^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * arch/powerpc/boot/ugecon.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * USB Gecko bootwrapper console.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (C) 2008-2009 The GameCube Linux Team
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Copyright (C) 2008,2009 Albert Herranz
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <stddef.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include "stdio.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include "types.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include "io.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include "ops.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #define EXI_CLK_32MHZ 5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #define EXI_CSR 0x00
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #define EXI_CSR_CLKMASK (0x7<<4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #define EXI_CSR_CLK_32MHZ (EXI_CLK_32MHZ<<4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #define EXI_CSR_CSMASK (0x7<<7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #define EXI_CSR_CS_0 (0x1<<7) /* Chip Select 001 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #define EXI_CR 0x0c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #define EXI_CR_TSTART (1<<0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #define EXI_CR_WRITE (1<<2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #define EXI_CR_READ_WRITE (2<<2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #define EXI_CR_TLEN(len) (((len)-1)<<4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #define EXI_DATA 0x10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) /* virtual address base for input/output, retrieved from device tree */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) static void *ug_io_base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) static u32 ug_io_transaction(u32 in)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) u32 *csr_reg = ug_io_base + EXI_CSR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) u32 *data_reg = ug_io_base + EXI_DATA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) u32 *cr_reg = ug_io_base + EXI_CR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) u32 csr, data, cr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) /* select */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) csr = EXI_CSR_CLK_32MHZ | EXI_CSR_CS_0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) out_be32(csr_reg, csr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) /* read/write */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) data = in;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) out_be32(data_reg, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) cr = EXI_CR_TLEN(2) | EXI_CR_READ_WRITE | EXI_CR_TSTART;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) out_be32(cr_reg, cr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) while (in_be32(cr_reg) & EXI_CR_TSTART)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) barrier();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) /* deselect */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) out_be32(csr_reg, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) data = in_be32(data_reg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) return data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) static int ug_is_txfifo_ready(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) return ug_io_transaction(0xc0000000) & 0x04000000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) static void ug_raw_putc(char ch)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) ug_io_transaction(0xb0000000 | (ch << 20));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) static void ug_putc(char ch)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) int count = 16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) if (!ug_io_base)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) while (!ug_is_txfifo_ready() && count--)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) barrier();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) if (count >= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) ug_raw_putc(ch);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) void ug_console_write(const char *buf, int len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) char *b = (char *)buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) while (len--) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) if (*b == '\n')
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) ug_putc('\r');
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) ug_putc(*b++);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) static int ug_is_adapter_present(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) if (!ug_io_base)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) return ug_io_transaction(0x90000000) == 0x04700000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) static void *ug_grab_exi_io_base(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) u32 v;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) void *devp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) devp = find_node_by_compatible(NULL, "nintendo,flipper-exi");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) if (devp == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) goto err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) if (getprop(devp, "virtual-reg", &v, sizeof(v)) != sizeof(v))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) goto err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) return (void *)v;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) err_out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) void *ug_probe(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) void *exi_io_base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) exi_io_base = ug_grab_exi_io_base();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) if (!exi_io_base)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) /* look for a usbgecko on memcard slots A and B */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) for (i = 0; i < 2; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) ug_io_base = exi_io_base + 0x14 * i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) if (ug_is_adapter_present())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) if (i == 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) ug_io_base = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) return ug_io_base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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