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realtek: add RTL931x support to rt-loader

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The RTL931x devices have an other register that describes the
current RAM configuration. Enhance the identification routine.

Tested on LGS352C (RTL9311).

Signed-off-by: Markus Stockhausen <markus.stockhausen@gmx.de>
Link: https://github.com/openwrt/openwrt/pull/19284
Signed-off-by: Robert Marko <robimarko@gmail.com>
This commit is contained in:
Markus Stockhausen 2025-07-02 12:35:27 -04:00 committed by Robert Marko
parent 7f939d99e7
commit 9d31db2833
1 changed files with 14 additions and 8 deletions
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22
target/linux/realtek/image/rt-loader/src/board.c
View file

@ -7,19 +7,21 @@
#include "memory.h"
#include "nanoprintf.h"
#define DRAM_CONFIG_REG 0xb8001004
#define UART_BUFFER_REG 0xb8002000
#define UART_LINE_STATUS_REG 0xb8002014
#define UART_TX_READY (1 << 29)
#define RTL83XX_DRAM_CONFIG_REG 0xb8001004
#define RTL838X_ENABLE_RW_MASK 0x3
#define RTL838X_INT_RW_CTRL_REG 0xbb000058
#define RTL838X_MODEL_NAME_INFO_REG 0xbb0000d4
#define RTL839X_MODEL_NAME_INFO_REG 0xbb000ff0
#define RTL83XX_CHIP_INFO_EN 0xa0000000
#define RTL931X_DRAM_CONFIG_REG 0xb814304c
#define RTL93XX_MODEL_NAME_INFO_REG 0xbb000004
#define RTL93XX_CHIP_INFO_EN 0xa0000
/*
* board_putchar() is the central function to write to serial console of the device. This is
* linked to printf() and the provider library via globals.h.
@ -41,14 +43,18 @@ void board_putchar(int ch, void *ctx)
unsigned int board_get_memory(void)
{
unsigned int dcr = ioread32(DRAM_CONFIG_REG);
char ROWCNTv[] = {11, 12, 13, 14, 15, 16};
char COLCNTv[] = {8, 9, 10, 11, 12};
char BNKCNTv[] = {1, 2, 3};
char BUSWIDv[] = {0, 1, 2};
unsigned int dcr, bits;
return 1 << (BNKCNTv[(dcr >> 28) & 0x3] + BUSWIDv[(dcr >> 24) & 0x3] +
ROWCNTv[(dcr >> 20) & 0xf] + COLCNTv[(dcr >> 16) & 0xf]);
if ((ioread32(RTL93XX_MODEL_NAME_INFO_REG) & 0xfffc0000) == 0x93100000) {
dcr = ioread32(RTL931X_DRAM_CONFIG_REG);
bits = (dcr >> 12) + ((dcr >> 6) & 0x3f) + (dcr & 0x3f);
} else {
dcr = ioread32(RTL83XX_DRAM_CONFIG_REG);
bits = ((dcr >> 28) & 0x3) + ((dcr >> 24) & 0x3) +
((dcr >> 20) & 0xf) + ((dcr >> 16) & 0xf) + 20;
}
return 1 << bits;
}
/*