netwinder-hw.c
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:11k
- /*
- * linux/arch/arm/mach-footbridge/netwinder-hw.c
- *
- * Netwinder machine fixup
- *
- * Copyright (C) 1998, 1999 Russell King, Phil Blundell
- */
- #include <linux/config.h>
- #include <linux/module.h>
- #include <linux/sched.h>
- #include <linux/ioport.h>
- #include <linux/kernel.h>
- #include <linux/delay.h>
- #include <linux/init.h>
- #include <asm/io.h>
- #include <asm/leds.h>
- #include <asm/mach-types.h>
- #define IRDA_IO_BASE 0x180
- #define GP1_IO_BASE 0x338
- #define GP2_IO_BASE 0x33a
- #ifdef CONFIG_LEDS
- #define DEFAULT_LEDS 0
- #else
- #define DEFAULT_LEDS GPIO_GREEN_LED
- #endif
- /*
- * Winbond WB83977F accessibility stuff
- */
- static inline void wb977_open(void)
- {
- outb(0x87, 0x370);
- outb(0x87, 0x370);
- }
- static inline void wb977_close(void)
- {
- outb(0xaa, 0x370);
- }
- static inline void wb977_wb(int reg, int val)
- {
- outb(reg, 0x370);
- outb(val, 0x371);
- }
- static inline void wb977_ww(int reg, int val)
- {
- outb(reg, 0x370);
- outb(val >> 8, 0x371);
- outb(reg + 1, 0x370);
- outb(val, 0x371);
- }
- #define wb977_device_select(dev) wb977_wb(0x07, dev)
- #define wb977_device_disable() wb977_wb(0x30, 0x00)
- #define wb977_device_enable() wb977_wb(0x30, 0x01)
- /*
- * This is a lock for accessing ports GP1_IO_BASE and GP2_IO_BASE
- */
- spinlock_t gpio_lock = SPIN_LOCK_UNLOCKED;
- static unsigned int current_gpio_op;
- static unsigned int current_gpio_io;
- static unsigned int current_cpld;
- void gpio_modify_op(int mask, int set)
- {
- unsigned int new_gpio, changed;
- new_gpio = (current_gpio_op & ~mask) | set;
- changed = new_gpio ^ current_gpio_op;
- current_gpio_op = new_gpio;
- if (changed & 0xff)
- outb(new_gpio, GP1_IO_BASE);
- if (changed & 0xff00)
- outb(new_gpio >> 8, GP2_IO_BASE);
- }
- static inline void __gpio_modify_io(int mask, int in)
- {
- unsigned int new_gpio, changed;
- int port;
- new_gpio = (current_gpio_io & ~mask) | in;
- changed = new_gpio ^ current_gpio_io;
- current_gpio_io = new_gpio;
- changed >>= 1;
- new_gpio >>= 1;
- wb977_device_select(7);
- for (port = 0xe1; changed && port < 0xe8; changed >>= 1) {
- wb977_wb(port, new_gpio & 1);
- port += 1;
- new_gpio >>= 1;
- }
- wb977_device_select(8);
- for (port = 0xe8; changed && port < 0xec; changed >>= 1) {
- wb977_wb(port, new_gpio & 1);
- port += 1;
- new_gpio >>= 1;
- }
- }
- void gpio_modify_io(int mask, int in)
- {
- /* Open up the SuperIO chip */
- wb977_open();
- __gpio_modify_io(mask, in);
- /* Close up the EFER gate */
- wb977_close();
- }
- int gpio_read(void)
- {
- return inb(GP1_IO_BASE) | inb(GP2_IO_BASE) << 8;
- }
- /*
- * Initialise the Winbond W83977F global registers
- */
- static inline void wb977_init_global(void)
- {
- /*
- * Enable R/W config registers
- */
- wb977_wb(0x26, 0x40);
- /*
- * Power down FDC (not used)
- */
- wb977_wb(0x22, 0xfe);
- /*
- * GP12, GP11, CIRRX, IRRXH, GP10
- */
- wb977_wb(0x2a, 0xc1);
- /*
- * GP23, GP22, GP21, GP20, GP13
- */
- wb977_wb(0x2b, 0x6b);
- /*
- * GP17, GP16, GP15, GP14
- */
- wb977_wb(0x2c, 0x55);
- }
- /*
- * Initialise the Winbond W83977F printer port
- */
- static inline void wb977_init_printer(void)
- {
- wb977_device_select(1);
- /*
- * mode 1 == EPP
- */
- wb977_wb(0xf0, 0x01);
- }
- /*
- * Initialise the Winbond W83977F keyboard controller
- */
- static inline void wb977_init_keyboard(void)
- {
- wb977_device_select(5);
- /*
- * Keyboard controller address
- */
- wb977_ww(0x60, 0x0060);
- wb977_ww(0x62, 0x0064);
- /*
- * Keyboard IRQ 1, active high, edge trigger
- */
- wb977_wb(0x70, 1);
- wb977_wb(0x71, 0x02);
- /*
- * Mouse IRQ 5, active high, edge trigger
- */
- wb977_wb(0x72, 5);
- wb977_wb(0x73, 0x02);
- /*
- * KBC 8MHz
- */
- wb977_wb(0xf0, 0x40);
- /*
- * Enable device
- */
- wb977_device_enable();
- }
- /*
- * Initialise the Winbond W83977F Infra-Red device
- */
- static inline void wb977_init_irda(void)
- {
- wb977_device_select(6);
- /*
- * IR base address
- */
- wb977_ww(0x60, IRDA_IO_BASE);
- /*
- * IRDA IRQ 6, active high, edge trigger
- */
- wb977_wb(0x70, 6);
- wb977_wb(0x71, 0x02);
- /*
- * RX DMA - ISA DMA 0
- */
- wb977_wb(0x74, 0x00);
- /*
- * TX DMA - Disable Tx DMA
- */
- wb977_wb(0x75, 0x04);
- /*
- * Append CRC, Enable bank selection
- */
- wb977_wb(0xf0, 0x03);
- /*
- * Enable device
- */
- wb977_device_enable();
- }
- /*
- * Initialise Winbond W83977F general purpose IO
- */
- static inline void wb977_init_gpio(void)
- {
- unsigned long flags;
- /*
- * Set up initial I/O definitions
- */
- current_gpio_io = -1;
- __gpio_modify_io(-1, GPIO_DONE | GPIO_WDTIMER);
- wb977_device_select(7);
- /*
- * Group1 base address
- */
- wb977_ww(0x60, GP1_IO_BASE);
- wb977_ww(0x62, 0);
- wb977_ww(0x64, 0);
- /*
- * GP10 (Orage button) IRQ 10, active high, edge trigger
- */
- wb977_wb(0x70, 10);
- wb977_wb(0x71, 0x02);
- /*
- * GP10: Debounce filter enabled, IRQ, input
- */
- wb977_wb(0xe0, 0x19);
- /*
- * Enable Group1
- */
- wb977_device_enable();
- wb977_device_select(8);
- /*
- * Group2 base address
- */
- wb977_ww(0x60, GP2_IO_BASE);
- /*
- * Clear watchdog timer regs
- * - timer disable
- */
- wb977_wb(0xf2, 0x00);
- /*
- * - disable LED, no mouse nor keyboard IRQ
- */
- wb977_wb(0xf3, 0x00);
- /*
- * - timer counting, disable power LED, disable timeouot
- */
- wb977_wb(0xf4, 0x00);
- /*
- * Enable group2
- */
- wb977_device_enable();
- /*
- * Set Group1/Group2 outputs
- */
- spin_lock_irqsave(&gpio_lock, flags);
- gpio_modify_op(-1, GPIO_RED_LED | GPIO_FAN);
- spin_unlock_irqrestore(&gpio_loc, flags);
- }
- /*
- * Initialise the Winbond W83977F chip.
- */
- static void __init wb977_init(void)
- {
- request_region(0x370, 2, "W83977AF configuration");
- /*
- * Open up the SuperIO chip
- */
- wb977_open();
- /*
- * Initialise the global registers
- */
- wb977_init_global();
- /*
- * Initialise the various devices in
- * the multi-IO chip.
- */
- wb977_init_printer();
- wb977_init_keyboard();
- wb977_init_irda();
- wb977_init_gpio();
- /*
- * Close up the EFER gate
- */
- wb977_close();
- }
- void cpld_modify(int mask, int set)
- {
- int msk;
- current_cpld = (current_cpld & ~mask) | set;
- gpio_modify_io(GPIO_DATA | GPIO_IOCLK | GPIO_IOLOAD, 0);
- gpio_modify_op(GPIO_IOLOAD, 0);
- for (msk = 8; msk; msk >>= 1) {
- int bit = current_cpld & msk;
- gpio_modify_op(GPIO_DATA | GPIO_IOCLK, bit ? GPIO_DATA : 0);
- gpio_modify_op(GPIO_IOCLK, GPIO_IOCLK);
- }
- gpio_modify_op(GPIO_IOCLK|GPIO_DATA, 0);
- gpio_modify_op(GPIO_IOLOAD|GPIO_DSCLK, GPIO_IOLOAD|GPIO_DSCLK);
- gpio_modify_op(GPIO_IOLOAD, 0);
- }
- static void __init cpld_init(void)
- {
- unsigned long flags;
- spin_lock_irqsave(&gpio_lock, flags);
- cpld_modify(-1, CPLD_UNMUTE | CPLD_7111_DISABLE);
- spin_unlock_irqrestore(&gpio_lock, flags);
- }
- static unsigned char rwa_unlock[] __initdata =
- { 0x00, 0x00, 0x6a, 0xb5, 0xda, 0xed, 0xf6, 0xfb, 0x7d, 0xbe, 0xdf, 0x6f, 0x37, 0x1b,
- 0x0d, 0x86, 0xc3, 0x61, 0xb0, 0x58, 0x2c, 0x16, 0x8b, 0x45, 0xa2, 0xd1, 0xe8, 0x74,
- 0x3a, 0x9d, 0xce, 0xe7, 0x73, 0x39 };
- #ifndef DEBUG
- #define dprintk(x...)
- #else
- #define dprintk(x...) printk(x)
- #endif
- #define WRITE_RWA(r,v) do { outb((r), 0x279); udelay(10); outb((v), 0xa79); } while (0)
- static inline void rwa010_unlock(void)
- {
- int i;
- WRITE_RWA(2, 2);
- mdelay(10);
- for (i = 0; i < sizeof(rwa_unlock); i++) {
- outb(rwa_unlock[i], 0x279);
- udelay(10);
- }
- }
- static inline void rwa010_read_ident(void)
- {
- unsigned char si[9];
- int i, j;
- WRITE_RWA(3, 0);
- WRITE_RWA(0, 128);
- outb(1, 0x279);
- mdelay(1);
- dprintk("Identifier: ");
- for (i = 0; i < 9; i++) {
- si[i] = 0;
- for (j = 0; j < 8; j++) {
- int bit;
- udelay(250);
- inb(0x203);
- udelay(250);
- bit = inb(0x203);
- dprintk("%02X ", bit);
- bit = (bit == 0xaa) ? 1 : 0;
- si[i] |= bit << j;
- }
- dprintk("(%02X) ", si[i]);
- }
- dprintk("n");
- }
- static inline void rwa010_global_init(void)
- {
- WRITE_RWA(6, 2); // Assign a card no = 2
- dprintk("Card no = %dn", inb(0x203));
- /* disable the modem section of the chip */
- WRITE_RWA(7, 3);
- WRITE_RWA(0x30, 0);
- /* disable the cdrom section of the chip */
- WRITE_RWA(7, 4);
- WRITE_RWA(0x30, 0);
- /* disable the MPU-401 section of the chip */
- WRITE_RWA(7, 2);
- WRITE_RWA(0x30, 0);
- }
- static inline void rwa010_game_port_init(void)
- {
- int i;
- WRITE_RWA(7, 5);
- dprintk("Slider base: ");
- WRITE_RWA(0x61, 1);
- i = inb(0x203);
- WRITE_RWA(0x60, 2);
- dprintk("%02X%02X (201)n", inb(0x203), i);
- WRITE_RWA(0x30, 1);
- }
- static inline void rwa010_waveartist_init(int base, int irq, int dma)
- {
- int i;
- WRITE_RWA(7, 0);
- dprintk("WaveArtist base: ");
- WRITE_RWA(0x61, base);
- i = inb(0x203);
- WRITE_RWA(0x60, base >> 8);
- dprintk("%02X%02X (%X),", inb(0x203), i, base);
- WRITE_RWA(0x70, irq);
- dprintk(" irq: %d (%d),", inb(0x203), irq);
- WRITE_RWA(0x74, dma);
- dprintk(" dma: %d (%d)n", inb(0x203), dma);
- WRITE_RWA(0x30, 1);
- }
- static inline void rwa010_soundblaster_init(int sb_base, int al_base, int irq, int dma)
- {
- int i;
- WRITE_RWA(7, 1);
- dprintk("SoundBlaster base: ");
- WRITE_RWA(0x61, sb_base);
- i = inb(0x203);
- WRITE_RWA(0x60, sb_base >> 8);
- dprintk("%02X%02X (%X),", inb(0x203), i, sb_base);
- dprintk(" irq: ");
- WRITE_RWA(0x70, irq);
- dprintk("%d (%d),", inb(0x203), irq);
- dprintk(" 8-bit DMA: ");
- WRITE_RWA(0x74, dma);
- dprintk("%d (%d)n", inb(0x203), dma);
- dprintk("AdLib base: ");
- WRITE_RWA(0x63, al_base);
- i = inb(0x203);
- WRITE_RWA(0x62, al_base >> 8);
- dprintk("%02X%02X (%X)n", inb(0x203), i, al_base);
- WRITE_RWA(0x30, 1);
- }
- static void rwa010_soundblaster_reset(void)
- {
- int i;
- outb(1, 0x226);
- udelay(3);
- outb(0, 0x226);
- for (i = 0; i < 5; i++) {
- if (inb(0x22e) & 0x80)
- break;
- mdelay(1);
- }
- if (i == 5)
- printk("SoundBlaster: DSP reset failedn");
- dprintk("SoundBlaster DSP reset: %02X (AA)n", inb(0x22a));
- for (i = 0; i < 5; i++) {
- if ((inb(0x22c) & 0x80) == 0)
- break;
- mdelay(1);
- }
- if (i == 5)
- printk("SoundBlaster: DSP not readyn");
- else {
- outb(0xe1, 0x22c);
- dprintk("SoundBlaster DSP id: ");
- i = inb(0x22a);
- udelay(1);
- i |= inb(0x22a) << 8;
- dprintk("%04Xn", i);
- for (i = 0; i < 5; i++) {
- if ((inb(0x22c) & 0x80) == 0)
- break;
- mdelay(1);
- }
- if (i == 5)
- printk("SoundBlaster: could not turn speaker offn");
- outb(0xd3, 0x22c);
- }
- /* turn on OPL3 */
- outb(5, 0x38a);
- outb(1, 0x38b);
- }
- static void __init rwa010_init(void)
- {
- rwa010_unlock();
- rwa010_read_ident();
- rwa010_global_init();
- rwa010_game_port_init();
- rwa010_waveartist_init(0x250, 3, 7);
- rwa010_soundblaster_init(0x220, 0x388, 3, 1);
- rwa010_soundblaster_reset();
- }
- EXPORT_SYMBOL(gpio_lock);
- EXPORT_SYMBOL(gpio_modify_op);
- EXPORT_SYMBOL(gpio_modify_io);
- EXPORT_SYMBOL(cpld_modify);
- /*
- * Initialise any other hardware after we've got the PCI bus
- * initialised. We may need the PCI bus to talk to this other
- * hardware.
- */
- static int __init nw_hw_init(void)
- {
- if (machine_is_netwinder()) {
- unsigned long flags;
- wb977_init();
- cpld_init();
- rwa010_init();
- spin_lock_irqsave(&gpio_lock, flags);
- gpio_modify_op(GPIO_RED_LED|GPIO_GREEN_LED, DEFAULT_LEDS);
- spin_unlock_irqrestore(&gpio_lock, flags);
- }
- return 0;
- }
- __initcall(nw_hw_init);