ide-sibyte.c
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上传日期:2013-04-10
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- /*
- * Copyright (C) 2001 Broadcom Corporation
- *
- * 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.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- */
- /* Derived loosely from ide-pmac.c, so:
- *
- * Copyright (C) 1998 Paul Mackerras.
- * Copyright (C) 1995-1998 Mark Lord
- */
- #include <linux/config.h>
- #include <linux/types.h>
- #include <linux/kernel.h>
- #include <linux/sched.h>
- #include <linux/init.h>
- #include <linux/delay.h>
- #include <linux/ide.h>
- #include <asm/irq.h>
- #include <asm/io.h>
- #include <asm/sibyte/sb1250_regs.h>
- #include <asm/sibyte/sb1250_int.h>
- #include <asm/sibyte/sb1250_genbus.h>
- #include <asm/sibyte/64bit.h>
- #include <asm/sibyte/board.h>
- /* Note: this should be general for any board using IDE on GenBus */
- extern struct ide_ops std_ide_ops;
- static ide_hwif_t *sb_ide_hwif = NULL;
- static unsigned long ide_base;
- #define SIBYTE_IDE_BASE (KSEG1ADDR(ide_base)-mips_io_port_base)
- #define SIBYTE_IDE_REG(pcaddr) (SIBYTE_IDE_BASE + ((pcaddr)<<5))
- /*
- * We are limiting the number of PCI-IDE devices to leave room for
- * GenBus IDE (and possibly PCMCIA/CF?)
- */
- static int sibyte_ide_default_irq(ide_ioreg_t base)
- {
- return 0;
- }
- static ide_ioreg_t sibyte_ide_default_io_base(int index)
- {
- return 0;
- }
- static void sibyte_ide_init_hwif_ports (hw_regs_t *hw, ide_ioreg_t data_port,
- ide_ioreg_t ctrl_port, int *irq)
- {
- std_ide_ops.ide_init_hwif_ports(hw, data_port, ctrl_port, irq);
- }
- static int sibyte_ide_request_irq(unsigned int irq,
- void (*handler)(int,void *, struct pt_regs *),
- unsigned long flags, const char *device,
- void *dev_id)
- {
- return request_irq(irq, handler, flags, device, dev_id);
- }
- static void sibyte_ide_free_irq(unsigned int irq, void *dev_id)
- {
- free_irq(irq, dev_id);
- }
- static inline int is_sibyte_ide(ide_ioreg_t from)
- {
- return (sb_ide_hwif &&
- ((from == sb_ide_hwif->io_ports[IDE_DATA_OFFSET]) ||
- (from == sb_ide_hwif->io_ports[IDE_ERROR_OFFSET]) ||
- (from == sb_ide_hwif->io_ports[IDE_NSECTOR_OFFSET]) ||
- (from == sb_ide_hwif->io_ports[IDE_SECTOR_OFFSET]) ||
- (from == sb_ide_hwif->io_ports[IDE_LCYL_OFFSET]) ||
- (from == sb_ide_hwif->io_ports[IDE_HCYL_OFFSET]) ||
- (from == sb_ide_hwif->io_ports[IDE_SELECT_OFFSET]) ||
- (from == sb_ide_hwif->io_ports[IDE_STATUS_OFFSET]) ||
- (from == sb_ide_hwif->io_ports[IDE_CONTROL_OFFSET])));
- }
- static int sibyte_ide_check_region(ide_ioreg_t from, unsigned int extent)
- {
- /* Figure out if it's the SiByte IDE; if so, don't do anything
- since our I/O space is in a weird place. */
- if (is_sibyte_ide(from))
- return 0;
- else
- #ifdef CONFIG_BLK_DEV_IDE
- return std_ide_ops.ide_check_region(from, extent);
- #else
- return 0;
- #endif
- }
- static void sibyte_ide_request_region(ide_ioreg_t from, unsigned int extent,
- const char *name)
- {
- #ifdef CONFIG_BLK_DEV_IDE
- if (!is_sibyte_ide(from))
- std_ide_ops.ide_request_region(from, extent, name);
- #endif
- }
- static void sibyte_ide_release_region(ide_ioreg_t from, unsigned int extent)
- {
- #ifdef CONFIG_BLK_DEV_IDE
- if (!is_sibyte_ide(from))
- std_ide_ops.ide_release_region(from, extent);
- #endif
- }
- struct ide_ops sibyte_ide_ops = {
- &sibyte_ide_default_irq,
- &sibyte_ide_default_io_base,
- &sibyte_ide_init_hwif_ports,
- &sibyte_ide_request_irq,
- &sibyte_ide_free_irq,
- &sibyte_ide_check_region,
- &sibyte_ide_request_region,
- &sibyte_ide_release_region
- };
- /*
- * I/O operations. The FPGA for SiByte generic bus IDE deals with
- * byte-swapping for us, so we can't share the I/O macros with other
- * IDE (e.g. PCI-IDE) devices.
- */
- #define sibyte_outb(val,port)
- do {
- *(volatile u8 *)(mips_io_port_base + (port)) = val;
- } while(0)
- #define sibyte_outw(val,port)
- do {
- *(volatile u16 *)(mips_io_port_base + (port)) = val;
- } while(0)
- #define sibyte_outl(val,port)
- do {
- *(volatile u32 *)(mips_io_port_base + (port)) = val;
- } while(0)
- static inline unsigned char sibyte_inb(unsigned long port)
- {
- return (*(volatile u8 *)(mips_io_port_base + (port)));
- }
- static inline unsigned short sibyte_inw(unsigned long port)
- {
- return (*(volatile u16 *)(mips_io_port_base + (port)));
- }
- static inline unsigned int sibyte_inl(unsigned long port)
- {
- return (*(volatile u32 *)(mips_io_port_base + (port)));
- }
- static inline void sibyte_outsb(unsigned long port, void *addr, unsigned int count)
- {
- while (count--) {
- sibyte_outb(*(u8 *)addr, port);
- addr++;
- }
- }
- static inline void sibyte_insb(unsigned long port, void *addr, unsigned int count)
- {
- while (count--) {
- *(u8 *)addr = sibyte_inb(port);
- addr++;
- }
- }
- static inline void sibyte_outsw(unsigned long port, void *addr, unsigned int count)
- {
- while (count--) {
- sibyte_outw(*(u16 *)addr, port);
- addr += 2;
- }
- }
- static inline void sibyte_insw(unsigned long port, void *addr, unsigned int count)
- {
- while (count--) {
- *(u16 *)addr = sibyte_inw(port);
- addr += 2;
- }
- }
- static inline void sibyte_outsl(unsigned long port, void *addr, unsigned int count)
- {
- while (count--) {
- sibyte_outl(*(u32 *)addr, port);
- addr += 4;
- }
- }
- static inline void sibyte_insl(unsigned long port, void *addr, unsigned int count)
- {
- while (count--) {
- *(u32 *)addr = sibyte_inl(port);
- addr += 4;
- }
- }
- static void sibyte_ideproc(ide_ide_action_t action, ide_drive_t *drive,
- void *buffer, unsigned int count)
- {
- /* slow? vlb_sync? */
- switch (action) {
- case ideproc_ide_input_data:
- if (drive->io_32bit) {
- sibyte_insl(IDE_DATA_REG, buffer, count);
- } else {
- sibyte_insw(IDE_DATA_REG, buffer, count<<1);
- }
- break;
- case ideproc_ide_output_data:
- if (drive->io_32bit) {
- sibyte_outsl(IDE_DATA_REG, buffer, count);
- } else {
- sibyte_outsw(IDE_DATA_REG, buffer, count<<1);
- }
- break;
- case ideproc_atapi_input_bytes:
- count++;
- if (drive->io_32bit) {
- sibyte_insl(IDE_DATA_REG, buffer, count>>2);
- } else {
- sibyte_insw(IDE_DATA_REG, buffer, count>>1);
- }
- if ((count & 3) >= 2)
- sibyte_insw(IDE_DATA_REG, (char *)buffer + (count & ~3), 1);
- break;
- case ideproc_atapi_output_bytes:
- count++;
- if (drive->io_32bit) {
- sibyte_outsl(IDE_DATA_REG, buffer, count>>2);
- } else {
- sibyte_outsw(IDE_DATA_REG, buffer, count>>1);
- }
- if ((count & 3) >= 2)
- sibyte_outsw(IDE_DATA_REG, (char *)buffer + (count & ~3), 1);
- break;
- }
- }
- /*
- * selectproc and intrproc aren't really necessary, since
- * byte-swapping doesn't affect byte ops; they are included for
- * consistency.
- */
- static void sibyte_selectproc(ide_drive_t *drive)
- {
- sibyte_outb(drive->select.all, IDE_SELECT_REG);
- }
- static void sibyte_intrproc(ide_drive_t *drive)
- {
- sibyte_outb(drive->ctl|2, IDE_CONTROL_REG);
- }
- void __init sibyte_ide_probe(void)
- {
- int i;
- ide_hwif_t *hwif;
- /*
- * Find the first untaken slot in hwifs
- */
- for (i = 0; i < MAX_HWIFS; i++) {
- if (!ide_hwifs[i].io_ports[IDE_DATA_OFFSET]) {
- break;
- }
- }
- if (i == MAX_HWIFS) {
- printk("No space for SiByte onboard IDE driver in ide_hwifs[]. Not enabled.n");
- return;
- }
- /* Find memory base address */
- #ifdef __MIPSEL__
- /* Pass1 workaround (bug 1624) */
- if (sb1250_pass == K_SYS_REVISION_PASS1)
- ide_base = G_IO_START_ADDR(csr_in32(4+(IO_SPACE_BASE|A_IO_EXT_REG(R_IO_EXT_REG(R_IO_EXT_START_ADDR, IDE_CS))))) << S_IO_ADDRBASE;
- else
- #endif
- ide_base = G_IO_START_ADDR(csr_in32(IO_SPACE_BASE|A_IO_EXT_REG(R_IO_EXT_REG(R_IO_EXT_START_ADDR, IDE_CS)))) << S_IO_ADDRBASE;
- /*
- * Set up our stuff; we're a little odd because our io_ports
- * aren't in the usual place, and byte-swapping isn't
- * necessary.
- */
- hwif = &ide_hwifs[i];
- hwif->hw.io_ports[IDE_DATA_OFFSET] = SIBYTE_IDE_REG(0x1f0);
- hwif->hw.io_ports[IDE_ERROR_OFFSET] = SIBYTE_IDE_REG(0x1f1);
- hwif->hw.io_ports[IDE_NSECTOR_OFFSET] = SIBYTE_IDE_REG(0x1f2);
- hwif->hw.io_ports[IDE_SECTOR_OFFSET] = SIBYTE_IDE_REG(0x1f3);
- hwif->hw.io_ports[IDE_LCYL_OFFSET] = SIBYTE_IDE_REG(0x1f4);
- hwif->hw.io_ports[IDE_HCYL_OFFSET] = SIBYTE_IDE_REG(0x1f5);
- hwif->hw.io_ports[IDE_SELECT_OFFSET] = SIBYTE_IDE_REG(0x1f6);
- hwif->hw.io_ports[IDE_STATUS_OFFSET] = SIBYTE_IDE_REG(0x1f7);
- hwif->hw.io_ports[IDE_CONTROL_OFFSET] = SIBYTE_IDE_REG(0x3f6);
- hwif->hw.irq = K_INT_GB_IDE;
- hwif->irq = K_INT_GB_IDE;
- hwif->noprobe = 0;
- /* Use our own non-byte-swapping routines */
- hwif->ideproc = sibyte_ideproc;
- hwif->selectproc = sibyte_selectproc;
- hwif->intrproc = sibyte_intrproc;
- memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports));
- printk("SiByte onboard IDE configured as device %in", i);
- sb_ide_hwif = hwif;
- }