9d31db2833
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>
115 lines
2.9 KiB
C
115 lines
2.9 KiB
C
/*
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* rt-loader board functions
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* (c) 2025 Markus Stockhausen
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*/
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#include "globals.h"
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#include "memory.h"
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#include "nanoprintf.h"
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#define UART_BUFFER_REG 0xb8002000
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#define UART_LINE_STATUS_REG 0xb8002014
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#define UART_TX_READY (1 << 29)
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#define RTL83XX_DRAM_CONFIG_REG 0xb8001004
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#define RTL838X_ENABLE_RW_MASK 0x3
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#define RTL838X_INT_RW_CTRL_REG 0xbb000058
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#define RTL838X_MODEL_NAME_INFO_REG 0xbb0000d4
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#define RTL839X_MODEL_NAME_INFO_REG 0xbb000ff0
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#define RTL83XX_CHIP_INFO_EN 0xa0000000
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#define RTL931X_DRAM_CONFIG_REG 0xb814304c
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#define RTL93XX_MODEL_NAME_INFO_REG 0xbb000004
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#define RTL93XX_CHIP_INFO_EN 0xa0000
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/*
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* board_putchar() is the central function to write to serial console of the device. This is
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* linked to printf() and the provider library via globals.h.
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*/
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void board_putchar(int ch, void *ctx)
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{
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while (!(ioread32(UART_LINE_STATUS_REG) & UART_TX_READY));
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iowrite32(((int)ch) << 24, UART_BUFFER_REG);
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if (ch == '\n')
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board_putchar('\r', ctx);
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}
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/*
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* board_get_memory() does what it is named after. On Realtek switches the DRAM config register
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* has information about bank count, bus width, ... From that the memory size can be derived.
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*/
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unsigned int board_get_memory(void)
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{
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unsigned int dcr, bits;
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if ((ioread32(RTL93XX_MODEL_NAME_INFO_REG) & 0xfffc0000) == 0x93100000) {
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dcr = ioread32(RTL931X_DRAM_CONFIG_REG);
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bits = (dcr >> 12) + ((dcr >> 6) & 0x3f) + (dcr & 0x3f);
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} else {
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dcr = ioread32(RTL83XX_DRAM_CONFIG_REG);
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bits = ((dcr >> 28) & 0x3) + ((dcr >> 24) & 0x3) +
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((dcr >> 20) & 0xf) + ((dcr >> 16) & 0xf) + 20;
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}
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return 1 << bits;
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}
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/*
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* board_get_system() generates a readable system name that will be printed during startup.
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* Formatting can be whatever is helpful.
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*/
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void board_get_system(char *buffer, int len)
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{
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unsigned int chip_id, model_id, model_version, chip_version;
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unsigned int reg, val, act;
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act = RTL93XX_CHIP_INFO_EN;
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reg = RTL93XX_MODEL_NAME_INFO_REG;
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val = ioread32(reg);
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if ((val & 0xffec0000) == 0x93000000)
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goto found;
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act = RTL83XX_CHIP_INFO_EN;
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reg = RTL839X_MODEL_NAME_INFO_REG;
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val = ioread32(reg);
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if ((val & 0xfff80000) == 0x83900000)
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goto found;
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iowrite32(0x3, RTL838X_INT_RW_CTRL_REG);
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reg = RTL838X_MODEL_NAME_INFO_REG;
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val = ioread32(reg);
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found:
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model_id = val >> 16;
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model_version = (val >> 11) & 0x1f;
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iowrite32(act, reg + 4);
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val = ioread32(reg + 4);
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chip_id = val & 0xffff;
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if (model_id < 0x9300)
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chip_version = val >> 16 & 0x1f;
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else
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chip_version = val >> 28 & 0x0f;
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snprintf(buffer, len, "RTL%04X%c (chip id %04x%c)",
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model_id, model_version ? model_version + 64 : 0,
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chip_id, chip_version ? chip_version + 64 : 0);
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}
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/*
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* board_panic() is called in critical cases. Whatever is needed can be done here. Maybe
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* an automatic reboot can be issued some day. For now just halt processing.
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*/
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void board_panic(void)
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{
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printf("halt system\n");
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while (1) {
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}
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}
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