diff options
Diffstat (limited to 'drivers/marvell/ccu.c')
| -rw-r--r-- | drivers/marvell/ccu.c | 417 |
1 files changed, 417 insertions, 0 deletions
diff --git a/drivers/marvell/ccu.c b/drivers/marvell/ccu.c new file mode 100644 index 0000000..c206f11 --- /dev/null +++ b/drivers/marvell/ccu.c @@ -0,0 +1,417 @@ +/* + * Copyright (C) 2018 Marvell International Ltd. + * + * SPDX-License-Identifier: BSD-3-Clause + * https://spdx.org/licenses + */ + +/* CCU unit device driver for Marvell AP807, AP807 and AP810 SoCs */ + +#include <inttypes.h> +#include <stdint.h> + +#include <common/debug.h> +#include <drivers/marvell/ccu.h> +#include <lib/mmio.h> + +#include <armada_common.h> +#include <mvebu.h> +#include <mvebu_def.h> + +#if LOG_LEVEL >= LOG_LEVEL_INFO +#define DEBUG_ADDR_MAP +#endif + +/* common defines */ +#define WIN_ENABLE_BIT (0x1) +/* Physical address of the base of the window = {AddrLow[19:0],20'h0} */ +#define ADDRESS_SHIFT (20 - 4) +#define ADDRESS_MASK (0xFFFFFFF0) +#define CCU_WIN_ALIGNMENT (0x100000) + +/* + * Physical address of the highest address of window bits[31:19] = 0x6FF + * Physical address of the lowest address of window bits[18:6] = 0x6E0 + * Unit Id bits [5:2] = 2 + * RGF Window Enable bit[0] = 1 + * 0x37f9b809 - 11011111111 0011011100000 0010 0 1 + */ +#define ERRATA_WA_CCU_WIN4 0x37f9b809U + +/* + * Physical address of the highest address of window bits[31:19] = 0xFFF + * Physical address of the lowest address of window bits[18:6] = 0x800 + * Unit Id bits [5:2] = 2 + * RGF Window Enable bit[0] = 1 + * 0x7ffa0009 - 111111111111 0100000000000 0010 0 1 + */ +#define ERRATA_WA_CCU_WIN5 0x7ffa0009U + +/* + * Physical address of the highest address of window bits[31:19] = 0x1FFF + * Physical address of the lowest address of window bits[18:6] = 0x1000 + * Unit Id bits [5:2] = 2 + * RGF Window Enable bit[0] = 1 + * 0xfffc000d - 1111111111111 1000000000000 0011 0 1 + */ +#define ERRATA_WA_CCU_WIN6 0xfffc000dU + +#define IS_DRAM_TARGET(tgt) ((((tgt) == DRAM_0_TID) || \ + ((tgt) == DRAM_1_TID) || \ + ((tgt) == RAR_TID)) ? 1 : 0) + +#define CCU_RGF(win) (MVEBU_CCU_BASE(MVEBU_AP0) + \ + 0x90 + 4 * (win)) + +/* For storage of CR, SCR, ALR, AHR abd GCR */ +static uint32_t ccu_regs_save[MVEBU_CCU_MAX_WINS * 4 + 1]; + +#ifdef DEBUG_ADDR_MAP +static void dump_ccu(int ap_index) +{ + uint32_t win_id, win_cr, alr, ahr; + uint8_t target_id; + uint64_t start, end; + + /* Dump all AP windows */ + printf("\tbank target start end\n"); + printf("\t----------------------------------------------------\n"); + for (win_id = 0; win_id < MVEBU_CCU_MAX_WINS; win_id++) { + win_cr = mmio_read_32(CCU_WIN_CR_OFFSET(ap_index, win_id)); + if (win_cr & WIN_ENABLE_BIT) { + target_id = (win_cr >> CCU_TARGET_ID_OFFSET) & + CCU_TARGET_ID_MASK; + alr = mmio_read_32(CCU_WIN_ALR_OFFSET(ap_index, + win_id)); + ahr = mmio_read_32(CCU_WIN_AHR_OFFSET(ap_index, + win_id)); + start = ((uint64_t)alr << ADDRESS_SHIFT); + end = (((uint64_t)ahr + 0x10) << ADDRESS_SHIFT); + printf("\tccu%d %02x 0x%016" PRIx64 " 0x%016" PRIx64 "\n", + win_id, target_id, start, end); + } + } + win_cr = mmio_read_32(CCU_WIN_GCR_OFFSET(ap_index)); + target_id = (win_cr >> CCU_GCR_TARGET_OFFSET) & CCU_GCR_TARGET_MASK; + printf("\tccu GCR %d - all other transactions\n", target_id); +} +#endif + +void ccu_win_check(struct addr_map_win *win) +{ + /* check if address is aligned to 1M */ + if (IS_NOT_ALIGN(win->base_addr, CCU_WIN_ALIGNMENT)) { + win->base_addr = ALIGN_UP(win->base_addr, CCU_WIN_ALIGNMENT); + NOTICE("%s: Align up the base address to 0x%" PRIx64 "\n", + __func__, win->base_addr); + } + + /* size parameter validity check */ + if (IS_NOT_ALIGN(win->win_size, CCU_WIN_ALIGNMENT)) { + win->win_size = ALIGN_UP(win->win_size, CCU_WIN_ALIGNMENT); + NOTICE("%s: Aligning size to 0x%" PRIx64 "\n", + __func__, win->win_size); + } +} + +int ccu_is_win_enabled(int ap_index, uint32_t win_id) +{ + return mmio_read_32(CCU_WIN_CR_OFFSET(ap_index, win_id)) & + WIN_ENABLE_BIT; +} + +void ccu_enable_win(int ap_index, struct addr_map_win *win, uint32_t win_id) +{ + uint32_t ccu_win_reg; + uint32_t alr, ahr; + uint64_t end_addr; + + if ((win_id == 0) || (win_id > MVEBU_CCU_MAX_WINS)) { + ERROR("Enabling wrong CCU window %d!\n", win_id); + return; + } + + end_addr = (win->base_addr + win->win_size - 1); + alr = (uint32_t)((win->base_addr >> ADDRESS_SHIFT) & ADDRESS_MASK); + ahr = (uint32_t)((end_addr >> ADDRESS_SHIFT) & ADDRESS_MASK); + + mmio_write_32(CCU_WIN_ALR_OFFSET(ap_index, win_id), alr); + mmio_write_32(CCU_WIN_AHR_OFFSET(ap_index, win_id), ahr); + + ccu_win_reg = WIN_ENABLE_BIT; + ccu_win_reg |= (win->target_id & CCU_TARGET_ID_MASK) + << CCU_TARGET_ID_OFFSET; + mmio_write_32(CCU_WIN_CR_OFFSET(ap_index, win_id), ccu_win_reg); +} + +static void ccu_disable_win(int ap_index, uint32_t win_id) +{ + uint32_t win_reg; + + if ((win_id == 0) || (win_id > MVEBU_CCU_MAX_WINS)) { + ERROR("Disabling wrong CCU window %d!\n", win_id); + return; + } + + win_reg = mmio_read_32(CCU_WIN_CR_OFFSET(ap_index, win_id)); + win_reg &= ~WIN_ENABLE_BIT; + mmio_write_32(CCU_WIN_CR_OFFSET(ap_index, win_id), win_reg); +} + +/* Insert/Remove temporary window for using the out-of reset default + * CPx base address to access the CP configuration space prior to + * the further base address update in accordance with address mapping + * design. + * + * NOTE: Use the same window array for insertion and removal of + * temporary windows. + */ +void ccu_temp_win_insert(int ap_index, struct addr_map_win *win, int size) +{ + uint32_t win_id; + + for (int i = 0; i < size; i++) { + win_id = MVEBU_CCU_MAX_WINS - 1 - i; + ccu_win_check(win); + ccu_enable_win(ap_index, win, win_id); + win++; + } +} + +/* + * NOTE: Use the same window array for insertion and removal of + * temporary windows. + */ +void ccu_temp_win_remove(int ap_index, struct addr_map_win *win, int size) +{ + uint32_t win_id; + + for (int i = 0; i < size; i++) { + uint64_t base; + uint32_t target; + + win_id = MVEBU_CCU_MAX_WINS - 1 - i; + + target = mmio_read_32(CCU_WIN_CR_OFFSET(ap_index, win_id)); + target >>= CCU_TARGET_ID_OFFSET; + target &= CCU_TARGET_ID_MASK; + + base = mmio_read_32(CCU_WIN_ALR_OFFSET(ap_index, win_id)); + base <<= ADDRESS_SHIFT; + + if ((win->target_id != target) || (win->base_addr != base)) { + ERROR("%s: Trying to remove bad window-%d!\n", + __func__, win_id); + continue; + } + ccu_disable_win(ap_index, win_id); + win++; + } +} + +/* Returns current DRAM window target (DRAM_0_TID, DRAM_1_TID, RAR_TID) + * NOTE: Call only once for each AP. + * The AP0 DRAM window is located at index 2 only at the BL31 execution start. + * Then it relocated to index 1 for matching the rest of APs DRAM settings. + * Calling this function after relocation will produce wrong results on AP0 + */ +static uint32_t ccu_dram_target_get(int ap_index) +{ + /* On BLE stage the AP0 DRAM window is opened by the BootROM at index 2. + * All the rest of detected APs will use window at index 1. + * The AP0 DRAM window is moved from index 2 to 1 during + * init_ccu() execution. + */ + const uint32_t win_id = (ap_index == 0) ? 2 : 1; + uint32_t target; + + target = mmio_read_32(CCU_WIN_CR_OFFSET(ap_index, win_id)); + target >>= CCU_TARGET_ID_OFFSET; + target &= CCU_TARGET_ID_MASK; + + return target; +} + +void ccu_dram_target_set(int ap_index, uint32_t target) +{ + /* On BLE stage the AP0 DRAM window is opened by the BootROM at index 2. + * All the rest of detected APs will use window at index 1. + * The AP0 DRAM window is moved from index 2 to 1 + * during init_ccu() execution. + */ + const uint32_t win_id = (ap_index == 0) ? 2 : 1; + uint32_t dram_cr; + + dram_cr = mmio_read_32(CCU_WIN_CR_OFFSET(ap_index, win_id)); + dram_cr &= ~(CCU_TARGET_ID_MASK << CCU_TARGET_ID_OFFSET); + dram_cr |= (target & CCU_TARGET_ID_MASK) << CCU_TARGET_ID_OFFSET; + mmio_write_32(CCU_WIN_CR_OFFSET(ap_index, win_id), dram_cr); +} + +/* Setup CCU DRAM window and enable it */ +void ccu_dram_win_config(int ap_index, struct addr_map_win *win) +{ +#if IMAGE_BLE /* BLE */ + /* On BLE stage the AP0 DRAM window is opened by the BootROM at index 2. + * Since the BootROM is not accessing DRAM at BLE stage, + * the DRAM window can be temporarely disabled. + */ + const uint32_t win_id = (ap_index == 0) ? 2 : 1; +#else /* end of BLE */ + /* At the ccu_init() execution stage, DRAM windows of all APs + * are arranged at index 1. + * The AP0 still has the old window BootROM DRAM at index 2, so + * the window-1 can be safely disabled without breaking the DRAM access. + */ + const uint32_t win_id = 1; +#endif + + ccu_disable_win(ap_index, win_id); + /* enable write secure (and clear read secure) */ + mmio_write_32(CCU_WIN_SCR_OFFSET(ap_index, win_id), + CCU_WIN_ENA_WRITE_SECURE); + ccu_win_check(win); + ccu_enable_win(ap_index, win, win_id); +} + +/* Save content of CCU window + GCR */ +static void ccu_save_win_range(int ap_id, int win_first, + int win_last, uint32_t *buffer) +{ + int win_id, idx; + /* Save CCU */ + for (idx = 0, win_id = win_first; win_id <= win_last; win_id++) { + buffer[idx++] = mmio_read_32(CCU_WIN_CR_OFFSET(ap_id, win_id)); + buffer[idx++] = mmio_read_32(CCU_WIN_SCR_OFFSET(ap_id, win_id)); + buffer[idx++] = mmio_read_32(CCU_WIN_ALR_OFFSET(ap_id, win_id)); + buffer[idx++] = mmio_read_32(CCU_WIN_AHR_OFFSET(ap_id, win_id)); + } + buffer[idx] = mmio_read_32(CCU_WIN_GCR_OFFSET(ap_id)); +} + +/* Restore content of CCU window + GCR */ +static void ccu_restore_win_range(int ap_id, int win_first, + int win_last, uint32_t *buffer) +{ + int win_id, idx; + /* Restore CCU */ + for (idx = 0, win_id = win_first; win_id <= win_last; win_id++) { + mmio_write_32(CCU_WIN_CR_OFFSET(ap_id, win_id), buffer[idx++]); + mmio_write_32(CCU_WIN_SCR_OFFSET(ap_id, win_id), buffer[idx++]); + mmio_write_32(CCU_WIN_ALR_OFFSET(ap_id, win_id), buffer[idx++]); + mmio_write_32(CCU_WIN_AHR_OFFSET(ap_id, win_id), buffer[idx++]); + } + mmio_write_32(CCU_WIN_GCR_OFFSET(ap_id), buffer[idx]); +} + +void ccu_save_win_all(int ap_id) +{ + ccu_save_win_range(ap_id, 0, MVEBU_CCU_MAX_WINS - 1, ccu_regs_save); +} + +void ccu_restore_win_all(int ap_id) +{ + ccu_restore_win_range(ap_id, 0, MVEBU_CCU_MAX_WINS - 1, ccu_regs_save); +} + +int init_ccu(int ap_index) +{ + struct addr_map_win *win, *dram_win; + uint32_t win_id, win_reg; + uint32_t win_count, array_id; + uint32_t dram_target; +#if IMAGE_BLE + /* In BootROM context CCU Window-1 + * has SRAM_TID target and should not be disabled + */ + const uint32_t win_start = 2; +#else + const uint32_t win_start = 1; +#endif + + INFO("Initializing CCU Address decoding\n"); + + /* Get the array of the windows and fill the map data */ + marvell_get_ccu_memory_map(ap_index, &win, &win_count); + if (win_count <= 0) { + INFO("No windows configurations found\n"); + } else if (win_count > (MVEBU_CCU_MAX_WINS - 1)) { + ERROR("CCU mem map array > than max available windows (%d)\n", + MVEBU_CCU_MAX_WINS); + win_count = MVEBU_CCU_MAX_WINS; + } + + /* Need to set GCR to DRAM before all CCU windows are disabled for + * securing the normal access to DRAM location, which the ATF is running + * from. Once all CCU windows are set, which have to include the + * dedicated DRAM window as well, the GCR can be switched to the target + * defined by the platform configuration. + */ + dram_target = ccu_dram_target_get(ap_index); + win_reg = (dram_target & CCU_GCR_TARGET_MASK) << CCU_GCR_TARGET_OFFSET; + mmio_write_32(CCU_WIN_GCR_OFFSET(ap_index), win_reg); + + /* If the DRAM window was already configured at the BLE stage, + * only the window target considered valid, the address range should be + * updated according to the platform configuration. + */ + for (dram_win = win, array_id = 0; array_id < win_count; + array_id++, dram_win++) { + if (IS_DRAM_TARGET(dram_win->target_id)) { + dram_win->target_id = dram_target; + break; + } + } + + /* Disable all AP CCU windows + * Window-0 is always bypassed since it already contains + * data allowing the internal configuration space access + */ + for (win_id = win_start; win_id < MVEBU_CCU_MAX_WINS; win_id++) { + ccu_disable_win(ap_index, win_id); + /* enable write secure (and clear read secure) */ + mmio_write_32(CCU_WIN_SCR_OFFSET(ap_index, win_id), + CCU_WIN_ENA_WRITE_SECURE); + } + + /* win_id is the index of the current ccu window + * array_id is the index of the current memory map window entry + */ + for (win_id = win_start, array_id = 0; + ((win_id < MVEBU_CCU_MAX_WINS) && (array_id < win_count)); + win_id++) { + ccu_win_check(win); + ccu_enable_win(ap_index, win, win_id); + win++; + array_id++; + } + + /* Get & set the default target according to board topology */ + win_reg = (marvell_get_ccu_gcr_target(ap_index) & CCU_GCR_TARGET_MASK) + << CCU_GCR_TARGET_OFFSET; + mmio_write_32(CCU_WIN_GCR_OFFSET(ap_index), win_reg); + +#ifdef DEBUG_ADDR_MAP + dump_ccu(ap_index); +#endif + + INFO("Done CCU Address decoding Initializing\n"); + + return 0; +} + +void errata_wa_init(void) +{ + /* + * EERATA ID: RES-3033912 - Internal Address Space Init state causes + * a hang upon accesses to [0xf070_0000, 0xf07f_ffff] + * Workaround: Boot Firmware (ATF) should configure CCU_RGF_WIN(4) to + * split [0x6e_0000, 0x1ff_ffff] to values [0x6e_0000, 0x6f_ffff] and + * [0x80_0000, 0xff_ffff] and [0x100_0000, 0x1ff_ffff],that cause + * accesses to the segment of [0xf070_0000, 0xf1ff_ffff] + * to act as RAZWI. + */ + mmio_write_32(CCU_RGF(4), ERRATA_WA_CCU_WIN4); + mmio_write_32(CCU_RGF(5), ERRATA_WA_CCU_WIN5); + mmio_write_32(CCU_RGF(6), ERRATA_WA_CCU_WIN6); +} |