = ARM_CLK_CTRL_DIVISOR(2) | ARM_CLK_CTRL_CPU_6OR4XCLKACT |
ARM_CLK_CTRL_CPU_3OR2XCLKACT | ARM_CLK_CTRL_CPU_2XCLKACT |
ARM_CLK_CTRL_CPU_1XCLKACT |ARM_CLK_CTRL_PERI_CLKACT;
/* DDR PLL & Clock config
* 475 cycles needed
* 21 divisor on PLL
* enable all DDR clocks
* 2 divisor for 3XCLK, 3 divisor for 2XCLK
*/
SLCR_REG(DDR_PLL_CFG) = PLL_CFG_LOCK_CNT(475) | PLL_CFG_PLL_CP(2) | PLL_CFG_PLL_RES(12);
SLCR_REG(DDR_PLL_CTRL) = PLL_FDIV(26) | PLL_BYPASS_FORCE | PLL_RESET;
SLCR_REG(DDR_PLL_CTRL) &= ~PLL_RESET;
if (pll_poll(PLL_STATUS_DDR_PLL_LOCK) == -1) {
return -1;
}
SLCR_REG(DDR_PLL_CTRL) &= ~PLL_BYPASS_FORCE;
SLCR_REG(DDR_CLK_CTRL) = DDR_CLK_CTRL_DDR_3XCLKACT | DDR_CLK_CTRL_DDR_2XCLKACT |
DDR_CLK_CTRL_DDR_3XCLK_DIV(2) | DDR_CLK_CTRL_DDR_2XCLK_DIV(3);
/* IO PLL config
* 500 cycles needed for pll
* 20 divisor
*/
SLCR_REG(IO_PLL_CFG) = PLL_CFG_LOCK_CNT(500) | PLL_CFG_PLL_CP(2) | PLL_CFG_PLL_RES(12);
SLCR_REG(IO_PLL_CTRL) = PLL_FDIV(20) | PLL_BYPASS_FORCE | PLL_RESET;
SLCR_REG(IO_PLL_CTRL) &= ~PLL_RESET;
if (pll_poll(PLL_STATUS_IO_PLL_LOCK) == -1) {
return -1;
}
SLCR_REG(IO_PLL_CTRL) &= ~PLL_BYPASS_FORCE;
zynq_slcr_lock();
return 0;
}
int zynq_mio_init(void)
{
zynq_slcr_unlock();
/* This DDRIOB configuration applies to both zybo and uzed, but it's possible
* it may not work for all boards in the future. Just something to keep in mind
* with different memory configurations.
*/
#if ZYNQ_SDRAM_INIT
SLCR_REG(GPIOB_CTRL) = GPIOB_CTRL_VREF_EN;
SLCR_REG(DDRIOB_ADDR0) = DDRIOB_OUTPUT_EN(0x3);
SLCR_REG(DDRIOB_ADDR1) = DDRIOB_OUTPUT_EN(0x3);
SLCR_REG(DDRIOB_DATA0) = DDRIOB_INP_TYPE(1) | DDRIOB_TERM_EN |
DDRIOB_DCI_TYPE(0x3) | DDRIOB_OUTPUT_EN(0x3);
SLCR_REG(DDRIOB_DATA1) = DDRIOB_INP_TYPE(1) | DDRIOB_TERM_EN |
DDRIOB_DCI_TYPE(0x3) | DDRIOB_OUTPUT_EN(0x3);
SLCR_REG(DDRIOB_DIFF0) = DDRIOB_INP_TYPE(2) | DDRIOB_TERM_EN |
DDRIOB_DCI_TYPE(0x3) | DDRIOB_OUTPUT_EN(0x3);
SLCR_REG(DDRIOB_DIFF1) = DDRIOB_INP_TYPE(2) | DDRIOB_TERM_EN |
DDRIOB_DCI_TYPE(0x3) | DDRIOB_OUTPUT_EN(0x3);
SLCR_REG(DDRIOB_CLOCK) = DDRIOB_OUTPUT_EN(0x3);
/* These register fields are not documented in the TRM. These
* values represent the defaults generated via the Zynq tools
*/
SLCR_REG(DDRIOB_DRIVE_SLEW_ADDR) = 0x0018C61CU;
SLCR_REG(DDRIOB_DRIVE_SLEW_DATA) = 0x00F9861CU;
SLCR_REG(DDRIOB_DRIVE_SLEW_DIFF) = 0x00F9861CU;
SLCR_REG(DDRIOB_DRIVE_SLEW_CLOCK) = 0x00F9861CU;
SLCR_REG(DDRIOB_DDR_CTRL) = 0x00000E60U;
SLCR_REG(DDRIOB_DCI_CTRL) = 0x00000001U;
SLCR_REG(DDRIOB_DCI_CTRL) |= 0x00000020U;
SLCR_REG(DDRIOB_DCI_CTRL) |= 0x00000823U;
#endif
for (size_t pin = 0; pin < countof(zynq_mio_cfg); pin++) {
if (zynq_mio_cfg[pin] != 0) {
SLCR_REG(MIO_PIN_00 + (pin * sizeof(uint32_t))) = zynq_mio_cfg[pin];
}
}
SLCR_REG(SD0_WP_CD_SEL) = SDIO0_WP_SEL(0x37) | SDIO0_CD_SEL(0x2F);
zynq_slcr_lock();
return 0;
}
