mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-18 18:59:44 +00:00
9ffa7a35ef
This driver initializes PIC32 DDR2 SDRAM controller and internal DDR2 Phy module. DDR2 controller operates in half-rate mode (upto 533MHZ frequency). Signed-off-by: Paul Thacker <paul.thacker@microchip.com> Signed-off-by: Purna Chandra Mandal <purna.mandal@microchip.com> Reviewed-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com> Reviewed-by: Tom Rini <trini@konsulko.com> Reviewed-by: Simon Glass <sjg@chromium.org>
32 lines
894 B
C
32 lines
894 B
C
/*
|
|
* (c) 2015 Purna Chandra Mandal <purna.mandal@microchip.com>
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*
|
|
*/
|
|
|
|
#ifndef __MICROCHIP_PIC32_DDR_H
|
|
#define __MICROCHIP_PIC32_DDR_H
|
|
|
|
/* called by initdram() function */
|
|
void ddr2_phy_init(void);
|
|
void ddr2_ctrl_init(void);
|
|
phys_size_t ddr2_calculate_size(void);
|
|
|
|
/* Maximum number of agents */
|
|
#define NUM_AGENTS 5
|
|
|
|
/* Board can provide agent specific parameters for arbitration by
|
|
* filling struct ddr2_arbiter_params for all the agents and
|
|
* implementing board_get_ddr_arbiter_params() to return the filled
|
|
* structure.
|
|
*/
|
|
struct ddr2_arbiter_params {
|
|
u32 min_limit; /* min bursts to execute per arbitration */
|
|
u32 req_period; /* request period threshold for accepted cmds */
|
|
u32 min_cmd_acpt; /* min number of accepted cmds */
|
|
};
|
|
|
|
const struct ddr2_arbiter_params *board_get_ddr_arbiter_params(void);
|
|
|
|
#endif /* __MICROCHIP_PIC32_DDR_H */
|