diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/powerpc/platforms/embedded6xx/usbgecko_udbg.c')
| -rw-r--r-- | ANDROID_3.4.5/arch/powerpc/platforms/embedded6xx/usbgecko_udbg.c | 328 |
1 files changed, 0 insertions, 328 deletions
diff --git a/ANDROID_3.4.5/arch/powerpc/platforms/embedded6xx/usbgecko_udbg.c b/ANDROID_3.4.5/arch/powerpc/platforms/embedded6xx/usbgecko_udbg.c deleted file mode 100644 index 20a8ed91..00000000 --- a/ANDROID_3.4.5/arch/powerpc/platforms/embedded6xx/usbgecko_udbg.c +++ /dev/null @@ -1,328 +0,0 @@ -/* - * arch/powerpc/platforms/embedded6xx/usbgecko_udbg.c - * - * udbg serial input/output routines for the USB Gecko adapter. - * Copyright (C) 2008-2009 The GameCube Linux Team - * Copyright (C) 2008,2009 Albert Herranz - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version 2 - * of the License, or (at your option) any later version. - * - */ - -#include <mm/mmu_decl.h> - -#include <asm/io.h> -#include <asm/prom.h> -#include <asm/udbg.h> -#include <asm/fixmap.h> - -#include "usbgecko_udbg.h" - - -#define EXI_CLK_32MHZ 5 - -#define EXI_CSR 0x00 -#define EXI_CSR_CLKMASK (0x7<<4) -#define EXI_CSR_CLK_32MHZ (EXI_CLK_32MHZ<<4) -#define EXI_CSR_CSMASK (0x7<<7) -#define EXI_CSR_CS_0 (0x1<<7) /* Chip Select 001 */ - -#define EXI_CR 0x0c -#define EXI_CR_TSTART (1<<0) -#define EXI_CR_WRITE (1<<2) -#define EXI_CR_READ_WRITE (2<<2) -#define EXI_CR_TLEN(len) (((len)-1)<<4) - -#define EXI_DATA 0x10 - -#define UG_READ_ATTEMPTS 100 -#define UG_WRITE_ATTEMPTS 100 - - -static void __iomem *ug_io_base; - -/* - * Performs one input/output transaction between the exi host and the usbgecko. - */ -static u32 ug_io_transaction(u32 in) -{ - u32 __iomem *csr_reg = ug_io_base + EXI_CSR; - u32 __iomem *data_reg = ug_io_base + EXI_DATA; - u32 __iomem *cr_reg = ug_io_base + EXI_CR; - u32 csr, data, cr; - - /* select */ - csr = EXI_CSR_CLK_32MHZ | EXI_CSR_CS_0; - out_be32(csr_reg, csr); - - /* read/write */ - data = in; - out_be32(data_reg, data); - cr = EXI_CR_TLEN(2) | EXI_CR_READ_WRITE | EXI_CR_TSTART; - out_be32(cr_reg, cr); - - while (in_be32(cr_reg) & EXI_CR_TSTART) - barrier(); - - /* deselect */ - out_be32(csr_reg, 0); - - /* result */ - data = in_be32(data_reg); - - return data; -} - -/* - * Returns true if an usbgecko adapter is found. - */ -static int ug_is_adapter_present(void) -{ - if (!ug_io_base) - return 0; - - return ug_io_transaction(0x90000000) == 0x04700000; -} - -/* - * Returns true if the TX fifo is ready for transmission. - */ -static int ug_is_txfifo_ready(void) -{ - return ug_io_transaction(0xc0000000) & 0x04000000; -} - -/* - * Tries to transmit a character. - * If the TX fifo is not ready the result is undefined. - */ -static void ug_raw_putc(char ch) -{ - ug_io_transaction(0xb0000000 | (ch << 20)); -} - -/* - * Transmits a character. - * It silently fails if the TX fifo is not ready after a number of retries. - */ -static void ug_putc(char ch) -{ - int count = UG_WRITE_ATTEMPTS; - - if (!ug_io_base) - return; - - if (ch == '\n') - ug_putc('\r'); - - while (!ug_is_txfifo_ready() && count--) - barrier(); - if (count >= 0) - ug_raw_putc(ch); -} - -/* - * Returns true if the RX fifo is ready for transmission. - */ -static int ug_is_rxfifo_ready(void) -{ - return ug_io_transaction(0xd0000000) & 0x04000000; -} - -/* - * Tries to receive a character. - * If a character is unavailable the function returns -1. - */ -static int ug_raw_getc(void) -{ - u32 data = ug_io_transaction(0xa0000000); - if (data & 0x08000000) - return (data >> 16) & 0xff; - else - return -1; -} - -/* - * Receives a character. - * It fails if the RX fifo is not ready after a number of retries. - */ -static int ug_getc(void) -{ - int count = UG_READ_ATTEMPTS; - - if (!ug_io_base) - return -1; - - while (!ug_is_rxfifo_ready() && count--) - barrier(); - return ug_raw_getc(); -} - -/* - * udbg functions. - * - */ - -/* - * Transmits a character. - */ -void ug_udbg_putc(char ch) -{ - ug_putc(ch); -} - -/* - * Receives a character. Waits until a character is available. - */ -static int ug_udbg_getc(void) -{ - int ch; - - while ((ch = ug_getc()) == -1) - barrier(); - return ch; -} - -/* - * Receives a character. If a character is not available, returns -1. - */ -static int ug_udbg_getc_poll(void) -{ - if (!ug_is_rxfifo_ready()) - return -1; - return ug_getc(); -} - -/* - * Retrieves and prepares the virtual address needed to access the hardware. - */ -static void __iomem *ug_udbg_setup_exi_io_base(struct device_node *np) -{ - void __iomem *exi_io_base = NULL; - phys_addr_t paddr; - const unsigned int *reg; - - reg = of_get_property(np, "reg", NULL); - if (reg) { - paddr = of_translate_address(np, reg); - if (paddr) - exi_io_base = ioremap(paddr, reg[1]); - } - return exi_io_base; -} - -/* - * Checks if a USB Gecko adapter is inserted in any memory card slot. - */ -static void __iomem *ug_udbg_probe(void __iomem *exi_io_base) -{ - int i; - - /* look for a usbgecko on memcard slots A and B */ - for (i = 0; i < 2; i++) { - ug_io_base = exi_io_base + 0x14 * i; - if (ug_is_adapter_present()) - break; - } - if (i == 2) - ug_io_base = NULL; - return ug_io_base; - -} - -/* - * USB Gecko udbg support initialization. - */ -void __init ug_udbg_init(void) -{ - struct device_node *np; - void __iomem *exi_io_base; - - if (ug_io_base) - udbg_printf("%s: early -> final\n", __func__); - - np = of_find_compatible_node(NULL, NULL, "nintendo,flipper-exi"); - if (!np) { - udbg_printf("%s: EXI node not found\n", __func__); - goto done; - } - - exi_io_base = ug_udbg_setup_exi_io_base(np); - if (!exi_io_base) { - udbg_printf("%s: failed to setup EXI io base\n", __func__); - goto done; - } - - if (!ug_udbg_probe(exi_io_base)) { - udbg_printf("usbgecko_udbg: not found\n"); - iounmap(exi_io_base); - } else { - udbg_putc = ug_udbg_putc; - udbg_getc = ug_udbg_getc; - udbg_getc_poll = ug_udbg_getc_poll; - udbg_printf("usbgecko_udbg: ready\n"); - } - -done: - if (np) - of_node_put(np); - return; -} - -#ifdef CONFIG_PPC_EARLY_DEBUG_USBGECKO - -static phys_addr_t __init ug_early_grab_io_addr(void) -{ -#if defined(CONFIG_GAMECUBE) - return 0x0c000000; -#elif defined(CONFIG_WII) - return 0x0d000000; -#else -#error Invalid platform for USB Gecko based early debugging. -#endif -} - -/* - * USB Gecko early debug support initialization for udbg. - */ -void __init udbg_init_usbgecko(void) -{ - void __iomem *early_debug_area; - void __iomem *exi_io_base; - - /* - * At this point we have a BAT already setup that enables I/O - * to the EXI hardware. - * - * The BAT uses a virtual address range reserved at the fixmap. - * This must match the virtual address configured in - * head_32.S:setup_usbgecko_bat(). - */ - early_debug_area = (void __iomem *)__fix_to_virt(FIX_EARLY_DEBUG_BASE); - exi_io_base = early_debug_area + 0x00006800; - - /* try to detect a USB Gecko */ - if (!ug_udbg_probe(exi_io_base)) - return; - - /* we found a USB Gecko, load udbg hooks */ - udbg_putc = ug_udbg_putc; - udbg_getc = ug_udbg_getc; - udbg_getc_poll = ug_udbg_getc_poll; - - /* - * Prepare again the same BAT for MMU_init. - * This allows udbg I/O to continue working after the MMU is - * turned on for real. - * It is safe to continue using the same virtual address as it is - * a reserved fixmap area. - */ - setbat(1, (unsigned long)early_debug_area, - ug_early_grab_io_addr(), 128*1024, PAGE_KERNEL_NCG); -} - -#endif /* CONFIG_PPC_EARLY_DEBUG_USBGECKO */ - |