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Diffstat (limited to 'include/renesas/ddr_ctrl.h')
| -rw-r--r-- | include/renesas/ddr_ctrl.h | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/include/renesas/ddr_ctrl.h b/include/renesas/ddr_ctrl.h new file mode 100644 index 0000000000..77d7915b2b --- /dev/null +++ b/include/renesas/ddr_ctrl.h @@ -0,0 +1,175 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Cadence DDR Controller + * + * Copyright (C) 2015 Renesas Electronics Europe Ltd + */ + +#ifndef CADENCE_DDR_CTRL_H +#define CADENCE_DDR_CTRL_H + +enum cdns_ddr_range_prot { + CDNS_DDR_RANGE_PROT_BITS_PRIV_SECURE = 0, + CDNS_DDR_RANGE_PROT_BITS_SECURE = 1, + CDNS_DDR_RANGE_PROT_BITS_PRIV = 2, + CDNS_DDR_RANGE_PROT_BITS_FULL = 3, +}; + +/** + * Initialise the Cadence DDR Controller, but doesn't start it. + * + * It sets up the controller so that all 4 AXI slave ports allow access to all + * of the DDR with the same settings. This means that: + * - Full access permisions. + * - All read/write priorities are set to 2. + * - Bandwidth is set to 50%, overflow is allowed, i.e. it's a soft limit. + * If you want different properties for different ports and/or addr ranges, call + * the other functions before calling cdns_ddr_ctrl_start(). + * + * @ddr_ctrl_base Physical address of the DDR Controller. + * @async 0 if DDR clock is synchronous with the controller clock + * otherwise 1. + * @reg0 Pointer to array of 32-bit values to be written to registers + * 0 to 87. The values are generated by Cadence TCL scripts. + * @reg350 Pointer to array of 32-bit values to be written to registers + * 350 to 374. The values are generated by Cadence TCL scripts. + * @ddr_start_addr Physical address of the start of DDR. + * @ddr_size Size of the DDR in bytes. The controller will set the port + * protection range to match this size. + * @enable_ecc 0 to disable ECC, 1 to enable it. + * @enable_8bit 0 to use 16-bit bus width, 1 to use 8-bit bus width. + */ +void cdns_ddr_ctrl_init(void *ddr_ctrl_base, int async, + const u32 *reg0, const u32 *reg350, + u32 ddr_start_addr, u32 ddr_size, + int enable_ecc, int enable_8bit); + +/** + * Start the Cadence DDR Controller. + * + * @ddr_ctrl_base Physical address of the DDR Controller. + */ +void cdns_ddr_ctrl_start(void *ddr_ctrl_base); + +/** + * Set the priority for read and write operations for a specific AXI slave port. + * + * @base Physical address of the DDR Controller. + * @port Port number. Range is 0 to 3. + * @read_pri Priority for reads. Range is 0 to 3, where 0 is highest priority. + * @write_pri Priority for writes. Range is 0 to 3, where 0 is highest priority. + */ +void cdns_ddr_set_port_rw_priority(void *base, int port, + u8 read_pri, u8 write_pri); + +/** + * Specify address range for a protection entry, for a specific AXI slave port. + * + * @base Physical address of the DDR Controller. + * @port Port number. Range is 0 to 3. + * @entry The protection entry. Range is 0 to 15. + * @start_addr Physical of the address range, must be aligned to 16KB. + * @size Size of the address range, must be multiple of 16KB. + */ +void cdns_ddr_enable_port_addr_range(void *base, int port, int entry, + u32 addr_start, u32 size); + +/** + * Specify address range for a protection entry, for all AXI slave ports. + * + * @base Physical address of the DDR Controller. + * @entry The protection entry. Range is 0 to 15. + * @start_addr Physical of the address range, must be aligned to 16KB. + * @size Size of the address range, must be multiple of 16KB. + */ +void cdns_ddr_enable_addr_range(void *base, int entry, + u32 addr_start, u32 size); + +/** + * Specify protection entry details, for a specific AXI slave port. + * + * See the hardware manual for details of the range check bits. + * + * @base Physical address of the DDR Controller. + * @port Port number. Range is 0 to 3. + * @entry The protection entry. Range is 0 to 15. + */ +void cdns_ddr_enable_port_prot(void *base, int port, int entry, + enum cdns_ddr_range_prot range_protection_bits, + u16 range_RID_check_bits, + u16 range_WID_check_bits, + u8 range_RID_check_bits_ID_lookup, + u8 range_WID_check_bits_ID_lookup); + +/** + * Specify protection entry details, for all AXI slave ports. + * + * See the hardware manual for details of the range check bits. + * + * @base Physical address of the DDR Controller. + * @entry The protection entry. Range is 0 to 15. + */ +void cdns_ddr_enable_prot(void *base, int entry, + enum cdns_ddr_range_prot range_protection_bits, + u16 range_RID_check_bits, + u16 range_WID_check_bits, + u8 range_RID_check_bits_ID_lookup, + u8 range_WID_check_bits_ID_lookup); + +/** + * Specify bandwidth for each AXI port. + * + * See the hardware manual for details of the range check bits. + * + * @base Physical address of the DDR Controller. + * @port Port number. Range is 0 to 3. + * @max_percent 0 to 100. + */ +void cdns_ddr_set_port_bandwidth(void *base, int port, + u8 max_percent, u8 overflow_ok); + +/* Standard JEDEC registers */ +#define MODE_REGISTER_MASK (3 << 14) +#define MODE_REGISTER_MR0 (0 << 14) +#define MODE_REGISTER_MR1 (1 << 14) +#define MODE_REGISTER_MR2 (2 << 14) +#define MODE_REGISTER_MR3 (3 << 14) +#define MR1_DRIVE_STRENGTH_MASK ((1 << 5) | (1 << 1)) +#define MR1_DRIVE_STRENGTH_34_OHMS ((0 << 5) | (1 << 1)) +#define MR1_DRIVE_STRENGTH_40_OHMS ((0 << 5) | (0 << 1)) +#define MR1_ODT_IMPEDANCE_MASK ((1 << 9) | (1 << 6) | (1 << 2)) +#define MR1_ODT_IMPEDANCE_60_OHMS ((0 << 9) | (0 << 6) | (1 << 2)) +#define MR1_ODT_IMPEDANCE_120_OHMS ((0 << 9) | (1 << 6) | (0 << 2)) +#define MR1_ODT_IMPEDANCE_40_OHMS ((0 << 9) | (1 << 6) | (1 << 2)) +#define MR1_ODT_IMPEDANCE_20_OHMS ((1 << 9) | (0 << 6) | (0 << 2)) +#define MR1_ODT_IMPEDANCE_30_OHMS ((1 << 9) | (0 << 6) | (1 << 2)) +#define MR2_DYNAMIC_ODT_MASK (3 << 9) +#define MR2_DYNAMIC_ODT_OFF (0 << 9) +#define MR2_SELF_REFRESH_TEMP_MASK (1 << 7) +#define MR2_SELF_REFRESH_TEMP_EXT (1 << 7) + +/** + * Set certain fields of the JEDEC MR1 register. + */ +void cdns_ddr_set_mr1(void *base, int cs, u16 odt_impedance, u16 drive_strength); + +/** + * Set certain fields of the JEDEC MR2 register. + */ +void cdns_ddr_set_mr2(void *base, int cs, u16 dynamic_odt, u16 self_refresh_temp); + +/** + * Set ODT map of the DDR Controller. + */ +void cdns_ddr_set_odt_map(void *base, int cs, u16 odt_map); + +/** + * Set ODT settings in the DDR Controller. + */ +void cdns_ddr_set_odt_times(void *base, u8 TODTL_2CMD, u8 TODTH_WR, u8 TODTH_RD, + u8 WR_TO_ODTH, u8 RD_TO_ODTH); + +void cdns_ddr_set_same_cs_delays(void *base, u8 r2r, u8 r2w, u8 w2r, u8 w2w); +void cdns_ddr_set_diff_cs_delays(void *base, u8 r2r, u8 r2w, u8 w2r, u8 w2w); + +#endif |