/* * (C) Copyright 2002 * Daniel Engström, Omicron Ceti AB <daniel@omicron.se>. * * SPDX-License-Identifier: GPL-2.0+ */ /* * Based on sc520cdp.c from rolo 1.6: *---------------------------------------------------------------------- * (C) Copyright 2000 * Sysgo Real-Time Solutions GmbH * Klein-Winternheim, Germany *---------------------------------------------------------------------- */ #include <config.h> #include <common.h> #include <asm/io.h> #include <ali512x.h> /* ALI M5123 Logical device numbers: * 0 FDC * 1 unused? * 2 unused? * 3 lpt * 4 UART1 * 5 UART2 * 6 RTC * 7 mouse/kbd * 8 CIO */ /* ************************************************************ * Some access primitives for the ALi chip: * ************************************************************ */ static void ali_write(u8 index, u8 value) { /* write an arbirary register */ outb(index, ALI_INDEX); outb(value, ALI_DATA); } #if 0 static int ali_read(u8 index) { outb(index, ALI_INDEX); return inb(ALI_DATA); } #endif #define ALI_OPEN() \ outb(0x51, ALI_INDEX); \ outb(0x23, ALI_INDEX) #define ALI_CLOSE() \ outb(0xbb, ALI_INDEX) /* Select a logical device */ #define ALI_SELDEV(dev) \ ali_write(0x07, dev) void ali512x_init(void) { ALI_OPEN(); ali_write(0x02, 0x01); /* soft reset */ ali_write(0x03, 0x03); /* disable access to CIOs */ ali_write(0x22, 0x00); /* disable direct powerdown */ ali_write(0x23, 0x00); /* disable auto powerdown */ ali_write(0x24, 0x00); /* IR 8 is active hi, pin26 is PDIR */ ALI_CLOSE(); } void ali512x_set_fdc(int enabled, u16 io, u8 irq, u8 dma_channel) { ALI_OPEN(); ALI_SELDEV(0); ali_write(0x30, enabled?1:0); if (enabled) { ali_write(0x60, io >> 8); ali_write(0x61, io & 0xff); ali_write(0x70, irq); ali_write(0x74, dma_channel); /* AT mode, no drive swap */ ali_write(0xf0, 0x08); ali_write(0xf1, 0x00); ali_write(0xf2, 0xff); ali_write(0xf4, 0x00); } ALI_CLOSE(); } void ali512x_set_pp(int enabled, u16 io, u8 irq, u8 dma_channel) { ALI_OPEN(); ALI_SELDEV(3); ali_write(0x30, enabled?1:0); if (enabled) { ali_write(0x60, io >> 8); ali_write(0x61, io & 0xff); ali_write(0x70, irq); ali_write(0x74, dma_channel); /* mode: EPP 1.9, ECP FIFO threshold = 7, IRQ active low */ ali_write(0xf0, 0xbc); /* 12 MHz, Burst DMA in ECP */ ali_write(0xf1, 0x05); } ALI_CLOSE(); } void ali512x_set_uart(int enabled, int index, u16 io, u8 irq) { ALI_OPEN(); ALI_SELDEV(index?5:4); ali_write(0x30, enabled?1:0); if (enabled) { ali_write(0x60, io >> 8); ali_write(0x61, io & 0xff); ali_write(0x70, irq); ali_write(0xf0, 0x00); ali_write(0xf1, 0x00); /* huh? write 0xf2 twice - a typo in rolo * or some secret ali errata? Who knows? */ if (index) { ali_write(0xf2, 0x00); } ali_write(0xf2, 0x0c); } ALI_CLOSE(); } void ali512x_set_uart2_irda(int enabled) { ALI_OPEN(); ALI_SELDEV(5); ali_write(0xf1, enabled?0x48:0x00); /* fullduplex IrDa */ ALI_CLOSE(); } void ali512x_set_rtc(int enabled, u16 io, u8 irq) { ALI_OPEN(); ALI_SELDEV(6); ali_write(0x30, enabled?1:0); if (enabled) { ali_write(0x60, io >> 8); ali_write(0x61, io & 0xff); ali_write(0x70, irq); ali_write(0xf0, 0x00); } ALI_CLOSE(); } void ali512x_set_kbc(int enabled, u8 kbc_irq, u8 mouse_irq) { ALI_OPEN(); ALI_SELDEV(7); ali_write(0x30, enabled?1:0); if (enabled) { ali_write(0x70, kbc_irq); ali_write(0x72, mouse_irq); ali_write(0xf0, 0x00); } ALI_CLOSE(); } /* Common I/O * * (This descripotsion is base on several incompete sources * since I have not been able to obtain any datasheet for the device * there may be some mis-understandings burried in here. * -- Daniel daniel@omicron.se) * * There are 22 CIO pins numbered * 10-17 * 20-25 * 30-37 * * 20-24 are dedicated CIO pins, the other 17 are muliplexed with * other functions. * * Secondary * CIO Pin Function Decription * ======================================================= * CIO10 IRQIN1 Interrupt input 1? * CIO11 IRQIN2 Interrupt input 2? * CIO12 IRRX IrDa Receive * CIO13 IRTX IrDa Transmit * CIO14 P21 KBC P21 fucntion * CIO15 P20 KBC P21 fucntion * CIO16 I2C_CLK I2C Clock * CIO17 I2C_DAT I2C Data * * CIO20 - * CIO21 - * CIO22 - * CIO23 - * CIO24 - * CIO25 LOCK Keylock * * CIO30 KBC_CLK Keybaord Clock * CIO31 CS0J General Chip Select decoder CS0J * CIO32 CS1J General Chip Select decoder CS1J * CIO33 ALT_KCLK Alternative Keyboard Clock * CIO34 ALT_KDAT Alternative Keyboard Data * CIO35 ALT_MCLK Alternative Mouse Clock * CIO36 ALT_MDAT Alternative Mouse Data * CIO37 ALT_KBC Alternative KBC select * * The CIO use an indirect address scheme. * * Reigster 3 in the SIO is used to select the index and data * port addresses where the CIO I/O registers show up. * The function selection registers are accessible under * function SIO 8. * * SIO reigster 3 (CIO Address Selection) bit definitions: * bit 7 CIO index and data registers enabled * bit 1-0 CIO indirect registers port address select * 0 index = 0xE0 data = 0xE1 * 1 index = 0xE2 data = 0xE3 * 2 index = 0xE4 data = 0xE5 * 3 index = 0xEA data = 0xEB * * There are three CIO I/O register accessed via CIO index port and CIO data port * 0x01 CIO 10-17 data * 0x02 CIO 20-25 data (bits 7-6 unused) * 0x03 CIO 30-37 data * * * The pin function is accessed through normal * SIO registers, each register have the same format: * * Bit Function Value * 0 Input/output 1=input * 1 Polarity of signal 1=inverted * 2 Unused ?? * 3 Function (normal or special) 1=special * 7-4 Unused * * SIO REG * 0xe0 CIO 10 Config * 0xe1 CIO 11 Config * 0xe2 CIO 12 Config * 0xe3 CIO 13 Config * 0xe4 CIO 14 Config * 0xe5 CIO 15 Config * 0xe6 CIO 16 Config * 0xe7 CIO 16 Config * * 0xe8 CIO 20 Config * 0xe9 CIO 21 Config * 0xea CIO 22 Config * 0xeb CIO 23 Config * 0xec CIO 24 Config * 0xed CIO 25 Config * * 0xf5 CIO 30 Config * 0xf6 CIO 31 Config * 0xf7 CIO 32 Config * 0xf8 CIO 33 Config * 0xf9 CIO 34 Config * 0xfa CIO 35 Config * 0xfb CIO 36 Config * 0xfc CIO 37 Config * */ #define ALI_CIO_PORT_SEL 0x83 #define ALI_CIO_INDEX 0xea #define ALI_CIO_DATA 0xeb void ali512x_set_cio(int enabled) { int i; ALI_OPEN(); if (enabled) { ali_write(0x3, ALI_CIO_PORT_SEL); /* Enable CIO data register */ } else { ali_write(0x3, ALI_CIO_PORT_SEL & ~0x80); } ALI_SELDEV(8); ali_write(0x30, enabled?1:0); /* set all pins to input to start with */ for (i=0xe0;i<0xee;i++) { ali_write(i, 1); } for (i=0xf5;i<0xfe;i++) { ali_write(i, 1); } ALI_CLOSE(); } void ali512x_cio_function(int pin, int special, int inv, int input) { u8 data; u8 addr; /* valid pins are 10-17, 20-25 and 30-37 */ if (pin >= 10 && pin <= 17) { addr = 0xe0+(pin&7); } else if (pin >= 20 && pin <= 25) { addr = 0xe8+(pin&7); } else if (pin >= 30 && pin <= 37) { addr = 0xf5+(pin&7); } else { return; } ALI_OPEN(); ALI_SELDEV(8); data=0xf4; if (special) { data |= 0x08; } else { if (inv) { data |= 0x02; } if (input) { data |= 0x01; } } ali_write(addr, data); ALI_CLOSE(); } void ali512x_cio_out(int pin, int value) { u8 reg; u8 data; u8 bit; reg = pin/10; bit = 1 << (pin%10); outb(reg, ALI_CIO_INDEX); /* select I/O register */ data = inb(ALI_CIO_DATA); if (value) { data |= bit; } else { data &= ~bit; } outb(data, ALI_CIO_DATA); } int ali512x_cio_in(int pin) { u8 reg; u8 data; u8 bit; /* valid pins are 10-17, 20-25 and 30-37 */ reg = pin/10; bit = 1 << (pin%10); outb(reg, ALI_CIO_INDEX); /* select I/O register */ data = inb(ALI_CIO_DATA); return data & bit; }